High capacity circulation function, perfect replace your original batteries. Before you order open up your shaver to confirm that you are ordering the correct battery. Some shaver models in this list requires AA cells and some AAA cells . This battery pack is the AA cells. Some models may require that you trim one or both of the metal contact tabs. Some models may require soldering. Also for some models there are two potential batteries with part numbers 422203613480 and 138-10609. ?After-sales Service? Your satisfaction is important to us, please feel free to contact us with any question, 24*7 Email support. Dimensions:48.73 x 28.68 x 14.31mm Type :Ni-MH Weight:104.0g. Battery Voltage:2.4v Capacity:2000mAh.