Patent ID: 7649339

Claim:
A system for detecting a remaining battery capacity, comprising: an electronic device and a battery connected together including: a power supplying means for supplying power to the electronic device; a storage means for at least one of storing a battery-side end voltage which is set based on a discharge characteristic of the power supplying means and storing a device-side end voltage which ends operations of the electronic device; a sending means for at least one of sending an accumulated value indicating a remaining capacity of the power supplying means to the electronic device and sending the device-side end voltage stored on the storage means; a receiving means for at least one of receiving the device-side end voltage and receiving the accumulated value for indicating a remaining capacity of the battery from the battery; a control means for at least one of controlling correcting of the accumulated value based on the device-side end voltage received from the receiving means and the battery-side end voltage stored on the storage means, and send the corrected accumulated value to the electronic device and controlling displaying of the remaining capacity of the battery based on the accumulated value received from the battery; wherein the battery provides power to the electronic device and is capable of sending the accumulated value to the electronic device and the accumulated value is corrected based on the device-side end voltage which ends operations of the electronic device and the battery-side end voltage is set based on a discharge characteristic of the battery; and wherein the electronic device sends a device-side end voltage which ends operations of the electronic device to the battery device and calculates the remaining capacity of the battery device based on the accumulated value received from the electronic device.