A portion of a layout of a single layer of an integrated circuit is to be multi-patterned. A simple, robust and compact assembly suitable for HF applications for such a surge arrester arrangement is achieved, whereby the switch mechanism reacts reversibly to the heat generated in the surge arrester by the current flow. The internet protocol phone further communicates with a second server to receive LAN switch information for the internet protocol phone. A transmitter transmits the desired welding operational parameters to a receiver disposed in the power source. The method includes electrically coupling n batteries to form a string of batteries, electrically coupling n battery charger assemblies to the n batteries such that each respective battery charger assembly is coupled to an anode and a cathode of a respective battery, and charging the plurality of batteries utilizing the n battery charger assemblies. Methods for bubble-free, automatic or manual filling of the cylinderpiston unit, also at atmospheric pressure are also disclosed.