Battery remaining capacity indicating apparatus and battery remaining capacity indicating method

A battery remaining capacity indicating apparatus according to the present invention includes an end voltage corresponding accumulated value correction control means 21 for setting an accumulated value obtained after the battery was fully charged so that the accumulated value indicative of a remaining battery capacity of a lithium-ion secondary battery 14 reaches zero when an end voltage is a device side end voltage. It is determined whether or not a battery end voltage set by a discharge characteristic of the lithium-ion secondary battery 14 to end the discharging of the lithium-ion secondary battery 14 corresponds to a device side end voltage. If the battery side end voltage and the device side end voltage do not correspond to each other, then the accumulated value is corrected in response to the device side end voltage. A remaining battery capacity, corresponding to the device side end voltage, of the lithium-ion secondary battery 14 is calculated based on the accumulated value corrected by an end voltage setting unit 20 and a calculated remaining battery capacity is indicated on a liquid-crystal display device 5. If the set side end voltage and the battery side end voltage do not correspond to each other, then a battery remaining capacity, corresponding to the end voltage, of the battery side is indicated on the set side.