How to charge LFP so it lasts: setpoints, current, and the habits that matter.
Charge voltage and current
Charge to 3.45–3.65V per cell and drop to a float well below it. Current matters less than the voltage ceiling.
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Habits: partial charge, storage and cycling
80–90% for daily use, 100% before a long run, half charge for storage. Those three habits cover most of the lifespan question.
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Questions
Short answers to the ones that come up most.
What voltage should I charge to?
3.45–3.65V per cell — about 14.2V for a 12V pack or 56.8V for a 48V pack.
Can I charge to 100% every day?
You can, but 80–90% for daily use and 100% before a long trip costs nothing and buys cycle life.
How do I store the pack?
About half charge, cool, disconnected. Never leave it flat.
