Have batteries with this USB Power Kit recommended for use with all Beam N Read LED lights. Includes a cube style USB/AC adapter (Input: 120 Volts AC. Output: DC 5v 1.0amp); 6 ft BNR-to-USB cable plus a 6 ft USB Extension cable for 12 ft total. Plug into the included AC adapter or any USB-A socket to save batteries. When on the go, unplug and use batteries for a long lasting light. Note: Kit is for external power and does not recharge batteries.