Using the Lezyne Mega Drive 1800i is easy. First, use the versatile strap to attach it to your bike's handlebar. If you want, you can use the additional accessory mounts for different mounting locations. To turn it on, just find the power button and press it. You can switch between the nine output modes according to your needs. When the battery runs low, use the micro - USB cable to recharge it. The advanced Li - Ion battery gives you nearly 2 hours of runtime at maximum output, and if you want more, connect it to the Infinite Light Power Pack. As for maintenance, keep the light clean. Wipe it with a soft, dry cloth regularly. Avoid exposing it to extreme temperatures or moisture. Also, note that this light is not available in the German market.