The most frustrating moment in fishing is not losing a fish. It is drifting across a promising seam, reaching for the rod, and finding the trolling motor dead at half throttle with nothing left in the bank. That silent failure almost always traces back to one decision: the battery you picked when the boat was in the driveway.
Choosing among the best deep cycle batteries for trolling motors is harder than it looks. The listings all say deep cycle, they all quote amp-hours, and half of them cost about the same. What separates them is chemistry, real usable capacity, weight, group size fit, warranty length and whether your charger will actually work with them. Get those five right and a mediocre battery quietly ruins a season.
We spent the last few months working through the specifications, owner reviews and forum threads that actually decide this purchase, then ranked 12 batteries from 50Ah kayak packs up to a 24V bank for 70-100 lb thrust motors. If you are still choosing between chemistries, our lithium marine battery guide covers that decision in more depth, and our marine deep cycle battery roundup covers broader boat electrical setups.
Table of Contents
Top 3 Best Deep Cycle Batteries for Trolling Motors in 2026
If you want the short version: the WEIZE 100Ah AGM is the most proven choice, the LiTime 100Ah LiFePO4 is the one that changes how your boat feels, and the Mighty Max 55Ah is the sensible small-boat pick. Each gets a full write-up below.
Quick Overview: All 12 Trolling Motor Batteries Compared in 2026
How We Picked These Trolling Motor Batteries
We scored every candidate on seven axes, weighted toward the things anglers actually complain about. Usable capacity after depth of discharge limits came first, then weight per amp-hour, then group size fit, then warranty length, then battery management system ratings, then charger compatibility, and finally monitoring features. We did not score on peak marketing claims, because the gap between a claimed cycle count and a measured one is where buyers get disappointed.
Second, we read the owner reviews closely rather than the specification tables. A battery can have a beautiful spec sheet and a pattern of one-star reports about charge retention. The reverse happens too. Where a review pattern showed up repeatedly, we named it in the cons for that battery instead of leaving it out.
Third, we cross-checked against forum discussion, because warranty service is where spec sheets stop being useful. Owners on thehulltruth.com describe ten-year warranties as the deciding factor and report the manufacturer replacing a battery that failed after six or seven years. On r/boating, owners running LiTime packs on multiple boats report no issues. Those are the signals that change a recommendation, and we weighted them accordingly.
What we did not do is run a full season on each battery on open water. Our testing is desk research, spec analysis and review synthesis, so treat every runtime figure in this guide as a calculated expectation rather than a measurement. Where we give a runtime estimate, we show the arithmetic so you can adjust it for your own motor and conditions. For the batteries themselves, our solar deep cycle battery guide covers the same chemistry decisions from a different angle.
1. WEIZE 12V 100Ah AGM Deep Cycle — Best Proven All-Rounder
- Long proven service life with multi-year owner reports
- Reliable multi-hour trolling runtime on a single charge
- Discharge rated down to -15C for cold starts
- Includes bolts
- washers
- lock washers and carry strap
- Sturdy build with a large installed base of owners
- 57 lb is a serious lift into a small boat
We keep coming back to this battery because the sample size is enormous. Nearly 17,000 reviews averaging 4.5 stars is not a marketing artifact, it is a long-term reliability signal, and it is the reason this one takes our top slot. One owner reports three years of continuous service in an off-grid system and has since bought a fourth unit. That is the pattern you want to see from a battery you cannot easily replace mid-season.
On the water, owners consistently report several hours of dependable trolling runtime per charge, and the 1150A five-second maximum discharge figure means it will feed a high-thrust motor without balking. The self-discharge rate of 1-3% per month also means a battery sitting in the garage over the off-season will not be dead when spring arrives.
Two owners report losing roughly half the pack’s charge after about 60 days of storage, and both eventually received seller replacements. The warranty is one year, which is the weakest protection in this group, and the listing notes that Amazon does not process battery returns directly, so you deal with the seller. If a one-year warranty bothers you, the Renogy below carries two years.
Cold weather is where this chemistry still wins outright. The listed discharge range runs to -15C, and owners in freezing climates report better cold performance than their lithium packs. For an early-season opener on a lake that ices over, that is a real argument.
Who this battery suits
This is the pick for a bass boat on a big lake where you will carry one or two batteries, want proven long service life, and need charging that works with the lead-acid charger you already own. The 57 lb weight matters less in a 16-foot boat than it does in a jon boat.
It also suits anyone who fishes in cold shoulder seasons and refuses to deal with low-temperature charging cutoffs. Nothing on this battery stops working because the morning air is 28F.
Who should skip it
If your boat is a jon boat, a kayak or anything you carry solo, 57 lb is disqualifying on its own. A 100Ah lead-acid pack is three times the weight of the equivalent lithium, and you will feel that on every launch.
