Long-lasting power and innovation is what the Energizer Max family is all about. Energizer C batteries hold power for up to 10 years while in storage, so you have power when you need it most. When it comes to toys, digital cameras, and other valuable devices, you can feel confident knowing you have the long-lasting power and protection you expect from Energizer. Even fully used AA and AAA sizes are designed to protect your devices from leakage - for up to 2 years.