Rechargeable batteries are powerful and durable. Quick and easy to charge they can be charged hundreds of times to save money every time. Particularly well-suited for devices requiring high-energy development over a short time these batteries have far higher power reserves than standard alkaline manganese batteries. They are ideal for everything from digital cameras to portable cassette and CD players to notebook computers. When not in use they can hold their charge for up to 12 months. For best results pair your Recharge batteries with Energizer chargers (sold separately). Energizer Recharge Universal Rechargeable 9V Battery 1-Packs 24 / Carton (Quantity)