[jyl]

I use a battery electric mower for my small lawn. Cuts fine for the most part, no fuss, adequate battery capacity, struggles a bit if the grass gets too high (8") but two passes gets it done. But it is a small yard - I used to use a reel (manual) mower.

I've never run out the battery, but I know it will get through at least 2000 sq ft of grass (my "yard" plus the neighbors). Maybe there are some actual battery life specs for these mowers, but anyway that's my experience.

I also have battery trimmer and hedge clippers. They do the job, for a short time. I think Chris' 20 minutes is about right. These aren't really 100% satisfactory, but the alternatives (corded, gas) are a pain in their own ways.