When the battery light starts flashing quickly during a cycle, this means your battery is low. Don't worry, the device is designed to perform a few cycles before it is fully discharged. You will find a battery charger in your device box, with an adapter. You can use it to charge your device. The battery light will continue to flash as the device charges. The light will stop flashing when the battery is fully charged. A fully charged battery will last one month if used twice per day or 2 months if only used once per day.