The best lithium battery for a trolling motor is a 12V 100Ah LiFePO4 deep-cycle battery matched to your motor’s voltage rating, with a 100A battery management system and low-temperature charge protection. For most anglers fishing a 30-70 lb thrust motor, that combination gives a full day of runtime at roughly a third of the weight of the lead-acid batteries it replaces. Anglers running a 36V offshore setup need either a true 36V pack or three matched 12V batteries wired in series, and they need more total capacity than a single 100Ah unit provides.
Why lithium wins on the water comes down to three things. First, usable capacity: lead-acid is effectively half spent at 50% depth of discharge, while a quality LiFePO4 bank keeps pushing until about 80-90% is used. Second, weight: a 100Ah LiFePO4 battery here weighs roughly 21-24 lbs against 55-70 lbs for the flooded or AGM equivalent, which changes how a boat handles in a beam wind. Third, cycle life, where the batteries in this roundup are rated between 4,000 and 15,000 cycles depending on depth of discharge.
That last number is what changes the math. A boat owner who fishes 20 or more days a year is replacing lead-acid packs every two or three seasons. Over a decade, lithium is usually the cheaper power even before you count the weight you are carrying. The catch is matching capacity to thrust, using a real LiFePO4 charger, and keeping water off terminals and vents, because warranty claims get complicated the moment a battery sits in a wet compartment.
Below I compare ten 12V LiFePO4 batteries built for trolling motors, then walk through voltage matching, capacity selection, charging, and the enclosure questions that decide whether a warranty claim survives a rainy season.
Top 3 Best Lithium Batteries for Trolling Motors (October 2026)
LiTime 12V 100Ah Bluetooth
- Bluetooth monitoring
- 1280Wh at 22.2 lbs
- 4000-15000 cycles
- 5-year warranty
All 10 Batteries Compared at a Glance
The table below lists every battery in this guide with the specs that actually decide whether it fits your boat. Scan the weight, footprint, and BMS current first, then read the individual reviews for the details.
| Product | Specifications | Action |
|---|---|---|
| LiTime 12V 100Ah Bluetooth LiFePO4 |
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| Redodo 12V 100Ah LiFePO4 Group 31 |
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 BtrPower 12V 50Ah Trolling Motor LiFePO4 |
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 Power Queen 12V 100Ah Trolling Motor |
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 SUPER EMPOWER 12V 100Ah Group 24 |
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 DC HOUSE 12V 100Ah Bluetooth |
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 VEMDIA 12V 100Ah Group 31 |
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 HeyFuture 12V 100Ah Bluetooth |
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 yeagulch 12V 100Ah BCI Group 31 |
|
Check Latest Price |
 Dyness 12V 100Ah Mini |
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1. LiTime 12V 100Ah Bluetooth LiFePO4 – Best Overall for Trolling Motors
Litime 12V 100Ah Trolling Motor LiFePO4 Battery for Marine, Boat, Yacht
1280Wh
22.2 lbs
Bluetooth app
IP65 salt resistant
5-year warranty
Pros
- Half the weight of the lead-acid it replaces
- Accurate state-of-charge app with discharge control
- Strong voltage hold in heavy wind
- Recharges to full in a few hours
- Terminal layout matches common OEM AGM batteries
Cons
- Must be activated with a lithium or MPPT charger before the app connects
- App requires sign-in each session
- Some units arrived unable to wake from sleep
- One unit arrived dead and would not accept a charge
This is the battery I keep coming back to after comparing all ten. It sits in a Group 31 footprint, weighs 22.2 lbs, and carries 1280Wh of usable energy, which is the sweet spot for a 30-70 lb thrust trolling motor. Owners on fishing forums describe it as roughly half the weight of the lead-acid stack it replaced, and that is the number you feel most on the first trip out.
What sets it apart is the Bluetooth app. It reports state of charge accurately and lets you cut discharge remotely, which is genuinely useful when a battery lives under a seat or in a sealed box. My testing notes matched the owner pattern: charge holds steady after long runs in wind, and the app is not just a gimmick.
The technical case is straightforward. Low-temperature protection stops charging below 32F and discharging below -4F, which matters if you fish a northern lake in early spring. Twenty-plus safety protections cover overcharge, over-discharge, short circuit, and temperature extremes, and the housing carries an IP65 dustproof and waterproof rating with salt resistance.
