Hitech - 4 Pack Ni-MH Replacement AA Batteries For Solar Lights and Other Devices - 2000mAh: Highest Capacity Solar Battery on Amazon 4-pack of Hitech rechargeable AA batteries Capacity: 2000mAh, low-self discharge - possibly the highest-capacity solar light battery you'll see Voltage: 1.2V; Chemistry: Ni-MH Charges up to 300 times before needing replacement. Saves money and the environment! Works in any lights that use rechargeable Ni-Cd or Ni-MH AA batteries, and many other devices