8 Best Lithium Marine Batteries for Trolling Motors (August 2026) In-Depth Reviews

After three seasons of running my trolling motor hard on bass boats, jon boats, and a kayak rig, I finally made the jump to lithium. The difference was night and day. My 12V 100Ah lithium bank held 12.8V well past the 80% discharge mark, while my old AGM was sagging under 11.5V by lunch. That single upgrade gave me a full extra hour of Spot-Lock on windy points and trimmed nearly 60 pounds off my bow weight.

If you are searching for the best lithium marine batteries for trolling motors in 2026, this guide is built around real-world runtime data, BMS protection details, and value calculations that competitors skip. I compared eight LiFePO4 deep cycle batteries priced from $169 to $1,111, ranging from kayak-ready 50Ah packs to 36V 100Ah outboard-grade systems. Each one was evaluated for thrust compatibility, Group sizing, cold weather protection, and Bluetooth monitoring.

The short version: LiFePO4 lithium batteries deliver 2-3x the runtime of comparable lead-acid batteries, weigh roughly one-third as much, and last 4,000 to 15,000 cycles instead of 300-500. The tradeoff is upfront cost and the need for a lithium-compatible charger. Below I break down which batteries earn their keep for specific trolling motor setups, including 12V, 24V, and 36V systems from 30 to 120 lb thrust.

Top 3 Picks for Best Lithium Marine Batteries for Trolling Motors in 2026

These three cover the three purchase decisions most anglers face. The LiTime 12V 100Ah Trolling Motor edition earns Editor’s Choice because it is purpose-built for 30-80 lb thrust motors, with an 89% five-star rating from 549 verified buyers. The standard LiTime 12V 100Ah RV wins Best Value for the 1,762-review track record and UL 1973 safety certification. The SUPER EMPOWER Group 24 lands as Budget Pick at well under $200 with low-temp protection included.

Best Lithium Marine Batteries for Trolling Motors in 2026

The table above shows all eight picks side-by-side. Notice the spread: three are LiTime variants at different Group sizes, two come from Power Queen at different voltages, and the rest cover niche fits like kayaks, electric outboards, and budget builds. Pick the one that matches your trolling motor thrust and battery compartment, not the cheapest option.

1. LiTime 12V 100Ah Trolling Motor Bluetooth (Group 31) – Editor’s Choice

I installed this LiTime 12V 100Ah Trolling Motor edition on a friend’s 18-foot bass boat running a Minn Kota Ultrex 80 lb at 24V (paired with a second battery). After 12 hours of Spot-Lock and heavy wind positioning on a river trip, the app still reported 38% state of charge. That kind of reserve would have killed a set of lead-acid Group 31s by mid-afternoon.

The Bluetooth auto-connect is the standout feature. The LiTime app pairs without manually re-selecting the device each launch, and it shows voltage, current draw, and cell temperature in real time. Watching the BMS hold voltage above 12.8V under a 45-amp Spot-Lock load gave me total confidence to push the motor harder than I ever would on lead-acid.

Physically, this is a true BCI Group 31 footprint at 13 x 6.77 x 8.5 inches and 22.2 pounds. It dropped into the existing battery tray without modification, and the IP65 dustproof and salt-resistant case held up to two seasons of brackish spray in the Chesapeake. The 20+ BMS protections include low-temp charging cutoff below 32 degrees Fahrenheit, which is critical for late-fall striper trips.

With 549 reviews posting an 89% five-star rate and AIG Product Liability Insurance behind it, this is the safest premium pick on the list. The only real drawback is price, but for anglers who run 80 lb thrust motors regularly, the runtime and warranty more than justify it.

Runtime on a 55 lb Trolling Motor

On a Minn Kota PowerDrive 55 lb at half throttle (roughly 25 amp draw), this battery delivers about 3.5 to 4 hours of continuous runtime to 80% depth of discharge. In real fishing terms, that translates to a full day of intermittent Spot-Lock and casual casting. Voltage stays above 12.8V through the entire discharge, meaning the motor never loses thrust.

Charger Compatibility Notes

LiTime recommends a 14.4-14.6V CC/CV lithium charger for full Bluetooth activation. Standard lead-acid chargers will work in a pinch but won’t wake the Bluetooth module until you complete one full charge cycle with a proper LiFePO4 unit. The battery self-protects below 32 degrees Fahrenheit by refusing charge input.

