janv. 1997Sanyo Electric Co., Ltd.Battery charging apparatus, power supply, and attachment for connecting different types of battery packs to a battery chargerUS5621299 *14 nov. 199415 avr. 1997David A. KrallRechargeable battery power supply with load voltage sensing, selectable output voltage and a wrist restUS5691623 *18 mars 199425 nov. 1997Tsantilis; EleftheriosBattery charging system, steppin