Lezyne's XL line looks good, performs well, and packs features that you can't find anywhere else. The Power Drive XL blasts a whopping 600 lumens from its machined aluminum housing and is designed to be visible form a full 180 degrees.,pThe Power Drive XL's tough aluminum body does more than look great. Aluminum disperses heat better than most of the materials used for headlights, and heat damages Li ion batteries over time. The li ion batteries found in the Power Drive XL are rechargeable via Micro USB or wall outlet and can be switched out right on the trail, so you can carry extra batteries for an endless ride. The light has five modes, and can last up to 11 hours on a full charge in flash mode. Lezyne also designed the Power Drive XL with its Constant Current technology, so the light won't fade as the battery nears the end of its charge.