Skip it if you want a warranty longer than a year, or if you plan to add batteries in parallel later and want the BMS monitoring that lithium packs provide. The feature set here is deliberately plain.
2. Renogy 12V 100Ah Deep Cycle AGM — Best for High-Thrust Lead-Acid Builds
Renogy 12 Volt 100Ah Deep Cycle AGM Battery, Lead Acid Solar Battery
- Established brand with a large global installed base
- 1100A max discharge supports high-thrust motors
- Discharge rated from -4F to 140F
- Series and parallel wiring up to 4P supported
- Heaviest battery reviewed at nearly 64 lb
- About 50% usable capacity versus nearly 100% for LiFePO4
Renogy is the name most boaters have heard, and with over 230,000 units sold worldwide the support network is real in a way that newer brands cannot match. Over 3,500 reviews averaging 4.4 stars reflects a long, stable production history rather than a launch spike.
On paper the electrical spec is close to the WEIZE: 100Ah, 1100A maximum discharge, self-discharge under 3% per month at 25C. The electrolyte formula is rated for discharge from -4F to 140F, so it covers both a winter opener and a hot summer afternoon under the console.
The two-year prorated material and workmanship warranty is longer than most lead-acid competitors manage, and that matters more than most buyers realise at purchase time. Forum owners repeatedly name whether a manufacturer honours a warranty years later as the deciding factor when choosing a brand.
The weight is the problem. At 63.9 lb this is the heaviest battery in our entire group, and the 13.1 by 6.9 by 8.6 inch case is large enough that a standard Group 24 box will not close over it. Budget for a new box before the battery arrives.
Who this battery suits
Choose it if you already trust Renogy, if your charger is a standard lead-acid unit, and if your boat is big enough that 64 lb lands where you want it. It is also a good second battery for a 24V bank, since series and parallel configurations up to 4P are supported.
Pick it when cold-weather discharge matters more than weight. That -4F lower limit is one of the widest in this roundup for lead acid.
Who should skip it
Anyone moving a battery by hand twice a day should look at lithium instead. Halving usable capacity compared to LiFePO4 also means your effective runtime is roughly half the 100Ah number on the label, which surprises new buyers more than any other spec.
Skip it if your battery box is already tight. The size will not drop in, and that is a modification you do not want to make on a trailer.
3. Mighty Max 12V 55Ah Deep Cycle — Most Versatile for Small Boats
Mighty Max Battery 12V 55Ah Power Boat Pontoon Electric Trolling Motor Deep Cycle Battery
- Rated 4.6 stars from more than 1600 reviews
- Owners report 4-6 hours of trolling runtime
- Compact Group 22NF footprint suits kayaks
- UL certified and mountable in any orientation
- Heavy for its capacity
- about half the rated 55Ah is usable
- Needs a full trickle charge before first use
This is the small-boat answer. At 55Ah in a Group 22NF case, it is the only battery here sized for a kayak or a compact jon boat, and its 4.6 stars from more than 1,600 reviews make it the strongest-rated lead-acid option we found. Owners on r/boatbuilding running 12 ft jon boats with 28 lb thrust motors repeatedly single out weight as the reason bigger packs were unusable, and this is the pack that fits anyway.
Runtime reports cluster around 4-6 hours per charge, which lines up with what the chemistry can deliver. With roughly 50% usable capacity, a 55Ah SLA gives you closer to 27Ah of working energy, so treat the headline number as a ceiling rather than a promise.
One owner still has theirs working after two years in freezing conditions, and the sealed spill-proof design mounts in any position, which matters in a boat where level mounting is a luxury. The F2 terminals are a small detail, but they tell you this is a real deep cycle case, not a repurposed starting battery.
Two practical notes. The box contains the battery and screws only, with no wire harness or mounting hardware, so plan for that. And it needs a full trickle charge before first use, then should be kept above 25% remaining to maximise life.
Who this battery suits
Kayak anglers, small jon boats and anyone running a 30 lb thrust motor on a 12V system. The compact case fits where a Group 24 physically cannot go, and UL certification is a genuine plus if you are putting a lithium-adjacent power source in a fiberglass hull.
It also suits buyers who want zero chemistry complications. No app, no special charger, no cold-weather cutoff logic to understand.
Who should skip it
Skip it for anything above a 50 lb thrust motor or for all-day multi-battery trips. The 55Ah capacity runs out, and lead acid gives you only about half of it before the voltage sags under load.
Skip it if weight is your concern. One owner reports it nearly sank a kayak until it was repositioned forward, and that is a real risk at this capacity class.
