Using your DeWalt DCB124 battery is easy. Just insert it into your DeWalt 12V MAX* tool and you're good to go. The 3 - LED Fuel Gauge charge indicator will show you the remaining charge, so you can plan your work. When it's time to charge, use any of the compatible chargers like DCB100, DCB101, etc. Make sure to charge the battery in a cool, dry place. Avoid exposing the battery to extreme temperatures, as this can reduce its lifespan. After each use, check the battery for any signs of damage. If you're not going to use the battery for a long time, store it at around 50% charge. And remember, this battery comes with a 2 - year limited warranty, so if you have any issues, contact DeWalt support.