The intelligent eneloop fast charger is ideally suited for the demanding user and charges one to four Ni-MH batteries of size AA (Mignon) or AAA (Micro). It features individual cell monitoring and tests and charges each cell separately. Each charging slot has an LED display that indicates the status during the charging process. For particularly gentle charging, it is equipped with a premium overcharge protection, which includes, among other things, Smart Charge and -deltaV. It charges each cell individually and automatically terminates the charging process before an overcharge occurs. The microprocessor-controlled charger offers many other practical functions, including the ability to determine the remaining charge of already used batteries. In just 1.5 hours, one to two empty eneloop batteries are fully charged again. The Battery-Life Checker tests the condition of your batteries and indicates when a battery needs to be replaced.