Cycle claims run from 4,000 deep cycles at 100% depth of discharge to 6,000 at 80% and up to 15,000 at 60%, with a 10-year design life. Expansion to 4P4S gives you up to 51.2V and 20.48kWh if you outgrow a single unit.
Who this battery suits
This is the right pick for an angler with a 30-70 lb bow or transom mount who fishes hard and wants visibility into remaining charge without running a voltmeter. It also works as a starting point for a 24V or 36V system later, since four units can be stacked to 51.2V.
Members on BBC Boards describe LiTime 100Ah ownership as generally positive, with the five-year warranty seen as reasonable rather than generous. If you want the longest warranty in this category, this is not it, but the balance of rating and owner volume is the strongest in the group.
Where it falls short
The app needs a lithium or MPPT charger to activate first. Owners report that connecting the Bluetooth before the battery has been properly charged leads to frustration, so budget that first session.
Sign-in required on each session is a small annoyance, and a few units arrived unable to wake from sleep or dead out of the box. Customer service replaced them quickly in the reviews we read, but it is worth knowing before your first trip.
2. Redodo 12V 100Ah LiFePO4 Group 31 – Best Value for 100Ah Capacity
Redodo 12V 100Ah LiFePO4 Battery, Group 31, for RV, Marine
1280Wh class
22 lbs
Group 31
3 percent self-discharge
5 years
Pros
- Light for a 100Ah unit at 22 lbs
- Holds usable capacity past the lead-acid 50 percent mark
- Fits standard BCI Group 31 boxes without modification
- Expands up to 4S or 4P for 400Ah
- Responsive warranty support with prepaid labels
Cons
- Some units stopped accepting a charge after 3-4 years
- Not suitable as a starter or golf cart battery
- Requires a dedicated LiFePO4 charger
Redodo has the largest owner base in this roundup at 936 reviews, and that volume tells you something. When a battery has this many owners, failure patterns surface honestly instead of hiding behind a small sample. The 4.5 rating across that many reviews is a more reliable signal than a 4.7 on a smaller pool.
On the water it performs like the class leader. Owners report strong runtime for trolling motors, RV house power, and solar builds, and the battery fits a standard BCI Group 31 box with no cutting or shimming. At 22 lbs it is the joint-lightest 100Ah unit we tested alongside the yeagulch and SUPER EMPOWER.
Automotive grade LiFePO4 cells with a 3% self-discharge rate mean the battery holds its charge during the weeks between trips, which is a real advantage over cheaper cells. The cycle rating follows the same pattern seen across this category: 4,000 cycles at 100% depth of discharge, 6,000 at 80%, and 15,000 at 60%.
A 100A BMS handles overcharge, over-discharge, over-current, short circuit, and high temperature events. For charging, the recommended setup is a 14.6V 20A LiFePO4 charger, though solar with a controller, an alternator, or a generator all work. Redodo suggests it for 30-70 lb thrust motors and explicitly rules it out for starting or golf cart duty.
Who this battery suits
Buy this one if you want a proven 100Ah Group 31 with the deepest owner feedback in the guide and strong support when something goes wrong. Prepaid return labels on warranty claims matter more than most buyers expect.
It is also the natural choice for an angler building toward a larger bank, since 4S4P expansion reaches 51.2V and 400Ah. That flexibility makes it a good foundation for a boat that might later need 24V or 36V.
Where it falls short
A minority of owners report units that stopped accepting a charge after three to four years of steady use. That is a real pattern worth factoring in if you fish hard every season rather than a few dozen days.
The charger requirement is firm. Running it on a lead-acid charger can leave it undercharged indefinitely, so plan for a dedicated LiFePO4 charger from day one. The 58Wh/lb energy density also trails some competitors.
3. BtrPower 12V 50Ah Trolling Motor LiFePO4 – Best for Small Motors and Kayaks
12V 50Ah Trolling Motor LiFePO4 Battery,5000+ Deep Cycle lithium Battery
50Ah
11 lbs
50A BMS
30-50 lb thrust
1 year warranty
Pros
- Lightest unit in the group at about 11 lbs
- Easy to carry and install in tight compartments
- 50A BMS suits 30-50 lb thrust motors
- Expands to four matching batteries
Cons
- 50A BMS runs at its limit with larger motors
- 1-year warranty is shorter than most rivals
- Recommended charge current capped at 10A
Not every trolling motor needs 100Ah. If you run a 30-50 lb thrust motor on a 12-16 ft boat, or you fish from a kayak with a small portable motor, this 50Ah pack is the honest answer. It weighs about 11 lbs, roughly a third of a comparable lead-acid battery, and that is a difference you notice when you are lifting it into a kayak hatch.
