PiPO M9 pro OTA - Manual (Page 37)

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VIII. Battery
Very Low Battery Full Battery Charging Battery
‗ ‘ indicates that the power of Battery is full. When the battery level becomes
too low, a prompt comes up to note you to charge your tablet.
While charging, you can check the charging status in the lock screen:
It takes around 5 hours to charge your tablet to full battery. Please only use a
5V /2.5A adaptor included in the gift box to charge it.
IX .Firmware Upgrading Procedures
9.1 warnings before upgrading
1. Please read the below carefully when you try to upgrade your tablet.
2. Please make sure that the firmware matches your tablet.
3. Please backup your data before upgrading, the storage will be formatted
when upgrading, data will be lost and unrecoverable.