Using the DeWalt DCK277D2 Combo Kit is a breeze. First, charge the two 2.0Ah batteries fully using the included charger. Once charged, insert a battery into either the drill/driver or the impact driver. For the drill/driver, select the appropriate drill bit for your task and insert it into the quick - release hex chuck. Then, adjust the speed using the variable speed trigger according to the material you're working on. For the impact driver, pick the right socket or bit and insert it in the same way. When using the tools in dark areas, the bright LED will light up, and it stays on for 20 seconds after you release the trigger. As for maintenance, keep the tools clean after each use. Wipe them with a dry cloth. Don't expose the batteries to extreme temperatures. If the tools aren't going to be used for a long time, store the batteries at about 50% charge. Always follow safety guidelines, wear appropriate protective gear like safety glasses and gloves, and keep the tools out of reach of children.