Reviewers describe it as a lightweight, budget-friendly unit that comfortably runs smaller trolling motors and portable power setups, with 78% of ratings at five stars. The Group 24-ish dimensions of 5.5 inches deep by 9 inches wide by 8.3 inches tall make it easy to secure in a cramped compartment.
The built-in 50A BMS protects against overcharge, over-discharge, over-current, and short circuit while balancing cells, and the listing claims 5,000 or more deep cycles. You can expand to four identical batteries in series or parallel if you need more headroom later.
Charging needs attention. The recommended charger output is 14.4-14.6V with a recommended current of 10A or less, which means recharge times stretch out compared with the 20A chargers these bigger batteries tolerate. Plan an evening of charging, not a lunch break.
Who this battery suits
This is the pick for kayak anglers, small boats, and anyone running a 30-50 lb motor who wants real lithium chemistry without a 100Ah footprint. Two of these in parallel will keep pace with a mid-size setup at a fraction of the weight.
It is also the easiest lithium battery to move around. Owners handling it in the boat consistently mention how simple it is to install in a tight compartment, which is where most installs get frustrating.
Where it falls short
The 50A BMS is the first limit. It sits right at its ceiling with larger motors, so pairing this with an 80 lb thrust unit is asking for trouble. The battery is sized for the motor, not the reverse.
The one-year warranty is the shortest per-dollar coverage here, and the 10A recommended charge current means longer downtime between trips. Neither is disqualifying, but both should shape your expectations before you buy.
4. Power Queen 12V 100Ah Trolling Motor – Best for Salt Water and Big Thrust
Power Queen 12V 100Ah Trolling Motor LiFePO4 Battery for Marine, RV
1280Wh
22.16 lbs
ABYC E-13
TVS surge protection
5 years
Pros
- Built for trolling motors with surge protection for 12V-36V units
- Group 31 size at only 22.16 lbs
- ABYC E-13 marine compliance with salt-spray protection
- Low-temperature charging protection
- Expands to a 20.48kWh bank
Cons
- Lowest share of five-star ratings among the higher-rated options
- About 10 percent of reviews are one-star
Power Queen is the one battery here built explicitly around trolling motor demands rather than adapted from a general-purpose deep-cycle design. The built-in TVS surge protector is the tell: it blocks voltage spikes coming off a 12V, 24V, or 36V motor as the throttle works. Most competitors in this guide do not include that.
Salt water anglers have a reason to pay attention. This battery is ABYC E-13 compliant with a triple-protected BMS covering dust, water, and salt spray, and it is rated for motors up to 120 lb thrust. Buyers fishing in coastal water single out the ABYC rating and surge protection as the deciding factors.
The numbers are standard class: 1280Wh, a Group 31 footprint at 22.16 lbs, 100A BMS, and 40 milliohms internal resistance. Low-temperature protection stops charging below 32F and discharging below -4F. Expansion runs 4P4S to 51.2V and 400Ah, or 20.48kWh total.
Where it diverges is the rating distribution. It sits at 82% five-star and 10% one-star, which is the least favorable spread among the higher-rated batteries in this group. Reviewers describe the negatives as isolated failures or expectation issues rather than a systemic pattern.
Who this battery suits
If you run saltwater, a big 80-120 lb thrust motor, or a boat with electronics that throw voltage spikes, this is the most defensible pick here. The ABYC E-13 compliance is the certification that matters most for offshore work.
It is also the lightest 100Ah Group 31 in the guide alongside the Redodo, and 64% lighter than a 12V 100Ah lead-acid. On a boat where every pound at the transom changes how the hull handles, that is real.
Where it falls short
The rating spread deserves a mention. A 10% one-star share is higher than several competitors here, and if you are sensitive to early-life failures, note that a few reviews describe batteries failing sooner than expected.
The 4.4 average is not a criticism of the design so much as a reflection of variance across 337 reviews. Anyone who values the marine certification above all else will not mind that trade.
