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Deep Cycle Lithium Batteries

New Arrivals, Engine Starting, Marine, Deep Cycle, and more.

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Deep Cycle Lithium Batteries

Deep Cycle Lithium Batteries

Fleet Lithium Deep Cycle Batteries deliver reliable, long-lasting power for marine trolling motors, RVs, solar storage systems, and off-grid applications. Built with premium LiFePO4 cells and our proprietary NexGEN BMS, our deep cycle lithium batteries offer up to 5x longer cycle life than traditional lead-acid batteries — with zero maintenance, faster recharge times, and significantly less weight.

Whether you're running a trolling motor all day on the water, powering your RV off-grid, or storing solar energy, Fleet Lithium deep cycle batteries are engineered to perform when it matters most. Every battery is backed by our 10-year warranty, built-in fire suppression, self-heating cold weather protection, and 24/7 live tech support.

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Let customers speak for us

from 111 reviews
Lee L.
Easy installation and great technical support

Easy installation and great technical support.

Fleet Lithium - High Performance Lithium Batteries
4 AWG Battery Cable Set (Pair)
Frank K.
Cabels look great

Cabels look great. Will be installing them by the end of the week. Frank

4 AWG Battery Cable Set (Pair)
EZGO TXT / RXV (2010-2021) 48V Lithium Battery Conversion Kit — Fleet Lithium
Anonymous
Install went quick and easy

Install went quick and easy.
The kit included everything I needed.
And my cart has more power and holds a charge for days instead of hours

EZGO TXT / RXV (2010-2021) 48V Lithium Battery Conversion Kit — Fleet Lithium
76.8V 105Ah Fleet Lithium Battery Bundle — NexGen BMS
Michael R.
This is a very high quality battery easy to install

This is a very high quality battery easy to install, so happy to be rid of the nasty corrosive lead cell batteries. Hopefully I’ll get many years of service out this battery and I’m sure I will, just the getting rid of the lead cell maintenance is a huge win. The cost of corroded cables, hold down brackets and adding water was a pain in the butt.

76.8V 105Ah Fleet Lithium Battery Bundle — NexGen BMS
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
RYAN B.
Ranger EV, HUGE upgrade

Nice and easy install, they work great, much longer range and way better power. Best of all, NO MAINTENANCE

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Textron / Tracker Prowler EV (2017-2021) (72V) Fleet Lithium Conversion Kit
Brent E.
Worth the money

Tried cheaper lithium setups first and they couldn’t handle the amp draw. This one has been solid with no issues.

Textron / Tracker Prowler EV (2017-2021) (72V) Fleet Lithium Conversion Kit
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Parker N.
Absolutely Incredible Range

Absolutely Incredible Range. We replaced our 4 year old Trojan batteries this spring with the 210 AH dual battery kit and we are blown away! We use the buggy to secure the perimeter of a 300 acre lot in South Carolina. We typically put about 200 miles per week on this unit. We have been testing this kit for about a month now and we are getting every bit of 80 miles per charge. Its absolutely unbelievable. Thank you Fleet Lithium!

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Digital 5" LCD Cluster Display — Icon, Kandi, Vivid, Kodiak, Curtis
Mary
This screen was so easy to install

This screen was so easy to install. We installed our fleet lithium battery about 2 years ago, the screen just came out in April, it took 10 minutes to install and everything works perfectly. Thank you Fleet lithium!

Digital 5" LCD Cluster Display — Icon, Kandi, Vivid, Kodiak, Curtis
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Nick P.
Worth it after months

After a few months of use I can confidently say this was worth it. No maintenance, great range, and consistent power every time. Huge upgrade from stock.

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Textron / Tracker Prowler EV (2017-2021) (72V) Fleet Lithium Conversion Kit
James C.
Real world performance

I should have just bought this first instead of wasting money on others.

Textron / Tracker Prowler EV (2017-2021) (72V) Fleet Lithium Conversion Kit
Club Car Onward (48V & 72V) (2017–Present) Fleet Lithium Conversion Kit
Daniel S.
Solid choice for golf carts

The range has doubled compared to my old setup. Installation was straightforward and the instructions were clear. I can now play multiple rounds without recharging.

Club Car Onward (48V & 72V) (2017–Present) Fleet Lithium Conversion Kit
Textron / Tracker Prowler EV (2017-2021) (72V) Fleet Lithium Conversion Kit
Steve D.
Strong upgrade

Real world use, not just cruising. This battery actually performs.

Textron / Tracker Prowler EV (2017-2021) (72V) Fleet Lithium Conversion Kit
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Margaret F.
Great value and power

I love the Bluetooth monitoring features. No more voltage sag even on steep hills. It's a night and day difference from lead-acid batteries.

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
William O.
Amazing results with this kit

Installation was straightforward and the instructions were clear. No more voltage sag even on steep hills. The battery runs cooler and is much lighter than my old one.

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Trevor Y.
Exceeded expectations

This kit exceeded my expectations. The Ranger runs smoother, quieter, and more efficiently. Would absolutely buy again.

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)

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