The Pearstone "C" Spacer with AA Battery (2 Pack) is a spacer kit allowing you to use AA batteries within a C battery shell. This will alter the dimensional characteristics of your battery, while allowing you to use more common and readily available AA batteries. This way you will always have sufficient power on hand to run your portable devices that run on C batteries.
The included 2300mAh AA NiMH batteries have an output voltage of 1.2V and are rechargeable up to 1000 cycles. In addition, these Pearstone batteries are mercury-free, making them eco-friendly.