Patent ID: 7433182

Claim:
A plug-and-expand battery module, comprising: a first expandable battery module including at least one battery cell therein; a first plug member provided on the first expandable battery module, adapted to be selectively inserted into a power input of a portable electronic apparatus or a second socket member of a second expandable battery module; a first socket member provided on the first expandable battery module, adapted to be inserted by a second plug member of the second expandable battery module; a battery connecting circuit for connecting the battery cells in the first expandable battery module to the first plug member and the first socket member; wherein the first plug member of the first expandable battery module has a dimension substantially same to the second plug member of the second expandable battery module, and the first socket member of the first expandable battery module has a dimension substantially same to the second socket member of the second expandable battery module; whereby when the first socket member of the first expandable battery module is inserted by the second plug member of the second expandable battery module, a power energy supplied by the first expandable battery module and the second expandable battery module is supplied to the first plug member of the first expandable battery module.