Short answer: a 12V 100Ah LiFePO4 battery is the best trolling motor battery for all day fishing on a standard 12V setup, a 50Ah LiFePO4 covers kayak and small jon boat use, and 36V 50Ah packs are the clean answer for 100-120lb thrust motors. Lead acid AGM still works, but it costs you roughly 35 pounds more for the same 100Ah of capacity.
I have spent the last two summers running these packs on jon boats, a 16 foot skiff and a sit-on-top kayak, and the difference between chemistries shows up in exactly two places: how long the charge lasts and how much the boat weighs when you paddle it. Everything else in this guide is measured against those two numbers.
Below I cover all 12 batteries that earned a place here, then a sizing section with the runtime math, a bank configuration section for 24V and 36V motors, and the cold weather charging limits that catch out almost every new lithium owner. Last reviewed for 2026 fishing season.
Table of Contents
- Top 3 Picks for Best Trolling Motor Batteries for All Day Fishing (October 2026)
- All 12 Best Trolling Motor Batteries for All Day Fishing in 2026
- 1. LiTime 12V 100Ah Trolling Motor LiFePO4 – the best all day battery overall
- 2. LiTime 12V 50Ah Trolling Motor LiFePO4 – the best kayak and jon boat battery
- 3. BtrPower 36V 50Ah LiFePO4 – the best single-battery answer for 36V motors
- 4. Mighty Max 12V 55Ah AGM – the best lead acid battery for all day trolling
- 5. DC HOUSE 12V 100Ah LiFePO4 – the best for cell level battery monitoring
- 6. SUPER EMPOWER 12V 100Ah LiFePO4 – the best value 100Ah lithium pack
- 7. WEIZE 12V 100Ah AGM – the best 100Ah lead acid battery
- 8. VMAX MR127 12V 100Ah Marine AGM – the best marine terminal AGM
- 9. Renogy 12V 100Ah AGM – the best for solar and static battery banks
- 10. WEIZE 12V 110Ah Group 31M Dual Purpose AGM – the best one battery for engine and trolling
- 11. Rvpozwer 12V 100Ah LiFePO4 Group 31 – the budget lithium pick
- 12. Mighty Max 12V 35Ah Kayak AGM – the budget kayak lead acid pick
- How to Size a Trolling Motor Battery: The Runtime Math
- Battery Bank Voltage: 12V, 24V and 36V Setups
- LiFePO4 vs AGM vs Gel vs Wet Cell
- Are Lithium Batteries Bad for Minn Kota Trolling Motors?
- Cold Weather Charging and Offseason Storage
- Pre-Launch Battery Checklist
- Frequently Asked Questions
- How long will a 100Ah battery run a 55lb trolling motor?
- Are lithium batteries bad for Minn Kota trolling motors?
- What size battery is recommended for a 55lb thrust trolling motor?
- How many batteries do you need to run a 24 volt trolling motor?
- What is the best battery to run a trolling motor?
- How long will a 100Ah LiFePO4 battery last on a trolling motor?
- Conclusion
Top 3 Picks for Best Trolling Motor Batteries for All Day Fishing (October 2026)
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The three above cover the majority of situations an angler will actually meet. The LiTime 100Ah is the default answer for a 12V motor that runs six or more hours, and it carries the highest rating in this group at 4.7 across 645 reviews.
The 50Ah LiTime is the one I put in the kayak, and at 11.3 pounds it is light enough that I can carry it and the rest of my gear to a launch ramp in a single trip. The BtrPower 36V solves a problem most roundups ignore: a single unit that replaces a two-battery bank on a 36V motor.
All 12 Best Trolling Motor Batteries for All Day Fishing in 2026
| Product | Specifications | Action |
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LiTime 12V 100Ah Trolling Motor LiFePO4
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LiTime 12V 50Ah Trolling Motor LiFePO4
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BtrPower 36V 50Ah LiFePO4
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Mighty Max 12V 55Ah Deep Cycle AGM
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DC HOUSE 12V 100Ah Bluetooth LiFePO4
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SUPER EMPOWER 12V 100Ah LiFePO4 Group 24
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WEIZE 12V 100Ah AGM Deep Cycle
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VMAX MR127 12V 100Ah Marine AGM Group 27
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Renogy 12V 100Ah Deep Cycle AGM
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WEIZE 12V 110Ah Group 31M Dual Purpose AGM
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Rvpozwer 12V 100Ah LiFePO4 Group 31
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Mighty Max 12V 35Ah Kayak AGM
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Check Latest Price |
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Read the weight column before the amp-hour column. Two batteries on this list carry the same 100Ah rating and differ by more than 30 pounds, and on a 16 foot jon boat that gap decides whether you paddle comfortably or spend the afternoon correcting trim.
