this post was submitted on 19 Jan 2025
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safe? (lemmy.ca)
submitted 2 days ago by ColdWater@lemmy.ca to c/askelectronics@discuss.tchncs.de
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[โ€“] quiescentcurrent@discuss.tchncs.de 12 points 2 days ago (1 children)

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.

[โ€“] ColdWater@lemmy.ca 1 points 2 days ago

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