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Panasonic K-KJ17KHC82A eneloop pro NEW High Capacity Power Pack, 8AA, 2AAA, with "Advanced" Individual Battery Charger [amazon.com]
Up to 2550mAh (AA) and 950mAh (AAA) Ni-MH pre-charged rechargeable battery
Maintains up to 75% of their charge up to 1 year (when not in use)
Rechargeable up to 500 times
Pre-charged using power generated from solar energy
Charges from 1 to 4 AA or AAA batteries in any combination (110 – 240V)