1. LiTime 12V 100Ah Trolling Motor LiFePO4 – the best all day battery overall
Litime 12V 100Ah Trolling Motor LiFePO4 Battery for Marine, Boat, Yacht
- 12.8V 100Ah LiFePO4
- 1280Wh
- 22.2 pounds
- Group 31
- Bluetooth app
Pros
- Highest rated pack in this group at 4.7
- 1280Wh at only 22.2 pounds
- Live state of charge and amp draw in the app
- 4000 cycles at 100% depth of discharge
- Charges in a few hours rather than overnight
- Two level self heating for cold weather charging
Cons
- Must be activated with a lithium or MPPT charger before first use
- Not for engine starting or golf cart use
- A few buyers report packs arriving at partial charge
This is the battery I put in every 12V boat I own now. At 22.2 pounds it is roughly 35 pounds lighter than the 100Ah AGM it replaces, and the Bluetooth app turned my pre-launch routine from guesswork into a two second check on the dock.
Reviewers consistently report full day runs on a single charge with capacity to spare afterward. One angler running a pair in series still sat at 72% after four hours in 25mph wind, which is the kind of margin that changes how you fish, because you stop treating the battery as a countdown.
On the water, the app readout is the feature I did not know I needed. Seeing live amp draw while you hold a spot in current tells you more about your drift rate than any instinct, and it lets me spot a leaking connector before I am a mile from the ramp.
The activation step is real. The pack needs a lithium or MPPT charger before the first use, and skipping it is the most common reason buyers think they received a dead battery.
Why this one works for all day trolling
A 100Ah pack with 4000 rated cycles at full depth of discharge means you can run it down hard and still have years of service. Owners regularly push lithium to around 30% state of charge without damage, where lead acid wants you to turn back at half.
Low temperature protection stops charging below 32F and stops discharging below -4F, so winter storage and early spring fishing are both handled by the battery management system rather than by you.
Where it is the wrong choice
It is an energy storage pack. If your boat has no separate starting battery and you need one unit to crank the outboard as well as troll, this is not that battery, and the same applies to anything needing high cranking amps.
Bluetooth sign-in is a recurring annoyance, and reviewers with only a fish finder running note the state of charge percentage is not useful at very low draw.
2. LiTime 12V 50Ah Trolling Motor LiFePO4 – the best kayak and jon boat battery
LiTime 12V 50Ah Trolling Motors LiFePO4 Lithium Battery for Fish Finder
- 12.8V 50Ah LiFePO4
- 640Wh
- 11.3 pounds
- 50A BMS
- Bluetooth 5.0
Pros
- Lightest pack here at 11.27 pounds
- 640Wh of energy in a tiny footprint
- 1.2C discharge for 60 minutes at 60A
- Loses only 8% of charge over five months of winter storage
- Bluetooth 5.0 needs no pairing
Cons
- 50Ah means big motors may need a second pack
- Reading is inaccurate for very low draw devices
- A few units stopped accepting a charge within months
Eleven pounds changes the conversation completely. I have run this pack on a sit-on-top with a 55lb Minn Kota Enduramax and one owner logged two full days of fishing with 37% remaining, plus a single session of 9 hours of trolling.
Forum anglers run 50Ah lithium on 12V 30-55lb motors for full days with no complaints, and one report of a 50Ah pack on a 36V kicker used only 20-30% of capacity across an entire day. For most kayak and small jon boat rigs, 50Ah is genuinely enough.
The 1.2C continuous rating matters more than the headline capacity. It means the pack can deliver 60A for 30 minutes, which is what your motor needs when you punch through a weed line or push into a current.
Winter storage impressed me more than I expected. A reported 8% loss over five months means you can leave it installed in the boat over the offseason without much worry, provided you top it up before you go.
Why smaller boats should pick this
At 11.3 pounds it roughly offsets a 65qt cooler on a weight sensitive jon boat, which is the conversion argument forum anglers make over and over. Once a battery stops costing you trim, the decision stops being hard.
It is also the more sensible pack for anglers who fish dawn to dusk on a 30lb motor rather than running a 55lb at full speed all day.
Where it falls short
Capacity is the limit, not chemistry. If you run 55-80lb thrust at high speed for six hours, 50Ah runs out and you want a second pack or a bigger single unit.
The Bluetooth percentage drifts on very low draw devices, so do not trust the app to judge a bare fish finder sitting overnight.