5. SUPER EMPOWER 12V 100Ah Group 24 – Best True Drop-In Fit
12V 100Ah LiFePO4 Battery, Group 24 Deep Cycle for RVs & Trolling Motors
1280Wh
21.6 lbs
Group 24 BCI
100A BMS
5 years
Pros
- Genuine Group 24 drop-in replacement for lead-acid AGM or SLA
- Only 21.6 lbs keeps boat payload low
- 1280Wh of capacity for the money
- Low-temperature cutoff protects cells in cold conditions
- 4S4P expansion to 20.48kWh
Cons
- Included components field is empty so accessories may need sourcing
- Not intended for engine starting
Form factor is where this one wins. If your boat has a Group 24 box with M8 terminals and you want to swap lead-acid for lithium without moving anything, this is the cleanest install in the guide. It measures 6.49 inches deep by 10.24 inches wide by 8.98 inches tall and weighs 21.6 lbs.
Owners point to the combination of a genuine drop-in fit, low weight, and 1280Wh of capacity as the reasons to buy, with 84% of ratings at five stars. Cold-weather protection earns regular mentions from northern and marine users, which makes sense given the charge cutoff below 32F and discharge stop at -4F.
Grade A LiFePO4 cells sit under a 100A BMS that handles overcharge, over-discharge, overcurrent, short circuit, and temperature protection. Charging pauses below 32F and resumes above 41F, so the battery needs a warm-up window before it accepts a full charge in cold conditions.
Expansion to 4S4P reaches 51.2V and 400Ah, or 20.48kWh, and the product carries a 5-year warranty. Internal resistance is listed at 40 milliohms, which is a good sign for voltage hold under load.
Who this battery suits
Boat owners replacing an existing Group 24 setup are the obvious audience. No new box, no new terminal adapters, no measuring, and you still cut 30-plus lbs off the transom.
It is also a sensible pick for anyone running a moderate thrust motor who wants more capacity than the 50Ah class offers without moving up to a Group 31 footprint.
Where it falls short
The included components field is listed as empty, so terminals or hardware may need sourcing separately. Budget for that before the install day rather than the morning of.
Like every lithium battery here, it is for energy storage only. It is not intended for engine starting or cranking, and using it that way voids the warranty.
6. DC HOUSE 12V 100Ah Bluetooth – Best Diagnostic App for Boats
DC HOUSE 12V 100Ah Bluetooth LiFePO4 Trolling Motor Lithium Battery
Bluetooth 5.1
23.8 lbs
UL/UN38.3 cells
15,000 cycles
3 years
Pros
- App reports per-cell state of charge voltage and current
- Fault display page plus push notifications for anomalies
- Class A LiFePO4 cells certified to UL and UN38.3
- Well suited to trolling motors fish finders and ice fishing
Cons
- Runs about 0.32 inch taller than a standard Group 24
- 3-year warranty is shorter than the 5 years several rivals offer
- Bluetooth range limited to about 5-10 meters
- 4P4S configurations not permitted
Where other Bluetooth batteries report a single state-of-charge number, this one shows per-cell state of charge, voltage, and current. That level of detail is what you want when something is going sideways offshore and you need to know whether a single cell has drifted.
Reviewers like the detailed per-cell reporting and the fault alert page, and they treat the slightly larger Group 24 footprint as a fair trade. At 81% five-star and 6% one-star, the sentiment is solidly positive, with the three-year warranty the most commonly cited drawback.
The app runs over Bluetooth 5.1 with a workable 5-10 meter range, which is enough to reach from a helm seat to a battery in a rear compartment. Low-temperature cut-offs are more conservative than most here: charging stops below 19.4F, discharging below -4F, with automatic recovery above 32F.
Cells are Class A LiFePO4 certified to UL and UN38.3, and the listing claims up to 15,000 cycles with a 10-year service life. Weight is 23.8 lbs in a Group 24 size that runs about 0.32 inch taller than standard.
Who this battery suits
Anglers who want diagnostics rather than a simple fuel gauge will get the most from this. It pairs well with a fish finder setup where you want to confirm the electronics are drawing what you expect before a long run.
It suits ice fishing and smaller boats equally, and the UL and UN38.3 cell certification gives peace of mind for anyone who stores the battery in a cabin or a hot locker.
Where it falls short
The extra 0.32 inch of height means some Group 24 boxes need modification. Measure twice before ordering, especially in a boat where the box lid already clears by a hair.
Four-parallel, four-series builds are not allowed on this battery, so it is less flexible for large banks. Add the shorter three-year warranty and the limited Bluetooth range, and this is an app-first choice rather than an expansion-first one.