4. LiTime 12V 100Ah TM LiFePO4 Bluetooth — Best Lithium All-Rounder
- Highest rated battery in the group at 4.7 stars
- About half the weight of a comparable 100Ah AGM
- 1280Wh with up to 15000 cycles at 60% DOD
- Bluetooth app shows live state of charge and discharge control
- Most expensive option in the roundup
- Requires a lithium MPPT or activation charger
- One unit arrived dead and would not accept a charge
At 4.7 stars with 89% of reviews at five stars, this is the highest-rated battery we reviewed, and the reports behind that number are specific. One owner describes returning from a full day of trolling in 25 mph gusts with 72% charge still on the app. That is the LiFePO4 advantage in practice: 4000 cycles at 100% depth of discharge, 6000 at 80%, and up to 15000 at 60%.
The weight is 22.2 lb for a full 100Ah, 1280Wh Group 31 case. Compared with 57-64 lb for the AGM options in this guide, that difference is roughly 35 lb of tongue weight per battery, and on a 36V bank it multiplies across three.
Owners on r/kayakfishing who have made the switch consistently point to weight savings and a more consistent discharge rate as the reasons. The same owners warn about the charger, and that warning is correct: a standard lead-acid charger is not the right tool here. The listing also notes the Bluetooth module needs a lithium activation or MPPT charger to wake up.
There is no escaping that this is the most expensive battery in the group, and pricing moves with promotions. The case is IP65 rated, salt resistant, and carries 20+ protection features with a 100A-class BMS. Terminal hardware and a small wrench come in the box, and some variants include two-level self-heating for cold-weather charging.
Who this battery suits
Boats where weight is the binding constraint, multi-day trips without shore power, and anyone running electronics off the same bank who wants an accurate state-of-charge readout rather than a voltage guess. The app reports live state of charge, amp draw and discharge control, which is the single most useful feature on the list.
It also suits buyers planning to expand. Four units in 4P4S configuration reach 51.2V and 400Ah, or 20.48kWh.
Who should skip it
Skip it if you do not already have a lithium-profile charger or have no plan to buy one. Charging it with the wrong profile is how good lithium batteries get ruined early.
Skip it if you fish primarily in hard cold and want charging to keep working below freezing. Charging stops below 32F unless you have the self-heating variant. The one DOA report among 645 reviews is rare, but it is the kind of failure that ends a trip.
5. HumsiENK 12V 100Ah LiFePO4 Group 24 — Best Value 100Ah Lithium
HumsiENK 12V 100Ah LiFePO4 Lithium Battery with Bluetooth (Group 24) 1280Wh
- Only 19.7 lb
- over 60% lighter than comparable lead acid
- True Group 24-31 fit so it drops into standard boxes
- 100A smart BMS with app for voltage and temperature
- 5-year warranty
- Newer brand with a much smaller review base
- No self-heating so cold charging simply stops
- 100A BMS is modest beside some 100Ah rivals
At 19.7 lb this is the lightest full-size 100Ah pack we found, and it manages that while staying inside a genuine Group 24 to Group 31 envelope at 10.2 by 6.6 by 8.2 inches. For anglers whose existing battery box is sized for a Group 24 lead-acid, that means no cutting, no new box, no relocation.
The app is the selling point alongside the weight. A 100A smart BMS feeds real-time voltage and temperature data to a dedicated app, with protection against overcharge, over-discharge, over-current and short circuits. Operating range is -4F to 158F with automatic low-temperature shutdown, and the cells are A+ grade, UL tested and IP65.
Reviewers consistently highlight the weight-to-capacity ratio and the box fit at a price well below the premium lithium brands. The 5-year warranty is among the longest in this group, and the manufacturer states 24-hour customer service response.
The honest caveat is the review base. 340 reviews is thin next to the 16,964 behind the WEIZE, and a small share of one-star reports relate to early BMS or connectivity issues. Expansion to 4S4P gives you 48V and 20.48kWh if you outgrow it.
Who this battery suits
Boats with a Group 24 box that must accept lithium, buyers who want 100Ah at the lowest weight in the roundup, and anyone who wants a five-year warranty without paying the premium lithium price. It is also a clean choice for a 24V bank, since two of these in series give you a light 24V system.
Pick it if you want a lithium pack and only need a standard lead-acid charger. The BMS handles the charging profile.
Who should skip it
Skip it if cold-weather charging is part of your routine. There is no self-heating function, so charging simply stops below the cutoff and the battery sits idle on a freezing morning.
Skip it if you run a very high-thrust motor and want headroom. A 100A BMS is adequate but not generous, and Bluetooth range is limited compared with some competitors.
6. BtrPower 12V 50Ah LiFePO4 — Best for Kayaks and 30-50 lb Motors
12V 50Ah Trolling Motor LiFePO4 Battery,5000+ Deep Cycle lithium Battery
- Only 11 lb so it mounts where lead acid cannot
- 5000+ rated deep cycles
- 50A BMS matched to 30-50 lb motors
- Compact Group 24-class footprint
- Up to 4 units can be wired in series or parallel
- 50Ah limits runtime on larger boats
- 50A BMS suits mid-thrust motors only
- Recommended charge current is 10A or less
This is the cheapest way into lithium, and at 11 lb it is roughly one third the weight of a lead-acid equivalent. The 5000+ rated deep cycles figure against 300-500 for traditional lead acid is the number that changes the replacement timeline, and buyers consistently treat it as the reason to move.
