I've been using corded electric mowers and trimmers for a long time and will never go with the battery rip offs nor will I be going back to the hassles of gas powered mowers for the yard; still need a tractor and dragline for the back 20 acres. I hate screwing with the gas powered ones every spring, with the plugs, yanking on the pulley, keeping it oiled, etc.
I bought a cheapo $79 small electric from Ollie's that is super light, not very wide just for the front yard because it has a sharp slope over a third of it and my tractor would tip over if I tried to use it fo rthe front yard. I'm in my third season with it and it still works fine, paid for itself the first summer. 'summer' here is 6 to 10 months, depending on the weather patterns. So, don't be afraid to get an electric mower, and extension cords are a hassle but not near;y as much of a hassle as fighting with gas mowers all the time, dealing wit fuel, oil, fouled plugs, smoke, etc.
My neighbor sneered at my electric, thinks he's a 'manly man' or something for using a gasser, so now, every time I see him out in his yard cranking on his manly man 6 hp gas piece of shit about 30 times and playing with the choke I carry mine out of the shed using the handy handle over the deck, plug in a 100' extension cord and stand there starting and stopping mine just by pushing a button on and off over and over and over, lol drives him insane.