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12V & 24V deep cycle

Deep Cycle Lithium Batteries

12V and 24V LiFePO4 deep-cycle packs for house banks, trolling, off-grid and auxiliary systems. Full usable capacity instead of the half you get from lead-acid.

  • 100% usable capacity — no 50% depth-of-discharge penalty
  • Roughly half the weight of an equivalent AGM bank
  • Series and parallel capable for larger banks
  • 5,000+ cycles at 80% depth of discharge
100% Usable capacity
50%
5,000+ Cycles at 80% DoD
Deep Cycle Lithium Batteries
100Ah Best selling capacity
  • Full usable capacity
  • Lightweight
  • Series/parallel capable
  • Matched chargers
  • US-based support
1

Add up your daily draw

List every load in amp-hours per day, then size the bank to cover it with headroom.

2

Halve the lead-acid number

Lithium gives full usable capacity, so a 100Ah lithium replaces roughly a 200Ah lead-acid bank.

3

Match the charge source

Converter, alternator or solar controller all need a LiFePO4 profile.

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Buyer questions

Deep cycle FAQ

How much lithium replaces my lead-acid bank?
Roughly half the rated amp-hours. Lead-acid should only be drawn to 50%, lithium delivers its full rating.
Can I wire packs in series?
Series and parallel are supported on the models that state it on the product page. Always match capacity and state of charge before wiring.
Will my existing charger work?
Only if it has a LiFePO4 profile. Converters, alternator regulators and solar controllers all need lithium settings.
What about cold weather?
The BMS blocks charging below safe temperature. Choose a heated model if the bank charges in freezing conditions.
How long do they last?
5,000+ cycles at 80% depth of discharge — roughly a decade of normal seasonal use.
What warranty applies?
Terms are listed per line: 10 years on Promise series, 8 or 5 years on other lines.
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