BATTERY CHARGERS; ELECTRICAL POWER SUPPLIES; ELECTROMAGNETIC TRANSFORMERS; ELECTROMAGNETIC COILS AND WINDINGS; ELECTROMAGNETIC COUPLING APPARATUS FOR TRANSFERRING ELECTRICAL POWER FROM A BASE UNIT TO A BATTERY-POWERED PORTABLE DEVICE; CORDLESS BATTERY CHARGERS FOR MOBILE BATTERY-POWERED DEVICES; VOLTAGE AND CURRENT MEASUREMENT CIRCUITS FOR BATTERY CHARGERS; VOLTAGE AND CURRENT MEASUREMENT CIRCUITS FOR ELECTRICAL POWER SUPPLIES; VOLTAGE AND CURRENT CONTROLLERS FOR BATTERY CHARGERS; VOLTAGE AND CURRENT CONTROLLERS FOR ELECTRICAL POWER SUPPLIES; PARTS AND ASSEMBLIES FOR ALL THE AFORESAID GOODS; ELECTRIC CELLS; ELECTRIC BATTERIES; BATTERY PACKS; ELECTRIC CELLS; ELECTRIC BATTERIES; BATTERY PACKS; ELECTRONIC AND ELECTRICAL CIRCUITS; INTEGRATED CIRCUITS; MICROPROCESSORS; MICROCHIPS; PRINTED CIRCUITS; COMPUTER PROGRAMS FOR THE CONTROL OF BATTERY CHARGERS; COMPUTER PROGRAMS FOR THE CONTROL OF ELECTRICAL POWER SUPPLIES; DATA CARRIERS PRE-RECORDED WITH COMPUTER PROGRAMS FOR THE CONTROL OF ELECTRICAL POWER SUPPLIES