Hitech - 4 AA Ni-Mh 2500mAh Rechargeable Batteries for Kids' Toys & Electronic Learning System 4-pack Hitech rechargeable AA rechargeable batteries Capacity: 2500mAh (the higher capacity of battery, the longer running time it powers your devices) Voltage: 1.2V; Chemistry: Ni-Mh Charges up to 300 times and cost saving than alkaline batteries Great for electronic kids toys & electronic learning system like Leapster Handheld and Vtech Kids