Never used one, contemplating it now, unsure of their usage as the wiki seems a little unclear.
Do I charge it with 60k power then it only refills my drill once before being empty? Wouldn't that be a loss compared to 10k batteries? Or will it fill my drill 6x?
Can I charge it inside a Batbox even though a Batbox only has 40k power? Will it just siphon the rest of it until its full?