https://blog.wongcw.com/2020/06/07/redmi-9%e5%8d%b3%e5%b0%87%e7%99%bc%e5%b8%83%ef%bc%9a%e8%81%af%e7%99%bc%e7%a7%91g80-5020mah-990%e5%85%83%e8%b5%b7/