Duracell AA Rechargeable Battery long-lasting power with its advanced ion core technology. This battery comes pre-charged and is compatible with any NiMH charger, allowing you to recharge it up to 400 times. Designed to provide reliable performance for up to five years, it features Duralock Power Preserve Technology that holds a charge for up to one year when not in use. I for high-drain and frequently used devices such as video game controllers, wireless electronics, and baby monitors, this AA battery delivers a capacity of 2400 mAh and operates at 1.5 volts. Packaged in a convenient set of four, it ensures you have plenty of power ready whe you need it. Model Number: 66155