The GP130AAH/T is a tagged rechargeable nickel metal hydride battery and is a cylindrical AA in size. Note these cells are flat top industrial cells and are designed for battery packs.
These batteries are made to the highest quality standards and have the additional benefit of being qualified to the UL standard for product safety. This makes them the ideal choice when you are using these cells in battery packs.
The cells are nominally 1.2V, have a typical capacity of 1300mAh. They should give you around 500 charge and discharge cycles.