Devices with battery remaining capacity estimating functions

A device comprising:

• a processor;
• and
• a memory coupled to said processor, said memory comprising computer-readable instructions that, when executed by said processor, cause said processor to calculate a remaining capacity of said battery, to calculate a capacity ratio of the calculated remaining capacity to a capacity reference of said battery, to compare a parameter indicative of a status of said battery with a parameter reference to generate a first comparison result, to compare said capacity ratio with a ratio reference to generate a second comparison result, to set an amount according to said first and second comparison results, and to change said calculated remaining capacity by said amount.