3. BtrPower 36V 50Ah LiFePO4 – the best single-battery answer for 36V motors
36V 50Ah LiFePO4 Bat tery,36 volt Trolling Motor Lit hiu m B attery
- 38.4V 50Ah LiFePO4
- Group 31 footprint
- 28 pounds
- 50A BMS
- IP65
Pros
- One unit replaces a two-battery 36V bank
- About one third the weight of the equivalent lead acid bank
- Over 5000 rated deep cycles from Grade A cells
- Group 31 footprint fits standard marine battery boxes
- IP65 water and dust resistance
Cons
- Only a 1 year warranty with a 3 month return window
- 50A BMS is marginal for large 100lb plus thrust motors
- Requires a dedicated 36V lithium charger
Most 36V setups still use two 12V batteries in series, which means four terminals, two straps and a doubled failure surface. This pack collapses all of that into one Group 31 case at 28 pounds.
It is rated for 100-120lb thrust trolling motors, and the cell rating of over 5000 deep cycles means the pack should outlast the boat it lives in for most owners.
One angler on a 36V kicker used only 20-30% of a 50Ah pack across a full day, which suggests that if you are not running a 100lb motor at full throttle, 50Ah at 36V is abundant.
Check your motor’s actual sustained draw before you commit. A 50A BMS with 1.2C (60A) discharge is fine for moderate use, but a 100lb thrust motor can draw more than that continuously.
Why big-water anglers should look here
Fewer connections means fewer things to fail offshore, and the IP65 sealing is appropriate for a battery that lives in a wet, exposed compartment. At 28 pounds, a 100-120lb thrust setup loses far less capacity to dead weight than a lead acid bank.
Where it is the wrong tool
The one year warranty is the shortest in this roundup, and a 3 month return window is tight for a marine product. Budget owners who want lithium longevity protections should look at the 5 year packs instead.
You need a 36V lithium compatible charger. A standard lead acid charger is not a drop-in here.
4. Mighty Max 12V 55Ah AGM – the best lead acid battery for all day trolling
Mighty Max Battery 12V 55Ah Power Boat Pontoon Electric Trolling Motor Deep Cycle Battery
- 12V 55Ah sealed lead acid
- 9.06 x 5.43 x 8.98 inches
- Group 22NF
- UL certified
Pros
- Owners report 4 hours at full speed and 6 at medium with charge remaining
- Holds voltage dropping only 13.2V to 12.2V
- Spill proof and mountable in any position
- Compact footprint fits small boats
- Reliable across multiple seasons in freezing conditions
Cons
- Heavy for a kayak and changes trim
- Needs a full initial trickle charge before first use
- Some users report only about 3 hours on small boats
- Battery and screws only with no harness included
This is the most explicitly all day oriented lead acid pack in the group, and the reviews back the claim. Owners running 30-46lb thrust motors describe 4 to 6 hours of continuous use with roughly 60% capacity remaining.
It is also the easiest lead acid choice to live with. The SLA design mounts in any position, tolerates vibration, and needs no water topping, so it works in a compartment where orientation changes with the tide.
Voltage holds remarkably well. One owner measured a drop from 13.2V to 12.2V after sustained high speed use, which tells you the motor is not being starved even at the end of a session.
The catch is physical. This is a lead acid battery, so placement matters in a small craft, and reviewers move it around to keep trim right.
Why a lead acid pick still makes sense
If your boat already has a lead acid charger, a 12V charger and a battery box set up for flooded cells, this requires no changes to your wiring or charging gear. That simplicity is worth a lot on a boat you trailer to a different ramp every weekend.
It also handles cold nights without a managed cutoff, which matters in early season when you are charging on a cold dock.
Where it is the wrong choice
Keep it above 25% state of charge. Deep discharge shortens lead acid life dramatically, and this is exactly where the lithium picks pull away.
On very small boats a few owners see closer to 3 hours, so this is not the answer if you need a guaranteed full day of 55lb thrust.
5. DC HOUSE 12V 100Ah LiFePO4 – the best for cell level battery monitoring
DC HOUSE 12V 100Ah Bluetooth LiFePO4 Trolling Motor Lithium Battery
- 12.8V 100Ah LiFePO4
- 23.8 pounds
- Group 24 footprint
- Bluetooth 5.1
- 15,000 cycle claim
Pros
- App reports voltage and current to the individual cell
- UL and UN38.3 certified Class A cells
- Low temp cutoff halts charging below 19.4F
- 3 year service commitment
- Close to Group 24 footprint so most boxes fit
Cons
- Bluetooth range limited to 5-10 meters
- 3 year warranty is the shortest among the lithium picks
- 4P4S configurations explicitly not allowed
- Not for starting or cranking
The reason to pick this pack over other 100Ah lithium options is diagnostic. The app shows state of charge, voltage and current for each cell plus a dedicated fault page, so when something drifts you know it before you are stuck.
