A method of transferring a battery assembly to a battery-powered surgical instrument includes releasably engaging a battery jacket with the battery assembly, transferring the battery jacket, having the battery assembly engaged thereto, to a battery-powered surgical instrument, and releasably engaging the battery jacket with a handle of the battery-powered surgical instrument such that the battery assembly is electrically coupled to the battery-powered surgical instrument and such that the battery jacket and the handle cooperate to enclose the battery assembly therein. Aseptic battery jackets for such use are also provided.
