The Powerex Precharged MHRAAP4 Rechargeable AA NiMH Batteries (1.2V, 2600mAh) - 4-Pack is a package of 4 AA nickel-metal hydride (NiMH) batteries.
They have a voltage of 1.2V and a capacity of 2600mAh, with a minimum capacity of 2450mAh.
The batteries are capable of being stored for an extended period of time...