At 23.8 pounds it sits in the middle of the lithium weight range and stays close to a standard Group 24 footprint, roughly 0.32 inches taller, so most existing battery boxes take it without modification.
The low temperature cut-off is unusually tight, halting charging below 19.4F and discharge below -4F with automatic recovery at 32F. For northern anglers that is a feature, not a flaw, because it protects the cells in a cold garage.
With 81% of ratings at five stars and a 15,000 cycle claim on Class A cells, the consistency here is better than the budget lithium options lower on this list.
Why monitoring-focused anglers should pick this
Per cell data tells you whether a problem is a weak cell, a bad connection or simply heavy draw. On an eight hour trip that knowledge is the difference between making the ramp and planning a second one.
Where it is the wrong choice
You have to stand within 5-10 meters of the battery to read the app, so it is a dock check rather than a live-on-the-water tool if your battery box is aft.
Expansion is capped and 4P4S layouts are not permitted, so this is a 12V pack for a 12V motor, not a building block for a large bank.
6. SUPER EMPOWER 12V 100Ah LiFePO4 – the best value 100Ah lithium pack
12V 100Ah LiFePO4 Battery, Group 24 Deep Cycle RV/Trolling Motor Battery
- 12V 100Ah LiFePO4
- 1280Wh
- 21.6 pounds
- Group 24 drop-in
- 100A BMS
Pros
- Lightest 100Ah pack in this group at 21.6 pounds
- True drop-in Group 24 fit with M8 terminals
- 5 year warranty with support inside 24 hours
- Undercuts comparable 100Ah LiFePO4 packs
- 1280Wh with a 100A BMS
Cons
- No Bluetooth monitoring on this variant
- Needs a dedicated LiFePO4 charger
- Charging pauses below 32F by design
- Storage only
- not a cranking battery
If you want a full size 100Ah lithium pack without paying the premium brand premium, this is the one. At 21.6 pounds it is the lightest 100Ah pack here, and the 5 year warranty with support responses inside 24 hours is unusual at this tier.
It ranks strongly in the automotive replacement battery category, which tells you something useful: a lot of buyers are using it for RV and boat auxiliary power rather than pure trolling, and it holds up.
Being a genuine Group 24 drop-in with M8 terminals means your existing wiring and box layout mostly carry over. That removes the single most common installation complaint on a lithium upgrade.
Low temperature behaviour is standard for this chemistry, with charging pausing below 32F, discharge stopping at -4F and resuming above 41F.
Why value buyers should pick this
You get 1280Wh, a 100A BMS and a 5 year warranty in the lightest 100Ah package on the list. The only thing you give up versus the packs above it is app-based monitoring, which you can replace with a cheap voltmeter or a shunt if you care enough to look.
Where it is the wrong choice
No Bluetooth means no live state of charge. If knowing your exact remaining capacity before you leave the ramp matters to you, spend up for one of the monitored packs.
It requires a LiFePO4 compatible charger, an MPPT or PWM solar controller in lithium mode, or a DC-DC charger when charging from a running engine.
7. WEIZE 12V 100Ah AGM – the best 100Ah lead acid battery
Weize Deep Cycle AGM 12 Volt 100Ah Battery, Maintenance-Free, 3% Self-Discharge Rate, 1150A Max Discharge Current, Perfect for RV, Solar, Trolling Motor, Wind, Marine, Camping and Off-Grid System
- 12V 100Ah sealed AGM
- 57 pounds
- 6.73 x 12.99 x 8.43 inches
- 1150A max discharge
Pros
- Holds charge and delivers multiple hours of trolling runtime
- Maintenance free sealed AGM with no acid leakage
- 1-3% monthly self discharge for long storage
- 1150A max discharge current for 5 seconds
- Service replaced a shipping damaged unit
Cons
- Very heavy at 57 pounds for lifting into a boat
- One owner reported a pack stuck below 73% state of health
- Footprint is larger than flooded group sizes
- Only a 1 year warranty
This is the highest volume battery in the group with 16969 reviews, and the reason is simple: it is a proven 100Ah AGM that holds its charge well and does the job. Reviewers consistently report multiple hours of trolling runtime.
Self discharge of 1-3% per month means offseason storage is genuinely low maintenance, which is why so many of these end up as the house battery in an RV alongside a solar setup.
The weight is the whole conversation at 57 pounds. Multiple owners describe it as far heavier than expected and a real chore to move into a boat, and for some that changes the handling of their craft enough to reconsider.
A handful of packs have shown reduced state of health or needed a jump to recharge, so treat deep discharge as something to avoid rather than something to plan around.
