LiFePO4 Battery
Also known as: LFP battery, lithium iron phosphate, lithium leisure battery
Lithium iron phosphate — the lithium chemistry used in modern leisure batteries, prized for long cycle life, full usable capacity and thermal safety.
Official source: Fogstar — Drift 105Ah spec (3,500+ cycles @ 80% DoD, 10-year warranty, ~10 kg) →
LiFePO4 (lithium iron phosphate, sometimes 'LFP') is the lithium chemistry that has become the default for campervan leisure batteries. Compared with lead-acid it delivers almost all of its rated capacity (vs ~50% usable for lead-acid), weighs far less per usable kWh, and lasts thousands of cycles.
Real figures from the UK market show the scale: a Fogstar Drift 12V 105Ah is rated for 3,500+ cycles at 80% depth of discharge with a 10-year warranty, and weighs about 10 kg. The trade-off is cold: most LiFePO4 cells must not be charged below freezing, so winter vans use a self-heating model or keep the battery in the heated habitation space. A built-in BMS (battery management system) protects against over-charge, over-discharge and imbalance.
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