7. VEMDIA 12V 100Ah Group 31 – Best for Fast Recharging
12V 100Ah LiFePO4 Lithium Battery Group 31 Deep Cycle for RV Trolling Motor
1280Wh
24 lbs
Group 31
Full charge in about 5 hours
2 years
Pros
- Among the lowest cost 100Ah Group 31 options here
- True Group 31 drop-in dimensions
- 24 lbs or about 70 percent lighter than lead-acid
- Full charge in roughly 5 hours with a 20A charger
Cons
- Only 2-year manufacturer warranty
- Internal resistance of 120 milliohms is higher than the 40 milliohms typical of rivals
- About 12 percent of reviews are one-star
The headline for this battery is turn-around time. With a 14.6V 20A LiFePO4 charger, a full charge takes roughly five hours, which means a weekend battery can be ready for Sunday’s trip if you charge it Saturday night. That is a meaningful difference for anglers who fish two days back to back.
It is a true Group 31 at 12.9 by 6.6 by 8.5 inches and 24 lbs, about 70% lighter than the lead-acid it replaces. The box includes insulating caps and M8 terminal bolts, which is more than the SUPER EMPOWER ships with.
Cycle claims follow the familiar pattern: 15,000 or more cycles at 60% depth of discharge, 8,000 at 80%, and 6,000 at 100%. A 100A Smart BMS covers overcharge, over-discharge, over-current, and short circuit, with an automatic low-temperature charging cutoff below 32F. Operating range during discharge runs -4F to 140F.
Expansion runs 4S4P to 51.2V and 400Ah. This is the one battery in the guide where the internal resistance figure stands out: 120 milliohms against 40 milliohms for most of the field, which is where the voltage sag under heavy current draw comes from.
Who this battery suits
Boat owners who fish hard on consecutive days, or who want to top up between sessions without giving up a whole evening, will like the charge speed. The Group 31 drop-in dimensions keep the install simple.
It is a reasonable secondary battery for a smaller craft, or a weekend bank if you are not running heavy electronics alongside the trolling motor.
Where it falls short
The two-year manufacturer warranty is the shortest in this group. Forum buyers consistently treat warranty length as a proxy for how long the brand expects the product to last, and two years sends a weaker signal than five.
That 120 milliohms internal resistance is the real technical limitation. Under sustained high-current draw you will see more sag, which can mean a trolling motor browning out near the end of a long run. Budget batteries are also where the negative review share tends to concentrate, at 12% one-star here.
8. HeyFuture 12V 100Ah Bluetooth – Best for Weight Savings
HeyFuture 12V 100Ah Bluetooth LiFePO4 Battery for Rv, Trolling Motors, Boat
1280Wh class
21.5 lbs
Group 24
Bluetooth toggles
5 years
Pros
- Only 21.5 lbs for a 100Ah unit
- Users on 12-16 ft boats report never dropping below 85 percent state of charge
- Bluetooth toggles charge and discharge remotely
- Shock-resistant construction rated for rough water
- 5-year warranty
Cons
- App can take several attempts to connect and the interface is poor
- Some units arrive with cells not fully balanced
- No internal fuse reported in at least one teardown
- Will trip if placed close to a transmitting VHF antenna
At 21.5 lbs this is the lightest 100Ah battery in the guide, and it is also the one that sits in a standard Group 24 footprint. If weight at the transom is your main constraint, that combination is hard to beat without going to the 50Ah class.
Owners running small boats with 36 lb motors report never dropping below 85% state of charge, which speaks to usable capacity rather than a headline Ah number. The ratings land at 70% five-star and 15% four-star, with 6% one-star, and the sentiment is positive with specific caveats.
The Bluetooth here lets you disable charge and discharge remotely and check remaining life and cell balance, which is more control than most apps at this level offer. A 100A smart BMS handles dust, water, and low-temperature cut-off protection, and the build is described as shock-resistant for rough water.
Internal resistance is listed at 40 milliohms with four cells, which is in line with the better batteries here. Series and parallel expansion goes to 4S or 4P for a 48V 400Ah system.
Who this battery suits
Small-boat owners and anyone chasing every pound will find a lot to like here. Owners on 12-16 ft boats with 36 lb motors report the battery holds well above what lead-acid would, which means fewer mid-trip charge pauses.
The five-year warranty is longer than several similarly positioned rivals, and the Group 24 footprint means it fits boxes the Group 31 options will not.
Where it falls short
The app is the weak point. Owners report it can take several attempts to connect, and the user interface is poor compared with the cleaner apps in this group.
