Don't let the name "Junior" fool you. The Streamlight Jr.® LED lights may be lightweight and compact, but the light they produce is anything but small. C4® LED technology emits a blast of bright light with a far-reaching beam that you'd never expect from a flashlight this size. And the Jr. LED series of lights are big on dependability too. They run up to 4 continuous hours on two "AA" alkaline batteries.