Using the Lezyne Hecto Drive 500XL is easy. First, strap it securely to your handlebar. You can choose from eight different output modes according to your needs, like using the Daytime Flash mode during the day for better visibility. To charge it, just use the integrated cable - free USB stick and plug it into a power source. It takes about 2.5 hours to fully charge. The light can run for up to 20 hours, but this may vary depending on the mode you're using. As for maintenance, keep the aluminum body clean and dry. Avoid exposing it to extreme temperatures or impacts. Remember, this light is not for sale in the German market.