I just read and those are not rechargeable either. Would have to find something else.
I actually bought some samller versions of Cr2 at a local battery shop... Lighthound.com. I was waiting for my ultrafire cr2 from china and couldnt wait so I got these unmarked "CR2s"... Little did I know they were actually 3.7v a peice... SERIOUS vapor and SERIOUSLY BAD TASTE.... However, it you take a 1-2 second pull off of them, they are actually pretty decent! I bet money they would fit in the protege and they are rechargeable! Lemmie digg a up a link.
RCR2 Unprotected Rechargeable Lithium Battery
These are 1 mm to large in diameter will not fit because the 14500 is tight.