The mainsconnector/power supply is a special switch power pack, which can be used in place of the battery of a power tool. It is a low voltage source, with parameters matching those of the 25.2V battery. The switch power pack is designed for a power electric tool that works in the intermittent operation. The mains voltage and frequency information on the type plate must be observed before the device is connected to the mains power supply. The device is ready for operation after the power cable has been plugged in.