This lawn mower from Einhell is battery-powered, a great choice for you with a small or medium-sized lawn.
From Amazon
Einhell Power X-Change 36/43 Cordless Lawnmower With Battery (x2) and Charger (x2) - 36V, 43cm Cutting Width, 63L Grass Box, 6 Cutting Heights, Mulching - GE-CM 43 Li M Battery Lawn Mower Red / Black
Freemans
Einhell PXC Cordless Lawn Mower 43
This product is also available at 5 unverified merchants.