Patent ID: 7205901

Claim:
A removable battery system having a low battery detection circuitry and an audible alarm, said system comprising: a first battery receiver and a second battery receiver, each of the first and second battery receivers adapted to receive a battery therein and being electrically coupled to the low battery detection circuitry and the audible alarm, at least one of the batteries received in the first and second battery receivers providing constant power to the low battery detection circuitry and the audible alarm; a cover being selectively movable to provide access to the first and second battery receivers; and a locking mechanism coupled to the first and second battery receivers; wherein upon failure of one of the batteries received in the first and second battery receivers that provides constant power to the low battery detection circuitry and the audible alarm, the low battery detection circuitry sounds the audible alarm and selectively activates the locking mechanism to prohibit movement of the cover of the receiver containing a working battery until said failed battery is replaced.