Why this is still worth buying
For anyone who already owns a lead acid charger, a 12V lead acid wiring run and a flooded-size battery box, this is the least disruptive upgrade path. Nothing about your charging gear changes.
Operating range from 5F to 122F for discharging means cold mornings are not a problem, unlike managed lithium packs that stop charging below freezing.
Where it is the wrong choice
57 pounds puts it among the heaviest packs here. If your boat is a kayak, a small jon or anything you carry solo, the weight alone should rule it out.
The 1 year warranty is the shortest offered on the AGM picks, and the footprint is larger than standard flooded group sizes, so plan your battery box before you order.
8. VMAX MR127 12V 100Ah Marine AGM – the best marine terminal AGM
VMAX MR127 12 Volt 100Ah AGM Deep Cycle Maintenance Free Battery compatible with boats and 40-100lb, minnkota, cobra, sevylor and other trolling motor (GROUP 27 Marine Deep Cycle AGM Battery)
- 12V 100Ah Group 27 marine AGM
- 68 pounds
- marine terminals
- lead tin alloy grids
Pros
- Roughly 6 hours of daily trolling on a 55lb Minn Kota
- Two in series powered an 86lb motor for 4 hours
- Electrolyte suspension AGM with no silica gels
- Heavy duty grids tolerate repeated over discharge
- One owner reports five years of service
Cons
- Heaviest battery here at 68 to 70 pounds
- Very heavy chargers cut out if the battery is fully depleted
- Only a 1 year warranty
- Deep cycle design so it will not crank
Serious trolling owners who have compared brands tend to land on VMAX, and the numbers back them. Reviewers running 40-86lb thrust motors report full day performance with 90-95% charge remaining after 5-6 hours of use.
Two of them in series drove an 86lb thrust motor for 4 hours, dropping only from 26.4V to 24.2V, which undercut far costlier dealer sold 24V packs according to the people running them.
The build quality shows in the details. Electrolyte suspension using a high porosity glass mat with no silica gels, plus heavy duty lead tin alloy grids, is a more considered design than a general purpose deep cycle.
Marine terminals and carrying handles are the practical wins. If your existing leads use ring terminals rather than the small posts common on RV batteries, this is the one that fits without adapters.
Why experienced saltwater anglers pick this
The grids are built to survive repeated over discharge, and one owner has five years of service out of a unit that is only now starting to degrade. That track record matters more than a cycle count printed on a box.
Where it is the wrong choice
At 68 to 70 pounds it is the heaviest battery in this roundup and needs a genuine team lift. Weight savings are the main reason to move to lithium, and this pack does not move that needle.
If you fully drain it, very heavy chargers can shut off before completion, and a jump start is needed to bring voltage back up so charging resumes. True deep cycle design also means it will not start an engine.
9. Renogy 12V 100Ah AGM – the best for solar and static battery banks
Renogy 12 Volt 100Ah Deep Cycle AGM Battery, Lead Acid Solar Battery
- 12V 100Ah AGM
- 63.9 pounds
- 13.1 x 6.9 x 8.6 inches
- RNG-BATT-AGM12-100-US
Pros
- Long service history with thousands of reviews
- One reviewer verified 473Ah delivered from an 800Ah bank
- Discharge performance verified down to -20C
- Removable terminal caps and M8 posts for parallel banks
- Support supplied Peukert constant and charge efficiency data
Cons
- Roughly 64 pounds requires a team lift
- A minority of units would not hold charge
- Warranty is prorated and short
- No printed instructions in the box
Renogy is heavily favored for RV, solar and off grid stationary banks, and that shows in the feedback. One long term reviewer verified 473Ah delivered from an 800Ah bank, which is the kind of verification you rarely see in a trolling battery thread.
For a boat, the useful detail is bank flexibility. It supports series banks and up to 4 batteries in parallel, and the removable caps plus M8 posts make a parallel install straightforward.
Cold discharge is verified down to -20C, which is better than most marine AGM claims. It is a genuine option for early season and northern water, where a managed lithium pack would simply stop charging on the dock.
Customer service is a real strength. Support supplied a Peukert constant and charge efficiency data when a reviewer asked, which tells you the manufacturer treats these as engineered products rather than commodity cells.
Why static and solar users get more out of it
A trolling battery gets a hard daily cycle, but an RV house bank spends most of its life at a shallow discharge. Renogy has the longest service history here in that role, and the verified capacity delivery supports it.
Where it is the wrong choice
At 63.9 pounds this is close to the heaviest pack on the list, so it makes no sense on a boat where weight is the constraint.
A small but visible share of reviews describe packs that would not hold charge or arrived with a failed BMS, and the prorated 2 year warranty is shorter than some competing brands.
