Reading a returned pack to find the real cause.
Opening a returned pack safely
Photograph before touching; discharge and isolate before opening.
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Common root causes
Water, over-current, wrong charger and loose connections account for most returns.
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LiFePO4 questions
Short answers to the ones that come up most.
What makes LiFePO4 different?
Lower energy density than NMC, far better stability and cycle life.
How long does a pack last?
4,000–6,000 cycles at 80% DOD.
Charge in the cold?
Not below 0°C without heating.
Maintenance?
Terminals, ventilation, BMS log.
Safe?
The safest lithium chemistry in wide use.
