| 摘要 |
Disclosed is a power-source battery unit to be attached detachably to a cellular phone for radio transmission/reception. This battery unit has: a battery cover with which a battery cell is covered; a first card mounting part formed in the battery cover; and a plug-in size IC card attached detachably to the first card mounting part. When the battery unit is attached to the cellular phone, the terminal of the IC card attached to the first card mounting part is electrically connected to the cellular phone side. |
