The intelligent eneloop fast charger is ideally suited for demanding users and can charge 1-4 Ni-MH batteries of size AA (Mignon) or AAA (Micro). It features individual slot monitoring, checking and charging each cell separately. Each charging slot has an LED display that shows the status during the charging process. For particularly gentle charging, it is equipped with a premium overcharge protection system that includes Smart Charge and deltaV: it charges each cell individually and automatically stops the charging process before overcharging occurs. The microprocessor-controlled charger offers many other practical features, including the ability to determine the remaining charge of already used batteries. In just 1.5 hours, 1-2 empty eneloop batteries can be fully recharged. The Battery-Life Checker checks the condition of your batteries and indicates when a battery needs to be replaced.