Maximizing Battery Discharge Time The battery charges whether the device is off or in use, but it charges faster when the device is off. Charging may take longer if a battery is new, has been unused for 2 weeks or more, or is much warmer or cooler than room temperature. Page 26 The device takes the following actions for a critical battery level: To reduce the risk of losing information when the device reaches a critical battery level and has[…]