A standby battery for an electric, portable device which can be easily transported with the device and supplies uninterrupted power when a main cell exhausts

摘要

A standby battery of an electric device is disclosed. The standby battery is appended to electric devices. The standby battery is formed by a housing and a plurality of cells in the housing, or is formed by a plurality of cells which are embedded in a groove of an electric device. In using the electric device, one cell is used as a main cell for supplying power. When the power of the main cell is exhausted, then other cells are used to replace the main cell. Thereby, power can be supplied uninterruptedly. Furthermore, the user has time to supply power to the cells. Moreover, the battery can be taken out with the electric device and thus the replacing the battery can be done easily. The battery can be used in other portable devices other than a mobile phone.