Using these bike lights is a breeze. First, charge them using the USB charger until the battery is full. For cycling, attach the lights to your bike using the included bike mount. It doesn't need any tools, so you can do it quickly. If you're not on your bike, you can take off the mount and use the built - in clip to attach the lights to your belt, pocket, or bag. When it comes to maintenance, keep the lights dry and clean. Wipe them with a soft cloth regularly. Don't expose them to extreme temperatures. If you notice the lights are not as bright as before, it's time to recharge them. Also, make sure to store the lights in a cool, dry place when not in use.