Using these DeWalt 20V MAX Powerstack Compact batteries is easy. First, make sure your tools and chargers are also 20V MAX*. Just slide the battery into your tool until it clicks into place. When it's time to charge, put the battery on the charger. The LED fuel gauge on the battery will show you how much charge is left. This way, you can plan your work and avoid sudden stops. As for maintenance, keep the batteries clean. You can use a dry cloth to wipe them. Don't expose them to extreme heat or cold. Also, when not in use for a long time, store the batteries in a cool, dry place. This will help them last as long as possible and keep performing at their best.