Using your DeWalt DCB2460C Starter Kit is easy. First, make sure the batteries are fully charged using the included DCB1104 charger. You can check the charge level on the battery's LED indicator. Once charged, simply insert the battery into your 20V MAX* tool. Whether it's the DCH172B compact hammer or other compatible tools, they'll be ready to power through tough jobs. When you're done, remove the battery from the tool to prevent accidental activation. As for maintenance, keep the batteries and charger in a dry place. Avoid exposing them to extreme temperatures. If you're not going to use the kit for a long time, store the batteries at about 50% charge. Also, regularly check the battery contacts for any dirt or debris and clean them gently with a dry cloth. That way, your DeWalt DCB2460C kit will last you a long time and keep performing at its best.