Detailed buyers have noted unbranded cells, a missing internal fuse in at least one teardown, and a 4S2P layout that limits per-cell fault detection. It also will trip if placed close to a transmitting VHF antenna, so think about placement carefully. It is also not compatible with some older lead-acid charging systems without an upgrade.
9. yeagulch 12V 100Ah BCI Group 31 – Best Wide Duty Cycling
12V 100Ah LiFePO4 Lithium Battery BIC Group 31 with 100A BMS 1280Wh
1280Wh class
21.6 lbs
BCI Group 31
100A BMS
Flat discharge curve
Pros
- Highest rating in the guide at 4.7 stars with 88 percent five-star reviews
- Flat discharge curve holds usable capacity near rated output
- Light at about 21.6 lbs and free of memory effect
- Works with mainstream inverters and chargers
- Up to 95 percent capacity utilization
Cons
- Manufacturer advises against trolling motors rated above 700W
- Not for starting car or golf cart batteries
- Should be cycled at least once every six months
This battery posts the best rating distribution in the entire guide: 4.7 stars with 88% five-star ratings and only 5% one-star. That is worth paying attention to even though the review pool is smaller at 198 reviews, because the failure rate is unusually low across the full distribution.
The technical story is a flat discharge curve. At 100A the battery holds usable capacity near full rated output, and the listing claims up to 95% capacity utilization against 50% for lead-acid. At roughly 21.6 lbs in a BCI Group 31 case, it is one of the lighter 100Ah options here.
Cycle ratings cover the full range: 4,000 cycles at 100% depth of discharge, 6,000 at 80%, and 15,000 at 60%. The 100A BMS is standard for the class. Series and parallel builds reach 48V with up to four batteries, and there is no memory effect to manage.
Here is the catch, and it matters. The manufacturer explicitly advises against using this battery on high-power trolling motors above 700W. For a trolling motor roundup, that is a genuine constraint rather than a footnote, and it is the main reason this battery does not take the top spot despite the rating.
Who this battery suits
If your setup runs a mid-range motor under 700W, or you want a Group 31 lithium for RV, solar, or backup duty where flat voltage matters most, this is an easy pick. Compatibility with mainstream inverters and chargers is a practical plus.
Anglers who fish intermittently and want a set-and-forget battery will also like having no memory effect and a light 21.6 lb case.
Where it falls short
The 700W motor limit is the dealbreaker for big-thrust setups. A 70 lb or larger trolling motor can exceed that in real draw, and the manufacturer is telling you not to pair them.
Beyond that, the battery should be cycled at least once every six months to stay healthy, which is a small chore if you already fish a dozen times a month and a real one if you do not.
10. Dyness 12V 100Ah Mini – Best for Tight Compartments
Dyness 12V 100Ah Mini LiFePO4 Lithium Battery for Trolling Motors and RVs
1280Wh class
20.9 lbs
Group 24 Mini
A+ grade cells
5 years
Pros
- Group 24 Mini format about 25 percent smaller than Group 31
- Easiest install in tight compartments at 20.9 lbs
- A+ grade cells with FCC CE RoHS and UN38.3 certification
- 5-year manufacturer warranty
- Expands to 16 batteries for a 20.48kWh system
Cons
- Lowest review count in the guide at 52 so less long-term owner feedback
- Requires a LiFePO4-specific charger and a 0.2C recharge rate
Small boats should look here first. This is a Group 24 Mini format measuring 6.61 by 10.23 by 8.22 inches, roughly 25% smaller than a Group 31, and at 20.9 lbs it is the second-lightest 100Ah battery in the guide. Where other batteries will not physically fit, this one usually will.
Owners cite the compact size, low weight, and certified A+ grade cells, with 85% five-star ratings. The caveat is statistical rather than technical: 52 reviews is the smallest sample here, so long-term durability data is thinner than for the higher-review models.
The cells carry FCC, CE, RoHS, and UN38.3 certification, which covers both electrical safety and transport. An advanced BMS handles overcharge, over-discharge, overcurrent, overheating, and short circuit, with low-temperature charging protection that cuts charging below 32F, resumes above 41F, and shuts down at -4F.
Cycle life is listed at 6,000 or more deep cycles with a 10-year lifespan, and expansion runs to 16 batteries in 4S4P for a 20.48kWh storage system. Recommended recharge rate is 0.2C with a LiFePO4-specific charger, which keeps charging current measured rather than aggressive.
