Circular saws have one blade mounted right on the axle of the engine. The saw has a voltage of 240 volts and weighs in at two kg, so it should work for everyday use.
From Amazon
Einhell TC-CS 89 Mini Circular Saw | 600W, Tool-Free Cutting Depth Adjustment to Max. 27 mm | Compact Hand-Held Cutting Tool With 2 x Saw Blades (Wood/Plastic,) 1 x Diamond Cutting Wheel
This product is also available at 2 unverified merchants.