Patent ID: 7786700
Filing Date: 2010-08-31
Classification: G01R,H02J

Abstract:
1. A battery-powered apparatus comprising: a recessed connection section to which either of a battery pack or an accessory having another recessed connection section for receiving another battery pack therein is attachable; a determining unit adapted to determine whether the battery pack is directly attached to the recessed connection section or the accessory having the another recessed connection section receiving the another battery pack therein is attached to the recessed connection section; a setting unit adapted to set a predetermined voltage threshold level based on a result of the determining unit; a detecting unit adapted to detect a voltage value output from the battery pack directly attached to the recessed connection section or the accessory having the another battery therein; and a deciding unit adapted to decide whether or not the battery-powered apparatus is drivable, based on the voltage value detected by the detecting unit, wherein the setting unit sets the predetermined voltage threshold level to a first threshold level when the determining unit determines that the battery pack is directly attached to the recessed connection section, and sets the predetermined voltage threshold level to a second threshold level when the determining unit determines that the accessory having the another recessed connection section receiving the another battery pack therein is attached to the recessed connection section, the second threshold level being lower than the first threshold level, and being set based on an impedance from the another recessed connection section of the accessory to the recessed connection section.