this post was submitted on 19 Jan 2025
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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