A method for sensing detachment of a external battery in a portable terminal including a connector with which the external battery is detachably assembled includes determining that the external battery is assembled with the connector when an output voltage is observed, connecting the connector and an...http://www.google.es/patents/US7834581?utm_source=gb-gplus-sharePatente US7834581 - Apparatus and method for sensing attachment or detachment of battery in portable terminal
Apparatus and method for sensing attachment or detachment of battery in ...
