A surgical system includes a surgical instrument, a battery assembly, and an aseptic bag. The battery assembly is configured to removably couple to the surgical instrument. The aseptic bag is sized and configured to encapsulate and seal the battery assembly within an inner chamber. The aseptic bag can cooperate with a fixed handle of the surgical instrument to encapsulate and seal the battery assembly within the aseptic bag. The aseptic bag may additionally or alternatively encapsulate a generator of the surgical system.
