DeWalt DCB324-4 20V MAX Lithium-Ion Battery 4-Pack, (2) x 4.0 Ah + (2) 2.0 Ah

Using this DeWalt battery pack is easy. First, make sure your DeWalt 20V MAX* tool is turned off. Then, simply slide the battery onto the tool until it clicks into place. You can tell how much charge is left in the battery thanks to the 3 - LED Fuel Gauge System. When it's time to charge, remove the battery from the tool and connect it to a compatible charger. For safety, always store the batteries in a cool, dry place. Avoid exposing them to extreme temperatures or moisture. To keep the batteries in good shape, charge them regularly, even if you're not using them often. This will help maintain their performance over time.