Storacell by Powerpax SlimLine AA Battery Caddy, Black, Holds 4 Batteries

i got this since it seemed a nice way to organize my rechargeable batteries. in terms of knowing the state of the battery while it is in the caddy is as easy as changing the orientation of the battery while it is in the caddy. it also works well for keeping track of the non-rechargeable batteries that come with your devices.