Patent attributes
A battery-powered electronic device, such as an electronic hearing protector (100) includes a housing (113) enclosing the battery and an electronics assembly powered by the battery, the electronics assembly comprises a processor controlled by updatable software. The device further includes a first electrical contact (119a) that is a ground line; a second electrical contact (119b) that is a data programming line in a first state, and that is a charging voltage line in a second state; and a third electrical contact (119c) that is a clock line in a first state, and that is a charge enable line in the second state. The first, second and third electrical contacts (119a-c) are accessible from outside the housing (113). A switch enclosed by the housing (113) changes the second electrical contact (119b) between the first state and the second state.
