As I begin to approach middle-age, there seem to be some things I don't recall the way I used to.

Isn't there something about battery 'memory?' That is, that batteries, if left below certain levels won't return to a full charge?

Maybe that's just for certain kinds of batteries?

We were told once that it was a good idea from time to time to fully cycle the batteries from low to full charge. Maybe that was hogwash?