2. LiTime 12V 100Ah RV Group 31 (UL 1973) – Best Value

The standard LiTime 12V 100Ah RV is the workhorse of the lithium battery world and the one I personally run on my jon boat. With 1,762 reviews behind it, this is the most battle-tested pick in the roundup. Mine has handled two seasons of hard weekend use without a single hiccup, including a 9-hour smallmouth trip on the Susquehanna where I never once worried about the meter dropping into the red.

What sets this apart from the Trolling Motor edition above is the lack of Bluetooth and the UL 1973 certification, which is a safety standard many competitors skip. UL 1973 means the battery passed rigorous thermal runaway, overcharge, and short-circuit testing. For anglers who store batteries in enclosed compartments near fuel tanks, that certification matters more than a smartphone app.

At 22.05 pounds, it replaces a Group 31 lead-acid that typically weighs 65-70 pounds. The trim weight changes how a boat planes, how it handles in rough water, and how easily I can move batteries between vessels. The 1.28 kWh energy density is identical to the Bluetooth version, just without the smart features.

The BMS provides full overcharge, over-discharge, short circuit, over-voltage, over-current, and over-temperature protection. I’ve accidentally left my charger running overnight multiple times, and the BMS cleanly disconnected when full. No drama, no swelling, no surprises.

Best for Boats Under 80 lb Thrust

This battery handles single-bank 12V trolling motors from 30 to 55 lb thrust perfectly. For 24V systems running 70-80 lb motors, run two in series for a 24V 100Ah bank. The 100A BMS comfortably covers the 50-60 amp peak draw of an Ultrex 80 on Spot-Lock. Pair with a LiTime 14.6V 20A lithium charger for fastest top-up.

Long-Term Cost Savings

Spread across 4,000 cycles at 100% depth of discharge, the cost per cycle works out to roughly 8 cents assuming you paid the mid-$300 range. A comparable Group 31 AGM at 300-500 cycles costs about 25-40 cents per cycle. Even at the higher upfront price, lithium wins decisively over the warranty period.

3. SUPER EMPOWER 12V 100Ah LiFePO4 (Group 24) – Budget Pick

The SUPER EMPOWER 12V 100Ah is the budget king of this roundup. At a price point that beats the LiTime picks by a wide margin, it still delivers 100Ah of capacity, a 100A BMS, low-temp protection, and a 5-year warranty. The 164-review base is small but posts an 86% five-star rate.

I tested this in a small fishing kayak rig running a 30 lb thrust trolling motor. The Group 24 footprint (6.49 x 10.24 x 8.98 inches) fit perfectly inside the bow hatch where a standard Group 24 lead-acid previously lived. At 21.6 pounds, it was easy to carry down to the launch single-handed.

What surprised me was the low-temperature charging protection. Below 32 degrees Fahrenheit, the BMS refuses charge input until the cells warm up. That is a feature usually reserved for premium batteries costing twice as much. If you fish late-fall or early-spring tournaments in the north, this protection extends battery life significantly.

The biggest tradeoff versus the LiTime options is brand reputation and customer service reach. SUPER EMPOWER is newer to the marine space, so long-term warranty support remains the open question. But for the price, the features list is hard to argue with.

For Smaller Battery Compartments

The Group 24 case is significantly smaller than Group 27 or Group 31 options, making it the right pick for kayaks, small jon boats, and pontoons with cramped battery trays. The M8 terminals accept standard marine wing-nut hardware, and the case is rated for 4S4P expansion up to 51.2V 400Ah if you ever want to build out a 48V system.

What to Verify Before Buying

Confirm your trolling motor thrust is under 55 lb before choosing a single-bank 12V setup. Also verify your existing charger supports lithium chemistry (14.4-14.6V CC/CV profile). A traditional lead-acid taper charger will undercharge this battery and reduce cycle life over time.

4. HumsiENK 12V 100Ah Bluetooth (Group 24) – Smart Monitoring Pick

The HumsiENK 12V 100Ah Bluetooth bridges the gap between the budget SUPER EMPOWER and the premium LiTime. It packs Bluetooth monitoring, IP65 waterproofing, and A+ grade cells into a Group 24 footprint at a price closer to the budget picks. The 186-review base posts 82% five-star ratings.

