Panasonic Eneloop Pro AA 2550mAh 500 Cycle New High Capacity Ni-MH Pre-Charged Rechargeable Batteries 4 Pack Specifications: Ni-MH, Low Self Discharge rechargeable batteries 2550mAh typical /2450mAh Ni-MH minimum (AA) Feature: eneloop 2550mAh typical /2450mAh Ni-MH minimum (AA) Hold up to 85% of their charge after one year of non-use Can be recharged up to 500 times Pre-charged at the factory using power generated from solar energy and ready to use right out of the package Work in extreme temperatures down to –4°F No memory effect – batteries can be recharged when fully, or partially drained Ni-MH, Low Self Discharge rechargeable batteries