Charging indicator blinks rapidly and battery does not gain charge.

Safety: Do not attempt to force-charge or open the battery.

• Cool down: If the battery is warm, let it cool to room temperature and try charging again.
• Check environment: Charge only in a dry, moderate-temperature room.
• Try a different outlet/charger: Rule out charger issues.

If rapid blinking continues and the battery will not charge, replace the battery pack. Dispose of the old pack according to local regulations.