Using your Milwaukee 2115-21 headlamp is easy. First, if the battery isn't charged, plug it into a power source using the 2 ft heavy - duty cord and the micro - USB port on the headlamp. You can also swap in a pre - charged REDLITHIUM™ USB battery. To wear it, if you're using a hard hat, attach the headlamp with the four universal hard hat clips. For bare - head use, adjust the sweat - absorbing microfiber strap for a comfortable fit. To turn on the headlamp, find the power button. You can then cycle through the four light output modes: High for maximum brightness, Medium for regular use, Low for conserving power, and Eco for long - term, low - light needs. When not in use, keep the headlamp in a dry place. Avoid exposing it to extreme temperatures. Clean the headlamp with a soft, dry cloth. If the battery isn't holding a charge well after a long time, remember it has a 2 - year warranty. And the headlamp itself has a limited lifetime warranty, so if you run into any issues, reach out to the manufacturer.