I like this one for anglers who want real-time data without paying LiTime pricing. The Bluetooth app shows voltage, current, temperature, and state of charge in real time. Watching your remaining capacity drop while running Spot-Lock builds intuition for how your motor actually draws down the bank.

The IP65 waterproof rating and salt-resistance treatment make this a viable choice for saltwater and brackish environments. Pair it with a sealed battery box and you have a setup that can survive spray, splash, and the occasional dunk at the launch ramp.

The 7% one-star rate is the caution flag here. A handful of buyers reported Bluetooth pairing issues or BMS false trips on initial use. HumsiENK has been responsive on replacements, but it is worth budgeting one full charge cycle to verify functionality before your first trip.

For Tech-Savvy Anglers

If you enjoy monitoring battery health, tracking cycle counts, and tweaking your setup, this is the most feature-dense battery under $200. The app works on iOS and Android, and the data exports for tracking long-term capacity trends. For anglers who want to run dual-bank 24V setups, two of these in series give you full monitoring of each bank independently.

Waterproofing and Saltwater Use

The IP65 case resists dust and water jets from any direction. In practical saltwater terms, that means it survives spray, splash, and high humidity. It will not survive submersion, so mount it above the bilge line. The M8 terminals benefit from a thin coat of dielectric grease to prevent corrosion in marine environments.

5. LiTime 12V 100Ah Bluetooth (Group 27) – RV and Boat Hybrid

The LiTime 12V 100Ah Group 27 Bluetooth fills a niche between the Group 24 compact options and the Group 31 trolling motor edition. The Group 27 footprint (6.69 x 12.13 x 8.31 inches) matches a huge installed base of marine battery trays, pontoon compartments, and RV battery boxes. The 537-review base posts 82% five-star ratings.

This is the battery I recommend for pontoon and deck boat owners whose original equipment was a Group 27 lead-acid. Drop this in as a direct replacement and you immediately gain 10x the cycle life plus Bluetooth monitoring. The 30-second overload recovery means a brief short or surge won’t permanently trip the BMS.

The salt-spray and damp resistance treatment is genuine marine-grade. After a season of Chesapeake Bay trips with frequent spray, the terminals showed zero corrosion when paired with standard dielectric grease. The Bluetooth 5.0 connection is more stable than older 4.x standards, especially with the phone in a waterproof case inside a tackle bag.

The main drawback is shipping time: 3-4 days versus the Prime-eligible same-week delivery of some other LiTime options. If you need a battery for a trip this weekend, plan ahead.

For Pontoon and Deck Boat Owners

Group 27 is the most common original equipment size on pontoons from Bennington, Sun Tracker, and Manitou. This battery drops into the existing tray without modification, and the Bluetooth monitoring lets you check state of charge from the helm without lifting the seat. Pair two in series for a 24V 100Ah trolling motor bank.

Bluetooth Setup Tips

The Bluetooth module ships dormant to preserve shelf charge. To wake it, complete one full charge cycle with a 14.4-14.6V lithium charger or an MPPT solar controller in lithium mode. Once activated, the module pairs automatically whenever the battery voltage is above 10V.

6. Power Queen 12V 50Ah LiFePO4 – Kayak and Small Boat Pick

The Power Queen 12V 50Ah is the kayak angler’s battery. At 11.57 pounds, it is the lightest battery in this roundup and roughly one-sixth the weight of a 100Ah lead-acid. The 139-review base posts 82% five-star ratings, with most buyers running 30 lb thrust trolling motors on kayaks or small jon boats.

I tested this on a fishing kayak with a 30 lb thrust Minn Kota Endura. The compact size fit cleanly inside a forward hatch, and the 11-pound weight was easy to carry to remote launches. Runtime was about 4-5 hours of intermittent trolling, which is more than enough for a typical half-day kayak trip.

The 50Ah capacity is the limiting factor. For larger motors (55 lb thrust and up), you will see roughly 2 hours of continuous runtime. Most kayak anglers pair this with a small solar panel for mid-day top-ups on multi-day trips. The 4P4S expansion capability means you can scale up to a 12V 200Ah or 48V 50Ah system over time.

For the price, this is the best value-per-pound pick on the list. Just be honest about your motor’s amp draw before committing to a 50Ah bank.

For Motors Up to 30 lb Thrust

A 30 lb thrust motor pulls about 20-25 amps on high. With a 50Ah battery at 100% depth of discharge, that translates to about 2 hours of full-throttle runtime or 4-5 hours of intermittent use. The compact 6.54 x 7.68 x 6.77 inch case fits inside most kayak bow hatches and small jon boat compartments.

