Using this battery is easy. First, make sure to connect the XT90 output connector properly to your device. When charging, use a charger that can handle up to 5C charge rate and connect the balance connector (JST/XH) for a balanced charge. Always charge in a safe place and keep an eye on the charging process. As for maintenance, store the battery in a cool, dry place. Avoid over - discharging it, as this can damage the battery. If you notice any swelling or other signs of damage, stop using the battery immediately and replace it.