How Long Do LiFePO4 Batteries Last?
By Frank Zale · September 4, 2026 · 2 min read
A good LiFePO4 battery lasts 3,000 to 5,000+ charge cycles, which for most van lifers means 8 to 15 years of daily use. That's five to ten times longer than lead-acid, and it's the main reason lithium is cheaper in the long run despite the higher sticker price.
Lifespan by battery type
| Type | Cycles | Years at 1 cycle/day |
|---|---|---|
| Flooded lead-acid | ~400 | ~1 year |
| AGM | ~500 | ~1.5 years |
| LiFePO4 | 3,000–5,000+ | 8–15 years |
A "cycle" is one full discharge and recharge. Partial discharges count as partial cycles, so real-world life is often even longer.
Why LiFePO4 lasts so long
- It tolerates being deeply discharged (80%+) without harm — lead-acid degrades fast if you do that.
- Stable chemistry with slow capacity fade.
- A good BMS keeps the cells balanced and protected.
What shortens lithium life
- Charging below freezing — the fastest way to permanently damage cells (details here).
- Constant 100% full + heat — storing hot and full ages any battery faster.
- A weak BMS — cheap batteries with poor management don't last.
The real cost story
Lithium costs more upfront but far less per cycle. Over a van's life you might buy one LiFePO4 battery versus five or more AGMs. That's why the cost breakdown and battery-type comparison both land on lithium for anyone using their van seriously.
Make yours last
- Keep it above freezing before charging
- Avoid storing it hot and 100% full for long periods
- Buy a battery with a reputable BMS
Then size it right the first time with the free calculator so it's never overstressed.
FAQ
How long do LiFePO4 batteries last?
Typically 3,000–5,000+ charge cycles, or roughly 8–15 years at one cycle per day — five to ten times longer than lead-acid.
What kills a LiFePO4 battery early?
Charging below freezing (permanent damage), long-term storage while hot and full, and a poor-quality BMS. Avoid these and lithium lasts a very long time.
Is lithium worth it over AGM despite the price?
Usually yes — you may buy one LiFePO4 in the time you'd replace AGM five times, making lithium cheaper per cycle over the life of the van.