Battery Holder for LED Flashlight that hold the 3x AAA batteries. The metal column in the positive end is spring-loaded to fit most lights. Use this battery holder for 3pcsAAA battery as a replacement unit or to substitute for using the18650 battery(- not all the flashlight are compatible, pls be sure to check on yours.)Battery Holder for LED Flashlight that hold the 3x AAA batteries. The metalcolumn in the positive end is spring-loaded to fit most lights. Use this batteryholder for 3pcs AAA battery as a replacement unit or to substitute for using the18650battery (- not all the flashlight are compatible, pls be sure to check on yours.)