The saw is battery-powered, so make sure to charge it. The saw has a voltage of 20 volts and weighs in at 4.18 kg, so it should work for everyday use.
From Homebase
Worx WX531 20v 2.0Ah Worxsaw Cordless Brushless Circular Saw
ITS
Worx WX531 20V Cordless Brushless 120mm Circular Saw with 1 x 2.0Ah Battery and Charger