It is explicitly aimed at 30-50 lb trolling motors, which includes the Minn Kota, Newport Vessels and PEXMOR models most kayak anglers run. The built-in 50A BMS handles overcharge, over-discharge, over-current and short circuit protection and adds cell balancing, which is what keeps a small pack evenly charged over time.
Weight is the real advantage here, and it is not marginal. A lead-acid pack of similar usable capacity in a kayak can sit low enough in the hull to affect stability, and at 11 lb this one does not. The 5.5 by 9 by 8.3 inch case with M8 terminals is compact and easy to secure.
Charging is the compromise. The recommended current is 10A or less at 14.4-14.6V, which is deliberately gentle and means an overnight charge rather than a lunch-break top-up. There is no Bluetooth or app monitoring, so state of charge has to be judged another way.
Who this battery suits
Kayak and small jon boat anglers running 30-50 lb thrust motors who want lithium weight without a large budget. It is also a good starter pack if you plan to add a second unit later, since up to four batteries can be connected in series or parallel.
Choose it for a build where every pound counts more than raw capacity.
Who should skip it
Skip it for 55 lb thrust and up. The 50A BMS and 50Ah capacity leave no headroom for a hard push against current, and an under-specced BMS trips rather than delivers.
Skip it if you want quick turnaround charging between sessions, or if the 1-year warranty is unacceptable to you. It is the shortest cover among the lithium picks here.
7. LiTime 12V 50Ah TM LiFePO4 Bluetooth — Best for Kayak Electronics Setups
LiTime 12V 50Ah Trolling Motors LiFePO4 Lithium Battery for Fish Finder
- One of the lightest 50Ah marine lithium batteries available
- 60A (1.2C) continuous discharge tuned for peak motor thrust
- Bluetooth 5.0 connects without pairing and shows state of charge
- Owner fished two full days on a kayak with 37% left
- Insulating caps and M8 hardware included
- Bluetooth state-of-charge reading unreliable below about 0.5A draw
- Some units would not accept a charge out of the box
- Warranty service may require shipping the battery overseas
Where the BtrPower matches capacity, this one matches discharge. The 1.2C rating, 60A continuous for 30 minutes, is specified to hold peak trolling motor thrust rather than merely sustain a low draw. That distinction matters when you punch through a current line with a loaded boat behind you.
At 11.27 lb and 640Wh with EV-grade LiFePO4 cells, it is a genuinely compact package. The Bluetooth 5.0 module with a built-in BMS and QR code connects to the LiTime app without a pairing step, and it shows state of charge directly rather than asking you to interpret a voltage curve.
Owners report fishing two full days on a Jackson Big Rig kayak and returning with 37% remaining, which is the kind of margin that removes battery anxiety entirely. The 5-year after-service warranty is a real point in its favour against smaller-capacity rivals.
There is a specific app quirk worth knowing. The state-of-charge reading is unreliable for very low draws under about 0.5A, such as a fish finder sitting idle, so do not read the app as a fuel gauge for your electronics. Some units also arrived unable to accept a charge, resolved by return.
Who this battery suits
Anglers running a modest trolling motor plus a fish finder or electronics off the same bank, where discharge headroom and monitoring both matter. It is also a strong choice for anyone who fished two days on a small craft and wants the option to do it again.
Pick it if you want lithium and want to see charge state without a multimeter.
Who should skip it
Skip it if your motor exceeds 60A peak draw. That is the ceiling on this pack, and a bigger motor will ask for more than the BMS can deliver without tripping.
Skip it if the idea of an international warranty return puts you off, or if you rely on the app for very low-current monitoring, where the reading is known to be inaccurate.
8. SUPER EMPOWER 12V 100Ah Group 24 — Best Drop-In Replacement
12V 100Ah LiFePO4 Battery, Group 24 Deep Cycle RV/Trolling Motor Battery
- True Group 24 drop-in with M8 terminals and no modifications
- 21.6 lb cuts a substantial load off a small boat
- 100A BMS handles high-thrust motors without strain
- 5-year warranty with stated 24-hour support response
- Charging resumes automatically once temperatures rise
- No Bluetooth or app monitoring on this variant
- Charging is fully disabled below 32F
- Non-lithium chargers are not recommended and can cause imbalance
Most lithium packs are close to Group 24 without actually being Group 24. This one is specified as BCI Group 24 with M8 terminals and described as a true drop-in replacement for lead acid, AGM or SLA. If you want to lift lead-acid out and drop lithium in without touching the box, the case dimensions at 6.49 by 10.24 by 8.98 inches are what you are buying.
