Ebike battery problems
Battery is the single biggest cause of ebike reliability problems. Chargers fail, cells go out of balance, BMS boards trip. Each failure mode below walks you through diagnosis + fix.
Battery problems
Battery won't charge
Diagnose charger, cell balance, BMS trip in 5 minutes.
Range dramatically dropped
Cell balance check + BMS calibration. When the battery is actually dying.
Battery swelling or leaking
STOP RIDING. Safety guide first, replacement guidance after.
Multimeter testing your battery
How to measure voltage, open-circuit, under-load. £15 tool, 2-minute check.