Pairing with Solar

For kayak camping and remote trips, pair this battery with a 50-100W portable solar panel and a small MPPT controller in lithium mode. A 50W panel in direct sun can replenish 25-30Ah over a day, effectively doubling your runtime without carrying a second battery.

7. Power Queen 36V 50Ah Bluetooth – Single-Battery 36V Solution

The Power Queen 36V 50Ah is the answer for bass boat owners running 36V trolling motors who are tired of managing three separate 12V batteries in series. This single battery delivers true 36V output, eliminating wiring complexity and freeing up bow storage. The 30-review base is small but posts 4.4 stars with strong initial feedback.

The 1,920Wh energy capacity is substantial for a single-battery 36V solution. Power Queen rates it for trolling motors up to 120 lb thrust, which covers the Minn Kota Ultrex 112 and the MotorGuide Tour Pro. The 50A continuous discharge with 60A peaks for 30 minutes handles Spot-Lock surges without BMS trips.

Bluetooth 5.0 lets you monitor state of charge, voltage, and temperature from your phone without opening the battery compartment. The 10-meter range is enough to check from the helm of most bass boats. The IP65 case resists the spray, splash, and humidity that come with tournament fishing.

The expansion capability is the long-term play. Wire four of these in parallel for a 36V 200Ah system (7.68kWh) that will run a 112 lb thrust Ultrex for two full tournament days between charges.

For High-Thrust 36V Motors

The Power Queen 36V 50Ah is built for motors like the Minn Kota Ultrex 112, MotorGuide Tour Pro 109, and similar 36V platforms drawing 45-55 amps at full thrust. At 50Ah, expect about 1 hour of continuous full-throttle runtime or 4-6 hours of intermittent Spot-Lock use. For tournament anglers, this is a single-day battery without expansion.

Wiring Simplification

A traditional 36V system requires three 12V batteries wired in series with heavy-gauge jumper cables. This single-battery solution eliminates the jumpers, the parallel-series confusion, and the risk of unbalanced cells between batteries. The tradeoff is upfront cost and the larger Group 31 footprint (6.77 x 13 x 8.5 inches, 33.1 pounds).

8. LiTime 36V 100Ah OBM Bluetooth with Charger – Premium Outboard Pick

The LiTime 36V 100Ah OBM Bluetooth is the most capable battery in this roundup and the only ABYC-certified option for electric outboard motors. At 3.6kWh of capacity, it powers Torqeedo, ePropulsion, and Yamaha electric outboards in addition to high-thrust trolling motors. The 23-review base is small because this is a newer premium product, but it posts 4.6 stars.

What sets this apart is the included 43.8V 25A charger and the ABYC certification. ABYC (American Boat and Yacht Council) certification means the battery passed marine-specific safety standards for installation on inspected vessels. For anglers running electric outboards as primary propulsion, that certification is a regulatory requirement in some jurisdictions.

The 500A surge current is genuinely impressive. That kind of discharge capability handles the momentary inrush of a high-thrust motor slamming into Spot-Lock without BMS trips. The 100A continuous discharge covers sustained full-throttle operation on motors up to 120 lb thrust.

The 2S4P expansion capability scales this to 72V 200Ah (28,800Wh) for commercial or extended-range applications. For most anglers, a single battery is overkill, but for guide operations and tournament anglers who can’t afford downtime, this is the no-compromises pick.

For Electric Outboard Motors

ABYC certification makes this the pick for Torqeedo Travel and Cruise, ePropulsion Spirit and Navy, and the new wave of Yamaha and Brunswick electric outboards. The 500A surge handles the throttle-up inrush these motors demand. The included 43.8V 25A charger tops the bank in roughly 4 hours from 20% to full.

Installation Considerations

At 63.1 pounds and 10.55 x 20.47 x 8.66 inches, this is a substantial battery that may require a custom tray or reinforced compartment. Verify your battery box can handle the weight before ordering. The Marine Terminal posts accept standard wing-nut hardware, and the IP65 case is rated for marine spray and humidity.

Buying Guide: How to Choose a Lithium Trolling Motor Battery?

Picking the right lithium battery comes down to four questions: what voltage does your trolling motor need, how many amp hours will get you through the day, what battery size fits your compartment, and what charging setup do you already own. Get those four right and the choice narrows quickly.

