Powerex MHR84VI Imedion 8.4V 250mAh 1-Pack Rechargeable Battery

The Powerex MHR84VI IMEDION "Ready When You Are!" Rechargeable NiMH Battery (8.4V, 250mAh) is a nickel-metal hydride battery compatible with Powerex's MH- C1090F 10-Bank Charger or MH-C490F Stealth Charger. It is rated at a voltage of 8.4V and a capacity of 250mAh, with a minimum capacity of 230mAh. The battery is capable of being stored for an extended period of time and still retaining a full or nearly full charge. After a year, for instance, it will retain 85% of its capacity. The battery comes pre-charged. The purchase of an NiMH battery like this one saves you money, since you won't need to buy endless supplies of non-rechargeable alkaline batteries.