Not charging

Possible causes

General, component-based causes – not a manufacturer-specific statement.

• Faulty charger or charger cable
• Damaged/corroded charging socket
• BMS charge protection (temperature, cell voltage)

Safe test steps

• Charger open-circuit output vs. its label value.
• Does pack voltage rise while charging (measure after 5–10 min)?
• Charging socket contacts, polarity, mechanical damage.

Workshop reference values

• Li-ion charger final voltage: S × 4.20 V (e.g. 10S → 42.0 V); tolerance typically ±1 %.
• Charging temperature: most Li-ion cells must not be charged below 0 °C (per datasheet).

Repair approach

• Replace the charger with an approved one of the same voltage.
• Replace the charging socket/cable.

Tools needed

• Digital multimeter (CAT III, fused inputs)
• Basic hand tools, insulated screwdrivers