Using these CNHL LiHV MiniStar batteries is easy. First, make sure to connect the battery to your device using the XT30U output connector. When charging, use a charger that can support a maximum charge rate of 5C. Don't over - charge or over - discharge the battery as it can damage it. Store the batteries in a cool, dry place when not in use. Every few months, check the battery's voltage and overall condition. If you notice any swelling or other signs of damage, stop using the battery immediately. These batteries are great for your Mini FPV Racing Drones and Quadcopters, so enjoy using them and keep them in good shape.