So long as you're sure of two things...
One, you gotta get the right pins. Two, you need an output voltage from the jack itself of 3.7 to 5 V.
The second may change if it's a newer phone that uses USB-C and has fast charging. In that case, it can handle more than 5 V, but you won't break anything with 5 V output from the jack itself.
Basically, stay under 5 V and you should be set.
Otherwise, contact your cell phone company and see what they have stuffed in their 'used' drawer for cheap phones that are at least a little modern?
I generally charge my phone with the usb ports on my laptop and I have no clue the voltage they put out
3.5 to 5 V, normally. Is it USB 2.0 to 3.0? If so, it should adjust to the draw, so that'd be fine.
Well, should be.
You just need to nail the correct pins.
Its 3.0 usb
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