operating parametersUS5325041 *Jan 21, 1993Jun 28, 1994Briggs James BAutomatic rechargeable battery monitoring systemUS5341084 *Dec 14, 1992Aug 23, 1994Fujitsu LimitedMethod and device for determining and indicating a residual capacity of a batteryEP0435317A2 *Dec 28, 1990Jul 3, 1991Kabushiki Kaisha ToshibaPersonal computer for performing charge and switching control of different types of battery