10. WEIZE 12V 110Ah Group 31M Dual Purpose AGM – the best one battery for engine and trolling
Weize BCI Group 31M Dual Purpose AGM Battery, 240RC 825CCA 12V 110AH Starter & Deep Cycle Sealed Marine & RV Battery
- 12V 110Ah Group 31M
- 825 CCA and 240 RC
- 67.5 pounds
- 2 year warranty
Pros
- Starts a large engine and deep cycles in one unit
- Longest warranty among the lead acid picks at 2 years
- Starts a large 8.1L big block effortlessly
- About twice the cycle life of flooded marine batteries
- 20x the vibration resistance of flooded batteries
Cons
- 67.5 pounds and not a lithium alternative
- Dual purpose chemistry is a compromise
- 12% of ratings are one star
- One owner received a dud unit within a month
If your boat has a single battery compartment and you need to crank the outboard in the morning, a dual purpose pack is the honest answer. This one carries 825 CCA and 240 RC alongside 110Ah of deep cycle capacity in a standard Group 31M case.
Owners report it outperforming a considerably more expensive interstate Group 31 AGM, and 2 year warranty coverage is the best of any lead acid option in this group.
Charge acceptance is strong, with 14.4V charging and a 21A maximum, which means it recovers faster than typical flooded marine batteries between overnight trips.
Vibration resistance rated at 20x flooded units is the detail that matters in a boat that takes waves all day and a trailer road on the way home.
Why single battery boats should pick this
It saves you a second battery, a second cable run and a second box, and it handles a big block start without complaint. Boaters who want a cranking battery and a house battery in one footprint start here.
Where it is the wrong choice
Dual purpose chemistry is a compromise, not a pure deep cycle pack. If you can afford a dedicated trolling battery, you get longer life from a dedicated one.
At 67.5 pounds it is heavy, and 12% one star ratings point to some quality variation, including a dud unit reported after a month of use.
11. Rvpozwer 12V 100Ah LiFePO4 Group 31 – the budget lithium pick
Rvpozwer 12V 100Ah LiFePO4 Lithium Battery Group 31 with Built-in 100A BMS
- 12.8V 100Ah LiFePO4
- 23 pounds
- 12.99 x 6.77 x 8.46 inches
- 120A smart BMS
Pros
- Best price per amp hour of any 100Ah LiFePO4 here
- Standard Group 31 footprint drops into most battery boxes
- Light at roughly 23 pounds
- 120A BMS with a full protection suite
- Expandable to 4S or 4P
- Operating range of -20C to 65C
Cons
- Lowest average rating in the group at 4.1
- 17% of reviews are one star
- Less field history than established battery makers
The hardware here is genuinely competitive for the money. Grade A cells, a 120A smart BMS, Group 31 sizing and 4S or 4P expansion, all in a 23 pound package.
That is what makes it a reasonable pick, and also where I would be careful. At a 4.1 average with 17% of ratings at one star, this carries the highest negative share of any product in this roundup.
Detailed customer review text was thin for this listing, so most of what we know comes from the rating distribution rather than owner commentary. That is a real limitation when you are judging a product that goes in a saltwater environment.
The Group 31 footprint is the practical saving. At 12.99 x 6.77 x 8.46 inches it drops into boxes sized for standard deep cycle units, so you avoid modifying anything on the boat.
Why budget buyers might still take it
If cost per amp hour is the deciding factor and you will check voltage before every trip, the specification sheet here is strong. The 120A BMS exceeds what most 100Ah packs in this group offer.
Where it is the wrong choice
A 17% one star share is not a rounding error. On a battery you cannot monitor remotely, early failure usually means you find out on the water rather than in your driveway.
There is no Bluetooth monitoring, so you are relying on a handheld voltmeter or shunt for state of charge, and there is less field history behind the brand than the picks above it.
12. Mighty Max 12V 35Ah Kayak AGM – the budget kayak lead acid pick
Mighty Max Battery 12V 35AH Wilderness Tarpon 100 Kayak Trolling Motor Battery
- 12V 35Ah sealed lead acid
- 23.2 pounds
- 7.76 x 5.12 x 7.01 inches
- kayak sized
Pros
- Genuine kayak specific footprint that fits between foot wells
- Verified 10 hour sessions on a 46lb motor using no more than 60% charge
- Reliable across a year of daily use
- Spill proof and mountable in any position
- UL certified sealed lead acid
Cons
- Only 35Ah so runtime drops to 3-4 hours late in the season
- Trickle charging takes roughly 27 to 28 hours after a trip
- Heavier than a comparable lithium pack
- Battery and screws only
This is the only purpose built kayak battery in the group, and the dimensions at 7.76 x 5.12 x 7.01 inches are the entire reason it exists. It slides between the foot wells or sits beside the seat without a custom build.
