I've looked around a bit to find this and haven't found anything about it, but when I upgraded to an OV Scanner after draining it looking for ore I could not recharge it.
I tried using a RE Battery in my hand, a batbox, even sticking it in my generator and I could not restart it. It wasn't until I stuck it inside of my Miner and started mining that it actually recharged. I haven't checked against since then however, so I'm not sure if it's still bugged like that.
When I crafted the OV Scanner and began using it I was wearing a batpack,so it might be related to that. Maybe it flagged itself as taking power from my batpack even though it wasn't?
Also, an unrelated note: The Geothermal generator is very laggy, to the point that as soon as I drain all the power from it I will be removing it until the next update.