Using this GAONENG battery is easy. First, make sure the device you're using is compatible with the battery's voltage and connector. Connect the XT30 discharge connector of the battery to your device properly. When charging, you can use a charger that supports a charge rate from 1C to 5C. Remember to always charge the battery in a safe place, away from flammable materials. As for maintenance, keep the battery clean and dry. Avoid over - discharging the battery, as it can reduce its lifespan. If you notice any damage to the battery, like swelling or leakage, stop using it immediately and replace it. Store the battery in a cool, dry place when not in use.