High Capacity: No longer to worry about the endurance of the batteries, Kastar high capacity battery will provide ultra strong power for your devices to performance well and operate longer. Battery Specification: Battery Type: Ni-MH; Battery Voltage: 3.6V; Battery Capacity: 1000mAh; Battery Dimensions: 44.5 x 30.5 x 10.16mm (1.75" x 1.2" x 0.4"); Package Includes: 2-Pack Battery. Safety Assurance: Kastar add mix-protection additive to the cathode of batteries, protect the material from degradation in the progress of charge and discharge, extend lifespan up to 1200 cycles. Low self-discharge: Embedded seal structure expand the space of crystal lattice, make more room for hydrogen, so Kastar batteries will holds power longer than others. Environmental Protection: Ni-MH eco-friendly cell, doesn't contain Hg/Cd/Pb, makes no pollution to the environment, and using DBCK steel shell which can protect the battery against explosion due to overpressure.