The 100A integrated BMS is the strongest in this roundup for high-thrust applications, protecting against overcharge, over-discharge, overcurrent, short circuit and temperature. At 21.6 lb for 1280Wh, it is one of the better capacity-to-weight ratios available, and it expands to 4S4P for 51.2V and 20.48kWh.
Reviewers value the accurate fit and clean BMS behaviour, and the 4.6-star rating across more than 200 reviews reflects a consistent product rather than a marketing claim. The 5-year warranty with a stated 24-hour support response is a real differentiator among the newer lithium brands.
Two things to plan for. Charging pauses below 32F and resumes above 41F, so a cold morning means the battery is deliberately idle, not charging. And this variant has no Bluetooth; a Bluetooth version exists as a separate variant if monitoring matters to you.
Who this battery suits
Owners upgrading a boat with a Group 24 box and no appetite for moving anything. It is also a good high-thrust match given the 100A BMS, and a sensible middle ground for a 24V bank built from two series units.
Choose it if you prefer a plain, monitored battery with no app dependency and want the longest warranty among the lighter Group 24 lithium options.
Who should skip it
Skip it if you want live battery telemetry. There is no app on this variant, and that is the feature many buyers are actually paying lithium premiums for.
Skip it for early-season fishing in freezing conditions. Full charging disablement below 32F is exactly the complaint forum owners raise about budget lithium, and it is the main reason WEIZE and Renogy still sell well in cold states.
9. DC HOUSE 12V 100Ah Bluetooth LiFePO4 — Best for Per-Cell Diagnostics
DC HOUSE 12V 100Ah Bluetooth LiFePO4 Trolling Motor Lithium Battery
- App reports data down to the individual cell with fault notifications
- UL and UN38.3 certified Class A cells
- Up to 15000 rated cycles and a 10-year stated service life
- Group 24 footprint accepted by most standard marine boxes
- 23.8 lb is far lighter than a 100Ah AGM
- About 0.32 inches taller than a standard Group 24 so clearance needs checking
- App Bluetooth range only 5-10 meters
- Cannot be configured as 4P4S
Most Bluetooth batteries report pack-level numbers. This one reports to the individual cell, with push notifications when a fault is detected and a dedicated fault display page. If you are the type of owner who wants to know which cell is drifting rather than just how full the pack is, that is a genuine difference and it is the reason this battery is worth shortlisting.
Class A LiFePO4 cells carry UL and UN38.3 certification, rated for up to 15,000 cycles with a stated 10-year service life. The 100A BMS and 23.8 lb weight sit mid-pack, and the Group 24 sized case means most standard marine boxes will accept it.
Cold behaviour is handled explicitly. Charging stops below 19.4F, discharge stops below -4F, and recovery is automatic above 32F, which is a wider operating window than most of the lithium packs here and a lower cutoff than the 32F stops that frustrate owners.
Two constraints to note. At 0.32 inches taller than standard Group 24, measure your box clearance before ordering. And the app’s Bluetooth range is 5-10 meters, so your phone has to be physically near the battery. Expansion is limited to eight batteries because 4P4S is not permitted.
Who this battery suits
Multi-battery builds and anyone troubleshooting a bank, where per-cell visibility is worth more than raw capacity. The 19.4F charging cutoff also makes it the most tolerant of the lithium options for early-season cold starts.
Choose it if you plan to run fish finders and electronics off the same bank and want fault alerts rather than a voltage guess.
Who should skip it
Skip it if you want a 4P4S configuration. Eight batteries is the ceiling and the 4P4S layout is explicitly not supported, so plan a different architecture if you are building large.
Skip it if you need warranty cover longer than three years, or if your battery box has no clearance for the extra three-tenths of an inch. That is a small detail that strands a lot of otherwise good builds.
10. VEMDIA 12V 100Ah LiFePO4 Group 31 — Best for Fast Charging Turnaround
12V 100Ah LiFePO4 Lithium Battery Group 31 Deep Cycle for RV Trolling Motor
- Lowest cost per amp-hour of any 100Ah lithium option here
- 24 lb Group 31 drop-in fits standard marine boxes
- Full charge in about 5 hours with a 20A LiFePO4 charger
- 100A smart BMS with no thermal runaway risk
- Insulating caps and M8 terminal bolts included
- Lowest rating in the group at 4.3 stars
- Highest internal resistance listed at 120 milliohms
- 2-year manufacturer warranty is the shortest among the lithium picks
- No Bluetooth monitoring
- Charging stops below 32F with no self-heating
Charging speed is this battery’s argument. A full charge in about 5 hours with a 14.6V 20A LiFePO4 charger is roughly three times faster than lead acid, which turns a lost afternoon into a solved problem. For anyone fishing several days from one launch point, that turnaround is worth planning around.
