"I'm getting older (67) and the gas one is just getting too hard for me to run."

Why is it too hard to run? I'm older than you (77) and my gas weed eater is easy to use. It starts on the 2nd pull after one pull with the choke on and it has a shoulder strap to support the weight. I thought about getting an electric weed eater but my yard is too big and I don't think it would have enough power. I also wondered how long the battery lasts and about how much it might cost to replace. My last gas weed eater lasted 18 years.