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UnitPackPower as a professional manufacturer customize and supply high quality electric bike batteries to the top sellers of Amazon and Ebay, because always keep use the original A grade Sanyo, Panasonic,Samsung,LG cells and have perfect test system, more and more cycling enthusiasts from all over the world are enjoying the power from UPP batteries. For provide better service, there are 4 storages and after sale service centres spread in the United States, Germany, Australia and China. We specialize in electric bicycle batteries only, our goal is let all cycling enthusiasts get their satisfying batteries.