Abstract: A pronounced heat-diffusing action for a battery pack, which has a plurality of battery cells (2) located in a housing (1), is created by shaping the wall of the housing (1) surrounding the battery cells (2) such that this wall forms at least one duct (3, 4) for a heat-diffusing medium, which duct is closed off from the interior of the housing (1).

Abstract: A device for locking, an electrical device to an accessory part has a guide configured to guide the accessory part in a predetermined movement direction as it moves between a locking position in which it is locked the electrical device and a removal position in which it is removed from the electrical device, the guide having a break in at least one location between the locking position and removal position, and at the location a force acting on the accessory part moves the accessory part into a safety position in which the accessory part is prevented from moving further along the guide into the removal position.

Abstract: A battery pack for supplying power to an electrical appliance, in particular a power tool, has a housing which at least partly comprises plastic and holds at least one battery cell, wherein the plastic is a polyethylene (PE) with a density of more than 0.

Abstract: A battery pack for battery-operated hand power tools has a housing, a plurality of battery cells arranged in the housing and containing an electrolyte, a material arranged in the housing and capable of absorbing the electrolyte which escapes from the battery cells, the material being a material which chemically reacts with the electrolyte or parts of the electrolyte to form one or several such compounds which substantially are not damaging for humans and/or environment.