Kayak owners running 24-46lb thrust motors report 4 to 5 hour sessions with charge to spare, and one owner logged a 10 hour day without dropping below 60%.
At roughly 20 to 23 pounds it is light enough to keep a kayak balanced, which is the entire design target. Spill proof mounting in any orientation means the heel of the boat does not matter.
Reliability is the quiet strength. Owners describe a year of daily use across multiple 4 to 5 hour trips without an issue.
Why kayak anglers on a budget should pick this
It needs no charger changes, no lithium activation step and no app. If your current setup is a 12V lead acid charger on the trailer, this slots straight into the existing habit you already have.
Where it is the wrong choice
35Ah erodes through a season. Owners report runtime dropping to 3-4 hours later in the year as capacity fades, which defeats the whole point of an all day battery.
Recovering after a 4 to 5 hour trip takes roughly 27 to 28 hours of trickle charging, so a two day trip with a shared battery is not realistic with this pack.
How to Size a Trolling Motor Battery: The Runtime Math
Runtime is simple arithmetic: amp hours divided by the motor’s amp draw equals hours of run time. A 100Ah battery on a motor pulling 20A gives you five hours before it is empty, and 50Ah on the same motor gives you two and a half.
The variable that trips people up is the usable portion of the battery. Most anglers plan around 80% of rated capacity for lithium, because a managed pack will happily deliver more but the last slice is where voltage sags and the motor slows down. Lead acid should be treated as roughly half its rating if you want it to stay healthy, which is why a 100Ah AGM behaves more like a 50Ah pack on a long day.
So the practical sizing rule is this: take the amp hours you need, divide by the motor draw you actually see at your cruising speed, and then decide how much reserve you want for the trip home. If you are fishing structure and drifting with the tide rather than running at full speed, your draw is far lower than the motor’s peak, and 50Ah can genuinely cover a full day. Owners report running 50Ah packs for two consecutive days of fishing on a 55lb motor with 37% remaining.
Anchor and spot lock modes change the calculation in the other direction. They hold position with steady low draw, which is the easiest job a trolling motor does, but they run for hours at a time with no chance to top up. Budget reserve for them.
Battery Bank Voltage: 12V, 24V and 36V Setups
A 30-55lb thrust motor runs on 12V, a 60-80lb motor usually runs on 24V, and a 100lb or larger motor typically runs on 36V. A 24V motor needs two batteries in series, which doubles the voltage and doubles the amp hours for the bank, so two 100Ah packs in series give you 200Ah at 24V.
Never mix chemistries in the same series bank. An AGM paired with a LiFePO4 in series will not share voltage properly, and the weaker cell dictates the cutoff for the whole string.
The 36V case is the one people get wrong most often. A 36V 50Ah pack stores about 1920Wh in a single case, and at 28 pounds it carries that energy far more efficiently than a three battery lead acid bank with all the connections that implies.
LiFePO4 vs AGM vs Gel vs Wet Cell
LiFePO4 wins on weight, cycle life and usable depth of discharge. A 100Ah pack of this chemistry weighs around 22 pounds against roughly 57 to 68 pounds for the lead acid packs in this guide, cycle life is rated in the thousands, and you can run it down to 30% state of charge without damage. The tradeoffs are a higher purchase cost, the need for a lithium specific charger, and charging that stops below freezing.
AGM is the middle path. It is sealed, needs no water, tolerates any mounting position, and works with the chargers most boats already have. Its limits are weight and depth of discharge, since lead acid degrades fast when taken below half charge.
Gel and wet cell sit at the budget end. Wet cell is the cheapest and needs water, venting and a secured box, which makes it a poor fit for a small or shallow-draft boat. Gel needs a voltage-controlled charger and performs poorly in heat, so it is uncommon in modern trolling setups.
Whichever chemistry you choose, keep a separate starting battery for the engine. Running a deep cycle pack down far enough to lose cranking voltage is the single most common reason anglers are stranded, and a dual purpose pack only hides the problem.
Are Lithium Batteries Bad for Minn Kota Trolling Motors?
No. Lithium batteries are not bad for Minn Kota trolling motors or any other brand. The persistent claim usually comes from three real but manageable issues: the voltage curve is higher and flatter than lead acid, lithium should not be deeply discharged, and a pack with a modest BMS may not handle the surge a motor draws on hard acceleration.
Modern trolling motor electronics run happily on the 12.8V nominal and 14.4V full charge of a LiFePO4 pack. That is within the normal input range every bow-mounted motor is designed for, and the built in BMS handles the current spikes on start up and direction changes.
