This 6.0vdc Ni-MH 2800mAh battery pack is made from five high capacity Sub-C cells and 18 gauge multi-conductor wire for the best power transfer possible. The quick connect plug makes it easy to retrofit these battery packs into your cool robot design. This pack weighs 9.34oz., about half the weight of an equivalent Ni-Cad pack, perfect for your walking or fighting robot. Note: These battery packs were rigorously tested with automated equipment that repeat the charge and discharge cycles, logging the capacity in mAh's. These battery packs routinely tested better than Sanyo packs, which cost three times as much.