Master Cutlery 19704 Lithium-Ion Rechargeable Battery for LED Flashlight Cardboard Box Coast A25R/HP7R USB Battery Pack Lithium-ion battery pack comes with a built-in USB connection Using a Micro USB, you can Recharge the battery either inside or outside the light Compatible with the HP8R, HP7R, A25R, TX7R, and TX9R Rechargeable LED Flashlights.