[fnimick]

I wouldn't recommend this personally, having had bad experiences with poor charge circuitry in integrated chargers like these (in my case it was in a 18650 battery). Get a good charger (e.g. eneloop), and then you can get generic rechargeable batteries incredibly inexpensively for it, without risking poor charge management causing overheating or battery failure.

[_carbyau_]

The same little charger circuit built into the batteries also converts the lithium battery chemistry voltage to 1.5v making them a drop in replacement for AA and AA batteries.

Or are you saying you can get 1.5V lithium rechargables that work with an external charger?