Using the Milwaukee 2145 - 20 M18 Radius LED Compact Site Light is easy. First, connect it to a compatible M18 RedLithium battery or charger. You can hang it using the self - centering hang hook or reinforced hang hole, or place it on a flat surface. Use the 180 and 360 - degree electronic light control to adjust the lighting direction as needed. If you need more light, you can connect up to 10 lights together using the AC in and out feature. When the low - battery indicator comes on, it's time to recharge the battery. As for maintenance, keep the high - impact polycarbonate lens clean and check the AC plugs regularly for any damage. Avoid using it in extremely wet or dusty environments, even though it has IP54 ingress protection. And remember, it comes with a 5 - year tool warranty and a limited lifetime LED warranty, so you're covered for a long time.