How should I charge the battery and balance the cells?

Slow charging is better (0.3–1 kW); use fast 3.3 kW when you need it at a race.

Balancing happens around 80% and while the bike sits after a full charge, so now and then leave it on the charger overnight or for a day. A working routine from the chat: keep it at 80%, and the night before a ride charge to 100% at 0.3 kW.

Cell difference

• up to ~0.010 V — normal
• 0.02 V — acceptable
• 0.05 V and above — needs balancing (24 hours at 0.5 kW brought 0.087 → 0.007 V)