Who's got a Battery powered push mower? Any worth a hoot?

My neighbor lady had an electric mower to mow her yard about a 20 min job front and back. Had it a few years and she dumped it for a gas mower. Said it wasn’t powerful enough.
It must've been a early crappy model, i have no problem cutting tall grass, i get through the front and back yard on one battery and 11/2 battery when i don't cut it for 2 weeks or it's been heavy rains.