Streamlight PROTAC 2AA-X USB Rechargeable Lithium Polymer Battery Pack 1 Pack. In an attempt to make sure that you possess a long lasting and efficient power supply these Batteries from Streamlight are designed using some of the longest lasting resources out there. Streamlight has been building high quality power packs for a long time and the Streamlight PROTAC 2AA-X USB BATTERY PACK 6D0937B9 is verification of their commitment to providing the population with the very best electric batteries available. For a great way to be sure you are using heavy duty and efficient batteries select the Streamlight PROTAC 2AA-X USB BATTERY PACK 6D0937B9. Package Contents: Streamlight PROTAC 2AA-X USB BATTERY PACK Streamlight 88136: PROTAC 2AA-X USB Rechargeable Lithium Polymer Battery Pack 1 Pack