The case is a genuine BCI Group 31 at 12.9 by 6.6 by 8.5 inches, so it drops into standard marine boxes without modification, and at 24 lb it is 70% lighter than the lead-acid equivalent. Cycle life is rated 4000 at 100% depth of discharge, 8000 at 80% and 15000 at 60%.
The 100A smart BMS protects against overcharge, over-discharge, over-current and short circuits, and LiFePO4 chemistry eliminates thermal runaway risk. It also supports 4S4P expansion to 51.2V and 400Ah.
Where it falls short is measurement. Internal resistance is listed at 120 milliohms, the highest in this roundup, and that shows up under high-thrust loads where voltage sags. The 4.3-star rating with 12% one-star reviews reflects that, and the 2-year warranty is the shortest cover among the lithium picks. There is no Bluetooth monitoring, so state of charge has to be judged another way.
Who this battery suits
Multi-day trips and shared boats where charging time is the constraint, and buyers who want the lowest cost per amp-hour of any 100Ah lithium in this group. The Group 31 drop-in dimensions make it an easy retrofit into an existing marine box.
Pick it if a five-hour recharge and a long cycle life matter more than telemetry or warranty length.
Who should skip it
Skip it for a 80-105 lb thrust motor on a single 12V pack. The 120 milliohms internal resistance is exactly the spec that sags under a hard load, and a 36V system is where you would notice it most.
Skip it if a two-year warranty is too thin. Owners on thehulltruth.com treat long warranties as a primary filter, and this is the shortest one here. Charging also stops below 32F with no self-heating option.
11. LGECOLFP 24V 50Ah LiFePO4 — Best for 24V Systems and 70-100 lb Motors
- Only single-pack 24V option here
- matching 70-100 lb motors without series wiring
- 50A continuous with 60A for 30 minutes handles surges
- Lower current draw reduces cable cost over long runs
- IP65 ABS housing is compact and light
- Only a 12-month warranty with a 3-month return window
- One reported early failure after about five trolling trips
- 50A BMS constrains motors above the 60A surge allowance
- No Bluetooth or app monitoring
This is the only battery here that delivers a true 24V architecture in one case. Most 24V trolling setups are two 12V batteries in series, which means twice the wiring, twice the connections and a matched pair to maintain. This pack removes that, and it is built specifically for 70-100 lb thrust motors.
Discharge is 50A continuous with 60A for 30 minutes to absorb power surges, rated for 4000+ cycles. The IP65 ABS housing measures 10.24 by 6.6 by 8.3 inches to BCI Group 24 standards, and the stated energy density of 66.7Wh per lb minimises boat load.
The 24V approach lowers current draw and therefore cable cost over long runs, which is the practical argument for it beyond convenience. Expansion reaches 10.24kWh at a maximum 4P2S configuration.
The warranty is the weak point, and it is the weakest in the roundup. Twelve months with a three-month free return window is thin, and one reviewer reports a unit failing after roughly five trolling trips with the seller declining a replacement past the return period. Several owners do report customer service quickly replacing units with bad cells, so the experience is inconsistent. There is also no Bluetooth monitoring.
Who this battery suits
Owners of 24V trolling motors rated 70-100 lb thrust who want one battery instead of a series pair. It is also a good fit for installations where cable run length is long and current losses are the concern, and for off-grid or solar builds needing a higher voltage pack.
Choose it if simplicity of wiring beats warranty length and monitoring features.
Who should skip it
Skip it if your 24V motor pulls more than 60A. The 50A BMS is a hard constraint, and exceeding the surge allowance is how a pack gets returned.
Skip it if a 12-month warranty with a three-month return window is a dealbreaker. This is the shortest cover in the group, and with a 4.4-star rating the failure reports are not purely historical.
12. BUKNUWO 12.8V 100Ah LiFePO4 — Best Lightweight 100Ah Under 23 Pounds
12.8V 100Ah LiFePO4 Battery With Low Temp Protection,1280Wh 15000+ Deep Cycles, Lightweight Lithium Battery for Marine, Boat,RVs,Yacht,Off Grid(12.8V 1 00Ah)
- 22 lb for 1.28kWh is one of the better capacity-to-weight ratios here
- 95% usable capacity against about 50% for lead acid
- App reports SOC
- voltage
- current
- wattage
- cycle count and temperature
- One owner measured about 1889 watt-hours against a claimed 1920
- Lowest rating in the group at 4.2 stars
- One owner lost about half the charge in two days unused
- Bluetooth app sometimes fails to connect on first attempt
- App does not display individual cell voltages
- Inverter inrush can trip the BMS overcurrent protection
At 22 lb for 1.28kWh, this pack is right at the top of the weight-to-capacity efficiency curve, and the 95% stated capacity utilisation against about 50% for lead acid is the technical explanation for why lithium runtimes feel unpredictable in a good way. Cycle life is rated 4000 at full discharge, 6000 at 80% and 15000 at 60%.
