Voltage drop on Vin
The diode is dropping VUSB form 5v to 4.2v. even with no external loads. maybe it'll be wise to swap out this end-of-life regular diode with a Schottky one.
The diode is dropping VUSB form 5v to 4.2v. even with no external loads. maybe it'll be wise to swap out this end-of-life regular diode with a Schottky one.