Overview: Rechargeable Battery Capacity: 1800m Ah Voltage: 4.8 V Chemistry: Ni-MH (Nickel Metal Hydride) Rechargeable Times: Up to 1100 Times Memory effect: No Cadmium: Free Can be rapidly charged with any plug in charger, Exact replacement for standard AA size battery in all the devices. Package Included:4 x 1800 m Ah rechargeable batteries Specification: Weight Approx:65.3g Size Approx:16.5 x 4.8 x 1.5