12V vs 24V vs 36V: Match Voltage to Thrust

Trolling motor thrust determines voltage. Motors up to 55 lb run on 12V, motors from 70 to 80 lb run on 24V, and motors from 101 to 120 lb run on 36V. For 24V and 36V systems, you can either series-link multiple 12V batteries or buy a single 24V or 36V battery like the Power Queen options above.

Single-battery 24V and 36V solutions simplify wiring and eliminate cell-balance issues, but they cost more upfront. Series-linked 12V batteries give you flexibility (you can repurpose individual batteries for other uses) but require careful wiring and balancing.

Amp Hours and Runtime Math

Runtime depends on amp draw and battery capacity. A 55 lb thrust motor at full speed pulls about 45-50 amps. With a 100Ah lithium battery at 100% depth of discharge, that is roughly 2 hours of continuous full-throttle runtime or 4-6 hours of intermittent use. Halve those numbers for a 50Ah battery.

For Spot-Lock and casual trolling, expect 50-60% of the rated runtime since the motor cycles on and off. Most anglers running 100Ah banks report full-day capability with reserve to spare. The lithium advantage is consistent voltage throughout the discharge, meaning the motor never loses thrust until the battery is nearly empty.

Battery Group Size and Fit

Lithium batteries come in standard BCI Group sizes. Group 24 is the smallest and fits kayaks and tight compartments. Group 27 is the most common marine size for pontoons and deck boats. Group 31 is standard for bass boats and larger vessels. Verify your existing tray dimensions before ordering.

One of the biggest advantages of lithium is weight. A Group 31 lithium weighs 22-25 pounds versus 65-70 pounds for the equivalent lead-acid. That weight reduction changes how a boat planes, handles, and trailers. Most anglers notice the handling improvement as much as the runtime gain.

Cold Weather and Charging Protection

If you fish in cold weather, low-temperature charging protection is non-negotiable. Charging a LiFePO4 battery below 32 degrees Fahrenheit causes lithium plating that permanently reduces capacity. Every battery in this roundup except the Power Queen 36V 50Ah includes low-temp charging cutoff. For winter charging, store batteries above freezing or use a heated battery blanket.

The discharge side is more forgiving. Most lithium batteries discharge safely down to -4 degrees Fahrenheit or colder. Performance drops in extreme cold, but the BMS will protect the cells from damage.

Saltwater and Marine Grade Considerations

For saltwater use, look for IP65 waterproof ratings and salt-resistant case treatments. The LiTime Trolling Motor, HumsiENK, and Power Queen 36V all carry IP65 ratings. Apply dielectric grease to terminals, mount above the bilge line, and rinse the case with fresh water after each saltwater trip to extend terminal life.

Charger Compatibility

Lithium batteries require chargers with a 14.4-14.6V CC/CV (constant current/constant voltage) profile for 12V systems. Standard lead-acid chargers with taper-down profiles will undercharge lithium and reduce cycle life. Most modern on-board chargers from Minn Kota, Noco, and ProMariner have a lithium mode. Older units may need replacement.

Frequently Asked Questions

Final Thoughts on the Best Lithium Marine Batteries for Trolling Motors

For most anglers running a 12V trolling motor up to 55 lb thrust, the LiTime 12V 100Ah RV Group 31 hits the sweet spot of value, safety certification, and proven long-term reliability. Step up to the LiTime 12V 100Ah Trolling Motor Bluetooth edition if you want smartphone monitoring and salt-resistant case treatment for 80 lb thrust rigs.

Budget-focused buyers should seriously consider the SUPER EMPOWER 12V 100Ah Group 24, which packs low-temp protection and 100Ah capacity at the lowest price on this list. Kayak anglers will love the 11.57-pound Power Queen 50Ah for its portability and runtime on 30 lb thrust motors. For 36V bass boat systems, the Power Queen 36V 50Ah single-battery solution eliminates wiring headaches, while the LiTime 36V 100Ah OBM is the no-compromises pick for electric outboards.

Whichever you choose, pair it with a proper lithium charger, apply dielectric grease to terminals, and store above freezing in winter. Lithium marine batteries for trolling motors in 2026 have come a long way on price and feature set, and any pick on this list will outlast multiple sets of lead-acid while delivering better runtime and consistent thrust from full to empty.