The 3M™ PPS™ Sun Gun™ II Battery Pack is used with the 3M™ PPS™ Sun Gun™ II Colour Matching Light Kit, 16550. It is not compatible with earlier versions of the 3M™ PPS™ Sun Gun™, 16400. The 3M™ PPS™ Sun Gun™ II features a NiMH battery for longer run time between charging cycles, delivering improved cycle charge time.