So apparently my Aunt and Uncle had an electric push mower that quit working, they told me about it Sunday, and I picked it up today. It's a Black and Decker somethingorother, 24V.
Apparently it's either a board malfunction, or a fault. Not sure which. But one battery appears to be leaking. Not a big deal, I was expecting to replace it anyway. The batteries did spin the motor up when I jumped it.
My goal, hopefully, is to be able to get it running, toss it on the back of the 'mule, (which is how it made it's way home in the first place), and go mow peoples lawns. Maybe if I feel like getting fancy, I'll rig up a series/parallel relay so I can just hook it to the bike to charge on the go, in case I need to do multiple lawns in one day.
Best part is its a plastic deck, so no rust (except for parts of the handle).