This video features a review and demonstration of the Black Diamond Iota headlamp. This is a great headlamp for hiking, backpacking, camping, running, biking, trekking and adventuring. This headlamp features a USB lithium ion battery which is exceptional. Its total power is 150 lumens. I’ve used it a ton of times and am extremely happy with its performance.
Iota Black Diamond Headlamp: https://www.blackdiamondequipment.com/en_US/headlamps-and-lanterns/iota-BD620628_cfg.html