The Powerex Precharged Rechargeable C Batteries have a voltage of 1.2V and a capacity of 5000mAh, with a minimum capacity of 4500mAh. These batteries are capable of being stored for an extended period of time and still retaining a full or nearly full charge. After a year, for instance, they will retain up to 85% of their original capacity.

This product comes pre-charged and can be recharged up to hundreds of times. The purchase of NiMH batteries like these saves you money, since you won't need to buy endless supplies of non-rechargeable alkaline batteries.