Patent ID: 7555212

Claim:
A battery check device for a portable electronic apparatus, in which a plurality of types of batteries can be selectively mounted, said battery check device comprising: a battery determining processor that determines a type of battery, when said battery is mounted in said portable electronic apparatus; a battery check processor that checks the residual battery power in accordance with the determined battery type, for the mounted battery; an indicating processor that can indicate said plurality of types of batteries, said indicating processor indicating the determined battery type; a selecting processor that manually selects a type of battery to be mounted; and a decision processor that manually fixes the mounted battery type selected by said selecting processor, said indicating processor indicating that said portable electronic apparatus recognizes the determined battery type as the type of battery to be mounted, and that a battery type, other than the determined battery type, can be set as the mounted battery type by said selecting processor, wherein, only when an ending voltage of the determined battery type is not the lowest among said plurality of types of batteries, said selecting processor can select a type of battery that has an ending voltage lower than that of the determined battery type.