The Panasonic ENELOOP Rechargeable Ni-Mh AA Batteries are long-life, pre-charged, energy, and money-saving, recyclable rechargeable batteries which can be charged and discharged up to 2100 times. Eneloop batteries are pre-charged with solar power and can be used immediately as a normal battery. Rechargeable up to 2100 times - this protects the environment and your wallet. Eneloop batteries have extremely low self-discharge and are always ready for use. Even after 10 years of storage, Eneloop has up to 70% of the initial charge. Eneloop batteries are universally usable, environmentally friendly and can replace conventional batteries in all devices. They can be charged with standard NiMH chargers.