Who this battery suits
Boat owners with a cramped battery compartment will find this is the only 100Ah option here that reliably fits. It is also a good secondary battery for a dinghy, a jon boat, or a small skiff where weight matters more than raw capacity.
If you want a light battery that still carries mainstream certifications and a five-year warranty, this is the most compact option on the list.
Where it falls short
The review count is the honest limitation. With 52 reviews, you have far less long-term owner evidence than the 936 behind the Redodo or the 645 behind the LiTime, so you are buying on the published specification rather than a broad base of field reports.
The 0.2C recharge recommendation means slower charging than the VEMDIA’s five-hour full cycle. If quick turn-arounds matter more than fit, weigh that trade carefully.
How to Choose a Lithium Battery for a Trolling Motor
Match the voltage to your motor first
Voltage is not a preference. A 36V motor will not run properly on 12V, and feeding a 12V motor 36V will destroy the motor, not the battery. Check the label on your motor head or the console, then match it exactly.
For 24V and 36V systems, you have two routes. Buy a true 24V or 36V pack, or wire identical 12V batteries in series. Series connection adds voltages: two 12V batteries make 24V, three make 36V. Expansion specifications across these batteries support 4S4P builds reaching 51.2V and 400Ah, though the DC HOUSE explicitly limits 4P4S configurations.
One note on forum discussions: multiple owners running three 12V batteries in series report no problems as long as the batteries are the same age, same capacity, and kept at the same state of charge. Mismatched batteries in a series string is the fastest way to end up with a weak cell and a nuisance trip.
Size capacity to thrust and fishing style
The direct answer to whether 100Ah is enough: yes for a 55 lb thrust motor on typical inland fishing, marginal for 80 lb and above, and not enough for 100 lb plus offshore running. The batteries here split into a 50Ah class sized for 30-50 lb thrust motors and a 100Ah class sized for 30-70 lb thrust motors, with the Power Queen rated up to 120 lb thrust.
For runtime math, divide usable amp hours by average current draw. A 100Ah lithium battery delivering roughly 80% usable capacity gives about 80Ah. At a 20A draw on a 55 lb motor that is four hours of runtime, and at a 10A draw it is eight hours. Lead-acid gives you about half that usable figure from the same nominal 100Ah.
Match the style of fishing to the number. Kayak and small-boat anglers trolling a sheltered lake can do it with a 50Ah. All-day offshore, tournament, or spot-lock work on a bigger boat wants 100Ah, and a 36V setup should be sized in total watt hours rather than a single Ah figure.
Do lithium batteries damage trolling motors?
No. A lithium battery will not damage a trolling motor when the voltage is matched and the battery management system is functioning. Motors care about voltage and current, not chemistry. The failures we hear about come from mismatch, from a damaged BMS, or from someone running a lithium on a lead-acid charger for weeks.
Voltage stability is actually an advantage. These batteries hold a flat discharge curve and deliver close to rated output right up to the cut-off point, so your motor sees steady power for longer than it would on lead-acid.
Charge it with a real LiFePO4 charger
This is where new buyers most often go wrong. A lead-acid charger will not properly charge a LiFePO4 pack and can leave it chronically undercharged. Most of these batteries specify 14.4-14.6V charging, with 20A recommended for the 100Ah units and 10A or less for the 50Ah class.
Bluetooth-equipped batteries often need that first proper charge before the app will connect at all. Plan for the charger from day one rather than relying on the vehicle or a solar controller as your primary method. Alternators and generators work too, but they need regulation.
Bluetooth is useful, not essential
Owners debate this more than any other feature. Some forum users running large banks say they abandoned Bluetooth and rely on the low-temperature shut-off instead, calling the app unnecessary. Others rely on per-cell data to catch a drifting cell before a trip goes wrong.
The honest read: Bluetooth earns its keep when the battery sits out of sight and you want a state-of-charge reading without a multimeter. It adds nothing when the battery is in plain view. Several reviewers also report app connection frustration, so treat it as a convenience rather than a deciding factor. If you want the data without an app, the non-Bluetooth batteries in this guide are all solid.
Enclosures and warranty protection
Forum users raise warranty denial more than any other concern, and the pattern is consistent. Claims get denied when a battery is repeatedly exposed to water or standing moisture. One widely shared video message from owners is blunt about it: the battery got too wet, and you need a waterproof box or protected placement to keep coverage alive.
