The maximum charge voltage for a lithium cell is 4.2V while USB will provide 5V. It may work for a while, it may fail in a safe state or something gets hot and burns.
actually the powerpack have varied output (4.5v5a - 12v1.5a), I’m not planning to use this for real I just wanna see if it work or not since the powerpack and phone battery output the same DC current
If you would like some feedback in whatever is going on there, please explain what the problem is and what you want to know.
I connect powerpack to the battery terminal
Then this is not safe.
The maximum charge voltage for a lithium cell is 4.2V while USB will provide 5V. It may work for a while, it may fail in a safe state or something gets hot and burns.
actually the powerpack have varied output (4.5v5a - 12v1.5a), I’m not planning to use this for real I just wanna see if it work or not since the powerpack and phone battery output the same DC current