I have a Zero W and an Adafruit PowerBoost 1000C. I want to use the PowerBoost with a battery to power the Pi (and charge it) but I want to use the original PWR IN microusb on the Pi, instead of the microusb power in on the PowerBoost.
That is, I want power to go from the power supply to the Pi power jack to the PowerBoost power jack, then split to the battery and back to the Pi (via PP1 and PP6). The only thing out of the ordinary in this scenario is using the Pi's microusb as part of the route to get to the PowerBoost.
Is there anywhere on the Zero W I could cut a trace or remove a resistor or something to interrupt the flow of power from the microusb PWR IN to the rest of the Pi (and instead re-route to the PowerBoost)? Otherwise, I'd have to lift the +5V pin on that microusb, and that looks tricky (probably have to desolder the entire jack).
[The reason I want to reuse the Pi's jack, is I want access to all three jacks (power, USB OTG, and mini HDMI) and I don't really have room to put the PowerBoost there as well, so I'd like to locate it elsewhere in my limited space.]