Sofirn AAA NiMh 1100mAh Rechargeable Batteries High Capacity Pre-charged Batteries Set With 1000 Cycle 4 Pack High Capacity: 1100mAh (milliamp-hour), min 1000mAh, Ni-MH pre-charged rechargeable batteries Recharge up to 1000 times; Pre-Charged in factory No memory effect - batteries can be recharged when fully, or partially discharged Eco-friendly cell Ni-MH, doesn't contain Hg/Cd/Pb, and makes no pollution to the environment No Leaks Guarantee: Use anticorrosive steel shell which can protect the battery against explosion due to overpressure.