The telemetry is unusually detailed for the category. The Bluetooth 5.0 app reports state of charge, voltage, current, power, temperature, charge and discharge status and protection status within roughly 33 ft, and one owner who ran a measured load test saw about 1889 watt-hours against a claimed 1920, which is close enough to trust the number.
The 100A BMS covers overcharge, over-discharge, short circuit, overheat and overcurrent plus high and low temperature cutoff, with discharge rated from -4F to 140F and optimal charging from 32F to 113F. The 5-year warranty is generous for this bracket, and monthly self-discharge is under 5%.
It is also the lowest rated battery in the group at 4.2 stars, with 11% one-star reviews. The specific complaints are worth reading before you buy: one owner lost about half the charge in two days while unused and described the return process as difficult, and the app sometimes fails to connect on the first attempt with an inconsistent refresh rate. Expansion to 4S4P gives 51.2V and 400Ah, and inverter inrush can trip the overcurrent protection, so a 0V-activation LiFePO4 charger may be needed to wake a tripped pack.
Who this battery suits
Anglers who want a full 100Ah at the lightest weight available, and who are comfortable reading an app for a genuine state-of-charge figure rather than a voltage estimate. It is also a good fit for builds that need bank expansion later, since 4S4P is supported.
Choose it when weight is the priority and you have tested the app on a similar pack before committing.
Who should skip it
Skip it if you leave the boat unattended for days and expect the pack to hold a charge. The self-discharge report is the most serious complaint in the file.
Skip it if you need per-cell visibility, and be careful with inverter inrush, which can trip the overcurrent protection. A 0V-activation LiFePO4 charger may be needed to wake a tripped pack. With 111 reviews, this is also the thinnest evidence base in the roundup.
Buying Guide: How to Choose a Deep Cycle Battery for a Trolling Motor?
The single biggest decision is chemistry, and it cascades into everything else: weight, usable capacity, charger and cold-weather behaviour. Get that right and the rest is arithmetic. Get it wrong and no amount of brand loyalty fixes it.
AGM or LiFePO4: what actually changes
Lead-acid chemistry, including AGM, stores energy you cannot fully use and then wears out from the cycling. That is why the runtime maths below matters so much: a 100Ah AGM is closer to 50Ah of working energy, while a 100Ah LiFePO4 pack is close to its full rating. Owners on forum threads describe lithium’s more consistent discharge rate, not just its capacity, as the reason they switched.
Cycle life follows the same pattern. Traditional lead acid is rated in the hundreds of cycles, while the lithium packs in this guide are rated between 4000 and 15000 depending on depth of discharge. In practice a lithium battery replaces an AGM two or three times over its life, which is where the cost difference mostly disappears.
Weight is the decisive factor for small boats. A 100Ah AGM here weighs 57 to 63.9 lb; the 100Ah lithium options weigh 19.7 to 24 lb. On a 36V bank that is the difference between roughly 170 lb and 70 lb of batteries. Owners running 12 ft jon boats with 28 lb thrust motors name weight as the single reason most batteries were unusable for them.
Warranty runs the other way. The AGMs here carry one and two years. The lithium options run from one year to five, and thehulltruth.com owners describe long warranty terms as the deciding factor, including a report of a manufacturer replacing a battery that failed after six or seven years under a ten-year term.
How long the charge lasts: doing the runtime math
Runtime is usable amp-hours divided by motor draw. Usable amp-hours is the label rating multiplied by the depth of discharge your chemistry allows, roughly 50% for AGM and close to 90-95% for LiFePO4.
As a working example, a 30 lb motor drawing about 15A on a 100Ah AGM gives you roughly 50 usable Ah, or about 3.3 hours. The same motor on a 100Ah LiFePO4 gives about 90 usable Ah, or around 6 hours. A 55 lb motor drawing closer to 30A on that same AGM pack gives roughly 1.6 hours, and about 3 hours on lithium.
For a kayak on a 30 lb motor, a 50Ah LiFePO4 pack with about 46 usable Ah is the practical minimum. For a 55 lb thrust motor running a full day, you want 100Ah of lithium or a second battery in parallel. Note that lead-acid figures assume you stay above a 50% state of charge; push below that and you accelerate sulfation, which is the early capacity fade forum owners complain about.
Matching capacity, thrust and voltage
Match voltage to the motor first. A 12V system needs 12V batteries, a 24V system needs two in series and a 36V system needs three. Every battery in a series bank should be the same chemistry, the same capacity and close to the same age, or the weakest cell dictates the performance of the whole bank.
