Rayovac Rechargeable Nickel Metal Hydride (Ni-MH) Batteries are high capacity, long lasting batteries designed for use in high tech devices that drain batteries quickly, such as digital cameras, MP3 players, PDAs, walkie-talkies, and portable CD players. These batteries may be recharged as many as 1,000 times. Unlike Nickel Cadmium (Ni-Cd) batteries these batteries have no "memory" issues, meaning that they can be recharged any time, even if just partially drained.
Rechargeable Ni-MH Batteries must be charged before first use, and for maximum performance should be recharged if stored for more than one week.