Using this GAONENG battery is easy. First, make sure it's fully charged at a 0.2C rate before using it with your Jumper T20 GEMINI. When connecting, match the yellow XT30U - F discharge connector properly. During use, don't over - discharge it to keep it in good condition. As for maintenance, store it in a cool and dry place. Check its weight occasionally to ensure it's around 146g (+/-4g). If you notice any significant changes in performance, it might be time to replace it.