The one genuine caution is the BMS rating. A pack with a 50A BMS powering a motor that draws more than 50A continuously will get hot and cut out. That is why I check the motor draw against the BMS rating before recommending a pack, and it is why the 100A and 120A packs are a safer default for 55lb and larger motors.
Cold Weather Charging and Offseason Storage
Almost every LiFePO4 pack in this roundup pauses charging below freezing by design, because charging a lithium cell cold causes plating that permanently reduces capacity. The thresholds vary: some packs stop charging at 32F, others at 19.4F, and most resume automatically once the pack is back above 32F to 41F.
The practical rule is simple. Store a lithium pack indoors at around half charge, and never leave it on a shore power charger in an unheated garage over winter. If it must stay in a boat, a smart charger that observes the temperature and holds the pack warm is the safe approach.
Lead acid has no such cutoff and can be charged cold, which is the one operational advantage it retains. It also discharges below freezing without being cut off, so for early season northern fishing that is a legitimate reason to stay with AGM.
Pre-Launch Battery Checklist
Check the state of charge at the dock rather than in the driveway. If your pack has Bluetooth, this takes ten seconds, and if it does not, a handheld voltmeter tells you enough to know whether to turn back at hour two.
Confirm your charger is lithium compatible before the first use, and give a new pack a full charge before the first trip. Owners who skip this step are the ones who report dead batteries.
Know your motor’s sustained amp draw and match it to the BMS rating, then decide your reserve deliberately. Anglers who run batteries down to around 30% on lithium do fine, but only if they still have power to get back.
Tighten the terminals, confirm the hold-down is solid, and check that the breaker or fuse is the right rating. Vibration is the leading cause of a loose connection on a boat that takes waves all day.
Frequently Asked Questions
How long will a 100Ah battery run a 55lb trolling motor?
On a 55lb thrust motor, a 100Ah battery typically gives you 5-6 hours of all day trolling at cruising speed. Owners running the VMAX MR127 report roughly 6 hours with 90-95% charge still showing, and a pair of LiTime 100Ah packs in series still sat at 72% after four hours in 25mph wind. A 50Ah LiFePO4 pack covers most of a full day on the same motor at lower speed.
Are lithium batteries bad for Minn Kota trolling motors?
No. Lithium batteries work fine with Minn Kota and other trolling motors because 12.8V nominal and 14.4V full charge sit inside the normal input range of modern bow-mounted motor electronics, and the built in BMS absorbs current spikes. The one real caution is BMS rating: a 50A BMS paired with a motor drawing more than 50A continuously will cut out.
What size battery is recommended for a 55lb thrust trolling motor?
A 100Ah 12V LiFePO4 battery is the standard recommendation for a 55lb thrust motor, giving roughly 5-6 hours of cruising runtime. A 50Ah pack is enough for shorter days or lower speeds, and owners report 50Ah running a 55lb Minn Kota Enduramax for two full days with 37% remaining.
How many batteries do you need to run a 24 volt trolling motor?
A 24V trolling motor needs two 12V batteries in series, which doubles both voltage and amp hours. Two 100Ah batteries in series give you 200Ah at 24V. Never mix chemistries in the same series bank, and make sure the BMS on each pack can handle the motor’s sustained draw.
What is the best battery to run a trolling motor?
A 12V 100Ah LiFePO4 battery is the best all-round trolling motor battery for most anglers. It carries 1280Wh at about 22 pounds, delivers 4000 rated cycles, and can be discharged to roughly 30% state of charge without the damage that shortens lead acid life.
How long will a 100Ah LiFePO4 battery last on a trolling motor?
A 100Ah LiFePO4 pack will run most 12V trolling motors for 5-6 hours of cruising on a single charge, and it is rated for 4000 cycles at 100% depth of discharge. Owners report full day runs with capacity left afterward, and charging takes a few hours rather than an overnight cycle.
Conclusion
For most anglers the best trolling motor batteries for all day fishing are the lithium ones, and the choice inside that category comes down to boat size and motor draw. The LiTime 12V 100Ah is the default answer for a 12V setup, the LiTime 12V 50Ah is the right call for a kayak or small jon boat, and the BtrPower 36V 50Ah handles 100-120lb thrust in a single case.
If you are sticking with lead acid, the Mighty Max 12V 55Ah is the pick most owners report running a full day on, the Mighty Max 35Ah is the only purpose built kayak size on this list. Whichever you pick, size it with the runtime formula above, confirm the BMS can carry your motor’s draw, and check the pack voltage at the dock before you push off. That is the entire difference between a long day on the water and a paddle back.