Vacuum will not charge; charger LED may blink and app or display shows E5 battery protection error.

Safety first: Unplug the charger from the wall before inspecting.

• Check that you are using the original Roidmi power adapter or an approved replacement with the correct voltage and current rating.
• Inspect the charger cable and plug for cuts, kinks, or burn marks. Replace the charger/power adapter if damaged.
• Ensure the charging contacts on the wall mount or handle are clean and free of oxidation. Wipe with a dry cloth.
• Move the charger and vacuum to a cool, dry room (10–30°C) and let the battery rest for 30 minutes, then try charging again.
• If E5 persists and the battery will not accept charge, the internal BMS has likely locked out the pack. Replace the complete battery pack; do not attempt to open or repair the pack.