I have taken the battery out and am considering stripping the wires from the usb charger and taping a wire to the plus and wire to the minus but I am afraid I will blow the damned thing up, hasn't stopped my from thinking about it
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.
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