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Fleet Lithium

Lithium Power Built to Drop In

LiFePO4 packs, complete conversion kits, matched chargers and hardware for carts, UTVs, boats, coaches and off-grid systems — all built and supported in the USA.

  • Drop-in packs and complete conversion kits
  • 300A continuous, 800A peak surge
  • Matched lithium chargers and OE-fit hardware
  • Warranty coverage listed per product, ships from the USA
300A Continuous discharge
5,000+ Cycles at 80% DoD
Warranty Listed per product
Fleet Lithium 12V 100ah Fleet Lithium Engine Starting (Group 27) battery angled to show the top terminals, product labels, and side warnings.
105Ah Best selling capacity
  • Drop-in fitment
  • Matched chargers
  • US-based support
  • Ships from the USA
  • Warranty coverage
1

Pick your application

Cart, UTV, marine, RV or off-grid — each has its own pack and hardware set.

2

Confirm fitment

Run your make, model and year through the finder before ordering.

3

Add the right charger

Every lithium pack needs a lithium charge profile.

View as

Verified fitment

Find the right pack for your vehicle

Pick your make, model and year and we will show only the packs and kits verified to fit.

  • EZGO
  • Club Car
  • Yamaha
  • Icon
  • Advanced EV
  • Textron
  • Polaris

Vehicle not listed? Send us the model and year and our team will confirm fitment before you order.

Buyer questions

Fleet Lithium FAQ

Why LiFePO4 instead of lead-acid?
Lithium gives you roughly triple the usable capacity at half the weight, holds voltage under load, needs no watering and lasts five to ten times as many cycles.
Do I need a different charger?
Yes. Lead-acid chargers do not follow a lithium charge profile. Conversion kits include a matched lithium charger; standalone packs list the correct one.
Will a pack fit my vehicle?
Use the fitment finder to confirm the bracket and harness for your exact make, model and year before ordering.
How long do the batteries last?
Promise series packs are rated for 5,000+ cycles at 80% depth of discharge — about a decade of normal use.
What does the BMS protect against?
Over-charge, over-discharge, over-current, short circuit, cell imbalance and out-of-range temperature, plus low-temperature charge protection on high-tier packs.
What warranty is included?
Promise series packs carry a 10-year warranty with US-based support. Other lines carry 8- or 5-year terms listed on each product page.
Talk to a specialist