The MILWAUKEE® REDLITHIUM™ USB Hard Hat Headlamp is 20% LIGHTER WEIGHT, BRIGHTER, and offers MORE RUNTIME. This high output, compact headlamp is all powered by the REDLITHIUM™ USB Battery. This rechargeable headlamp is a lightweight and compact design that delivers 600 lumens of TRUEVIEW™ HIGH-DEFINITION OUTPUT with hy Milwaukee 2163-21 - REDLITHIUM™ USB Hard Hat Headlamp