Most dad jokes here are old and stale, it's good to have one that's current.

This joke is both positive and negative at the same time

Shocking.

Yeah, there's a definite battery marketing push with all those sales going on. I was able to pick up some depleted batteries just the other day, free of charge.

Actually potential energy would be gravity, no?

Batteries are full of chemical energy, no?

But funny joke nontheless