Sanyo eneloop Power Pack & charger Pre-charged Ni-MH rechargeable battery kit * Charger unit model # NC-MQN06U * Charge 2 or 4 batteries at the same time in pairs. * eneloop Rechargeable Battery Power Pack * Pre-charged Ni-MH rechargeable battery kit * Economical: 1 eneloop = 1,000 alkaline batteries * Worry-Free: eneloop works in any device that uses AA, AAA, C or D batteries * Convenient: eneloop batteries are pre-charged and ready to use when you are Battery Charger Features: * (Worldwide Voltage) * Charges both AA and AAA Ni-MH rechargeable batteries * Foldaway plug; No cords or wall adapters needed * Multi-color LED charge indicator lights Long Storage Life: Batteries have a property to release the stored energy in small amounts over time (self-discharge). Improvement in self-discharge characteristics enable eneloop to be "ready to use out of the package" and to have long shelf life. It keeps 85% of the initial charge after 1 year, so it can be used now or as an emergency battery.