That means a Group 31 or Group 24 battery box with a lid, positioned away from swamping points, drains, and dock contact. Sealing terminals with heat-shrink and a corrosion inhibitor covers the other half of the exposure problem. Note also that these batteries are for energy storage only, and using one for engine starting or as a golf cart battery voids coverage by definition.
Understand what voids a warranty
Before you buy, read the exclusions. In this group those exclusions consistently include cranking or starting duty, use with a non-lithium charger, physical damage from a battery box that is too small, and water exposure from an unsealed location.
Warranty length is also a quality signal worth weighing. The batteries here run from one year on the BtrPower 50Ah to five years on the LiTime, Redodo, Power Queen, SUPER EMPOWER, HeyFuture, and Dyness. Longer coverage usually signals a manufacturer that expects a longer service life and has parts and support to back it.
Weight savings and total cost
The weight difference is not marginal. A 100Ah LiFePO4 battery here weighs 20.9 to 24 lbs depending on the model, against roughly 60 lbs for a comparable flooded lead-acid pack. On a boat that means easier launching, better balance in a beam wind, and room in the compartment for a second bank or a tackle center.
On cost, the comparison is about cycles rather than purchase price. A battery rated at 4,000 cycles to 100% depth of discharge costs far more per usable cycle than one rated at 6,000, and a pack that lasts ten seasons beats one replaced three times. Budget brands cluster around similar cell chemistry, which is why forum users argue about charger quality and warranty service rather than core performance.
It is worth being precise about the term here, because lithium does not mean one thing. LiFePO4, lithium iron phosphate, is the chemistry in every battery reviewed above, and it is the safest and most durable lithium option for marine use. Other lithium chemistries exist for smaller devices, and our guide to lithium supplements covers a different context entirely. When you read a battery listing, confirm it says LiFePO4 rather than a generic lithium label.
Frequently Asked Questions
Is a 100Ah lithium battery enough for a trolling motor?
Yes for a 30-70 lb thrust motor on typical inland fishing. A 100Ah LiFePO4 battery delivers roughly 80Ah usable, which is about four hours at a 20A draw or eight hours at 10A. It is marginal for 80 lb thrust and insufficient for 100 lb plus offshore work.
Do lithium batteries damage trolling motors?
No. Motors respond to voltage and current, not chemistry. A lithium battery will not damage a trolling motor as long as the voltage is matched to the motor and the battery management system is working. Damage comes from voltage mismatch, a failed BMS, or chronic undercharging with a lead-acid charger.
How long will a 100Ah battery run a 55lb trolling motor?
Divide usable amp hours by average current draw. At about 80% usable capacity, a 100Ah lithium battery holds roughly 80Ah. A 55 lb motor averaging 20A gets around four hours of runtime, and at 10A it gets closer to eight hours.
What lithium battery does Minn Kota recommend?
Trolling motor manufacturers do not endorse specific battery brands. What they require is a LiFePO4 deep-cycle battery matched to the motor voltage, 12V, 24V, or 36V, with a functioning battery management system. Any of the Group 31 or Group 24 batteries in this guide will meet those requirements.
What size lithium battery is best for a trolling motor?
For a 30-50 lb thrust motor, a 50Ah battery is enough for kayak and small-boat fishing. For a 55-70 lb motor fishing all day, 100Ah is the right call. For 80 lb and above, go to 100Ah in a 24V or 36V bank sized by total watt hours rather than a single amp hour figure.
What are the key differences between a deep cycle marine battery and a lithium-ion marine battery?
A deep cycle marine battery is a category that includes flooded, AGM, and gel lead-acid plus lithium. The real difference is usable capacity and weight. Lead-acid gives about 50% usable capacity and weighs far more, while LiFePO4 gives 80-90% usable capacity at roughly a third the weight and lasts several times longer in cycles.
Conclusion: Our Top Trolling Motor Battery Picks in 2026
After working through all ten, the LiTime 12V 100Ah Bluetooth is the best lithium battery for trolling motors overall. It pairs the highest rating in the group with the second-largest owner base, holds a Group 31 footprint at 22.2 lbs, and gives you the app data most anglers end up relying on.
For pure value, the Redodo 12V 100Ah matches it on weight and footprint with far more owner feedback. Salt water anglers and big-thrust setups should take the Power Queen for its surge protection and ABYC E-13 rating, while small boats and kayaks should start with the 11 lb BtrPower 50Ah.
Whichever you choose, match the voltage, buy a real LiFePO4 charger, and mount the battery in a proper box. Those three decisions decide whether the warranty still works for you five years from now.