Then match the BMS to the motor. A 30-50 lb motor pairs with a 50A BMS, while 80-105 lb motors on a full bank want 100A or more. That is why the BtrPower 50Ah pack suits a 30 lb motor and not a 55 lb one, and why the VEMDIA’s 120 milliohms internal resistance is worth noticing on a big motor.
For high-thrust builds, most batteries here support 4S4P expansion, with the exception of the DC HOUSE, which caps at eight batteries and does not permit a 4P4S layout. Check the expansion rules before you design a bank around a specific model.
Group size and battery box fit
Measure before you order. Weize and Renogy are both physically larger than a standard Group 24 and will not fit an existing case. The HumsiENK and SUPER EMPOWER are specified as genuine Group 24 drop-ins, the VEMDIA and LiTime 100Ah are Group 31, and the DC HOUSE is Group 24 but about 0.32 inches taller, so clearance needs checking. If your box is undersized for a new battery, our battery box guide covers the sizes worth upgrading to.
Charging, cold weather and winter storage
LiFePO4 needs a charger with a lithium charge profile at 14.4-14.6V CC/CV, or an MPPT controller set to lithium mode. Owners on r/kayakfishing are explicit that a lithium-compatible charger is the one thing not to skip, and forum discussions note that LiFePO4 charge algorithms are not comparable to AGM or gel performance. A standard lead-acid charger will undercharge lithium and can trip the BMS.
Cold weather is where the two chemistries diverge sharply. AGM discharges down to -4F in the Renogy and -15C in the WEIZE and keeps working. Most lithium packs here stop charging below 32F, and the DC HOUSE is the exception at 19.4F. If you fish an early-season opener in freezing conditions, either buy a self-heating variant or stay with lead acid.
For winter storage, keep lead acid fully charged on a maintainer, and store lithium at partial charge in a cool, dry place. Lead acid self-discharges at 1-3% per month and lithium under 5%, so both hold over a winter, but a lithium pack that sits at full charge for months is not being treated well. Salt water is the other risk; IP65 cases on the LiTime, HumsiENK, DC HOUSE and LGECOLFP handle spray far better than a vented lead-acid case.
Frequently Asked Questions
How long will a 100Ah battery run a 55lb trolling motor?
It depends on chemistry more than the label. A 100Ah AGM gives roughly 50Ah usable, so a 30A draw on a 55lb motor lasts about 1.5 to 2 hours. A 100Ah LiFePO4 pack gives roughly 90Ah usable, extending that to about 3 hours. For a full day of trolling on a 55lb motor, run 100Ah of lithium or two batteries in parallel.
Which battery is better for a trolling motor, AGM or lithium?
Lithium, for most anglers. A 100Ah LiFePO4 pack weighs 19.7 to 24 lb against 57 to 63.9 lb for the equivalent AGM, delivers roughly 90-95% of its rated capacity instead of about 50%, and is rated for 4000 or more cycles. AGM still wins on cold-weather discharge and on avoiding a lithium-profile charger.
Are lithium batteries bad for or damaging to trolling motors?
No. A LiFePO4 battery does not damage a trolling motor or its controller. Motors draw steady current, which is exactly what lithium cells are good at, and the BMS in these packs regulates discharge current, temperature and over-discharge. The real cautions are charging with a lead-acid charger and exceeding the BMS amperage rating for a very high-thrust motor.
Do LiFePO4 trolling motor batteries need a special charger?
Yes. They need a lithium charge profile at 14.4 to 14.6V CC/CV, or an MPPT solar controller set to lithium mode. A standard lead-acid charger undercharges lithium packs and can trip the BMS. Some packs also need a lithium activation charger to wake the Bluetooth module or a battery that has gone to sleep.
Which marine battery has the best warranty?
Among the batteries reviewed here, the LiTime 12V 100Ah TM, the HumsiENK 12V 100Ah, the SUPER EMPOWER 12V 100Ah and the BUKNUWO 12.8V 100Ah each carry a 5-year warranty, while the Renogy AGM carries a 2-year prorated term. Forum owners consistently rate warranty length and whether it is honoured years later as a primary decision factor.
Final Verdict: The Best Deep Cycle Batteries for Trolling Motors in 2026
After working through all 12, the best deep cycle batteries for trolling motors split cleanly by situation. The WEIZE 12V 100Ah AGM takes our Editor’s Choice for the best balance of proven longevity, cold-weather tolerance and no charging complications, backed by the largest review base we found. If weight is what is holding you back, the LiTime 12V 100Ah TM LiFePO4 is the answer, and the HumsiENK gets you most of the way there for less. Small boats should start at the Mighty Max 55Ah, and 24V systems have a single-pack answer in the LGECOLFP.
Two things to settle before you order: a lithium-profile charger if you go lithium, and the group size your battery box actually accepts. Miss either one and the best battery in the world becomes an expensive mistake. If you are still working out the motor side of the equation, our saltwater trolling motor guide covers matching thrust to your hull and water.