Abstract: A unique method and apparatus for charging a battery enables the safe and efficient charging of a battery (102) which may be removed during charging. An electronic device (106) may not be adapted to be powered by the external power supply (114) without a detachable battery, or more importantly, the internal circuitry (200) may be damaged when the detachable battery is removed while the power supply is attached. Also, a battery may not be properly charged if a battery is replaced in the middle of a charging program for the battery. By periodically interrupting (306) the charging current, a device may turn itself off before circuitry or components are damaged if a battery is removed, and reset the charging program to correctly charge a battery if the battery is replaced.

Abstract: An EMI shielded keypad (10) or switch for a radiotelephone (50) has a non-conductive cover (12) attached to a printed circuit board (PCB) (14). The PCB (14) has a ground pad (20) and a plurality of metal traces (26) on a first surface (16) that attaches to the cover (12). The cover (12) is made of a flexible, preferably clear material, such as mylar and has a dimple (28) centered over the ground pad (20). A bubble (30) is centered over the plurality of conductive traces (26). A conductive coating (32) is selectively applied to the mating surface (34) of the cover (12), so that the conductive coating (32) in the bubble (30) is electrically isolated. By pressing on the bubble (30) electrically contact is established between the plurality of traces (26), thus the bubble and the traces (26) define a switch.