Rechargeable batteries are powerful & durable. Quick & 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 & 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).