Agreed on the greatness of Eneloop: I've used these in my Bluetooth keyboard and mouse for a few years now, and they also do a very neat USB-powered charger. (

Agreed on the greatness of Eneloop: I've used these in my Bluetooth keyboard and mouse for a few years now, and they also do a very neat USB-powered charger. (Other brands do low self-discharge MiMH batteries too -- e.g. Duracell -- but I've had much less luck with those).