The fact that this power saw is battery-powered makes it very easy to bring with you. The saw has a voltage of 18 volts and weighs 3.3 kg, so it's not that heavy to carry around.
From Amazon
Makita DHS680RTJ 18V Li-ion LXT Brushless 165mm Circular Saw Complete with 2 x 5.0 Ah Batteries and Charger Supplied in a Makpac Case
Powertool World
Makita DHS680RTJ 18v Brushless Circular Saw 165mm Inc 2x 5.0Ah Batts
ITS
Makita DHS680RTJ 18V LXT Brushless 165mm Circular Saw with 2x 5.0Ah Batteries, Charger & Case