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Because that has a 5v output
Than why do all the listing pages say it does?
Still damaged USB connector,you may still can use internal charger circuit.But internal photos from fccid aren't clear enough.Take some good photos of that area and maybe we can identify where to apply 5V via another plug connector.
That large trace is the 5V input, negative is ground. Should be easy to solder a replacement connector in place. There are even micro USB connectors that only have power and ground pins to greatly reduce the precision needed.
On that header on bottom of PCB you have VUSB and GND,you may apply 5V from external power source and see if charging.If not,VUSB maybe not really routed to that header or for charging you need short or something on USB dataa+ and - lines.Looking again at photos looks like U1 near battery connector? is charging ICAnd wide trace where silk marking CSP C 94V0-88S is VUSB 5V inputAnd also maybe on bottom side L1 and L2 are on USB data+ and data- linesTake careYou can't find continuity of 5V input on battery connector5V -> charger IC input- charger IC output (4.2V) -> battery connector.In that case 5V -> U1 pin 1 (input) -> U1 pin 8 (output) -> battery connector
I don't know where switch is locates.But tracking traces on PCB seems like charging is straight from USB connector.NXE seems to be Bq24040Are you counting right pins?(from photo I was wrong,assuming 2x4 pins,but looking again is 2x5)So pin 1 input VUSB, pin 10 output to C5 and Batt+ (three pin connector)Is that three pin connector battery connector?
I think it should charge no matter of on-off switch.That is pin 10 not 6Counting is like1-102- 93- 84- 75- 6You could use USB cable to board and see if charge.Don't go blind and assume USB wires respect designed color,red 5V black gnd green and white data.Better check first.I've find many that don't match that .5V to C4 side which goes to pin1 and gnd to some gnd on board or the other side of C4
I'm not 100% sure but like I said L1 and L2 could be on data+ and data- USB Now depends on how is designed?Is USB only for charging? Or have some USB connectivity? Need to be switched on to have USB connectivity?When off and connected to PC USB was detected by PC?First check if any voltage present on L1 and L2.Then you may try to test data+ to L1 and data- to L2 if not ok swap them.Or short L1 to L2 And see if charging