The microprocessor controlled charger BQ-CC55E is perfectly suited for the demanding user. The charger monitors each single cell which means each of the eneloop batteries is charged individually, the charging is via a peak-cut-control, are individually examined and charging stops for each cell when fully charged.The charger has a UK 3pin plug.There are 4x Rechargeable AA ENELOOP Pro BK-3HCDE batteries included with the charger.By improving the metal-hydride alloy lattice, eneloop retains 70% capacity even after 5 years in storage.Stable voltage performance guarantees far longer life than conventional dry batteries even in extreme weather.Maintains high voltage in temperatures as low as -20 °C3—far longer than dry cells (great for skiing or hiking). Performance is also stable when stored above 40 °C.