Track saws have one advantage in that it can start cutting anywhere on the wood. It has a voltage of 240 volts and weighs 4.5 kg, so it's not that heavy to carry around.
From Amazon
Festool 576706 Plunge-Cut Saw TS 55 FEBQ-Plus 240V, 208.0 mm*331.0 mm*211.0 mm
This product is also available at 1 unverified merchant.