Super Capacity - 2800mAh AA rechargeable batteries and 1100mAh AAA rechargeable batteries - the highest on.com Low self-discharge batteries will remain 90% juice when you leaving it for no use 1 year Embedded seal structure, ultra slim and make more inner space, DBCK steel shell can protect the battery against explosion due to overpressure. Batteries come with the storage case not only protect the batteries but also keep them tidy and safe 1.2V Ni-MH high quality cell, no memory effect, can be charged and used at anytime.