This type of saw is a perfect tool to cut many kinds of materials. The saw has a voltage of 18 volts and weighs 2.6 kg, so it's not that heavy to carry around.
From ManoMano
Te-cs 18/165-1 Li-Solo Power X-Change Circular Saw 18V Bare Unit EINTECS18165 - Einhell
This product is also available at 2 unverified stores.