The TASER™ Pulse Lithium Replacement Battery delivers 50 firings and is easy to install. Just slide the pistol grip cover off of the bottom of your TASER™ Pulse, disconnect the old battery and connect the new one. This is the long life replacement battery for the TASER™ Pulse only. It will not fit any of the "C", "M" or "X" models. CONTENTS Taser Pulse Battery Pack