Abstract: A method performed by a charging device may include detecting a presence of an external device connected to a secondary side of the charging device and setting a switch on a primary side of the charging device to an off state when a presence of an external device is not detected.

Abstract: A battery charger (10) comprising a housing (15) enclosing battery charging electronics (11), an interface (12) connectable to a mains outlet, and a charging current output interface. An aperture (71) is formed in a wall (75) of the housing, and a pressure relief valve (90) is arranged in said aperture, functioning to open and evacuate gas from the interior of the housing to the exterior of the housing when the pressure in the housing exceeds a pressure limit relative the exterior of the housing. In one embodiment, a bushing (90) for a cable (80) interconnecting the battery charging electronics (11) and the charging current output interface acts as the valve.

Abstract: A battery charger (10) comprising a housing (15) enclosing battery charging electronics (11), an interface (12) connectable to a mains outlet, and a charging current output interface. An aperture (71) is formed in a wall (75) of the housing, and a pressure relief valve (90) is arranged in said aperture, functioning to open and evacuate gas from the interior of the housing to the exterior of the housing when the pressure in the housing exceeds a pressure limit relative the exterior of the housing. In one embodiment, a bushing (90) for a cable (80) interconnecting the battery charging electronics (11) and the charging current output interface acts as the valve.

Abstract: A method performed by a charging device may include detecting a presence of an external device connected to a secondary side of the charging device and setting a switch on a primary side of the charging device to an off state when a presence of an external device is not detected.

Abstract: An outer portion of an electronic device has an uneven profile to aid in the dissipation of heat. Raised points in the uneven profile may be manufactured with a non-thermal conductive coating. In one implementation, the outer portion of the device includes a thermally conductive layer having an uneven surface and at least one other surface that is thermally coupled with a heat source. The uneven surface includes high areas that are higher than other areas of the uneven surface. A number of non-thermally conductive second layer areas are located on the high areas of the thermally conductive surface.