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PacoRaapNL said..For those who look at the circuit as being a "WHAT IS THIS"?
I connected the loose ends for clarification.
VBUS is connected to the input from the USB connector so 5V comes in from there.
D7 and D8 are diodes with a fuse function.
They make sure that both give their voltage onto the switch.
They also make sure the USB 5V (VBUS) is not directly connected to the battery VBAT and vice versa.
Voltage goes through the blue arrow direction not against it.
Yes thats the theory, AND there is a (extra) fuse between VBAT and pin 2 (VCC)off the PH-2-WO connector (where the battery plugs in). That fuse will fail (changes is 90%) so thats why we advice to solder the battery to the VBAT pin.
But if you solder the battery to the 5V pin (Beside the VBAT pin) the battery cant charge properly ....... but it does?? Not recommended but if VBAT is not reacheble, 5V can be used as a work around
