Finished my aliexpress build: Pi 3A+ (only part not from Ali) . This is quite a tight fit and the header and usb port need to be desoldered. Display: MHS-3.5 fast SPI with JUJ driver. The display is a bit wide for the DMG shell so the bezel & board had to be trimmed a bit and also the driver had to ...

Second wiring cheme is correct. Vout: pi zero 5v pin Vin: micro usb socket or 5v barrel socket .. this is where u plug in the charger Bat: lipo battery + GND of the pi, charging port and battery can be soldered tohether or to any of the gnd pins. KEY needs to be wired to a seperate push button. Shor...

Regarding that powerbank module... i had the same but it was flaky and i replaced it with a similar one from aliexpress (mh cd42) which solved most issues. Either way the basic wiring is simple. Just connect bat, vin, vout and gnd. Then you will need extra push button to start or stop the integrated...

Not when it is powered off.. but there are 2 adjacent 5v pins that have continuity. But if the pi is fried so that you have continuity then it probably wont even boot. If it does boot you could install wiringpi and then the do a gpio readall

Not sure how you would shore up the edge but 2mm tape all around is fine.

Im going to use the cheap "mhs 3.5" display from aliexpress for my next build. Its 480x320 and has a fast spi interface and a spi to dpi converter. I got about 30 fps out of it. Fitting it will require some trimming of the bezel as with the 3.5 hdmi screens some people here are using.

That aliexpress kit has issues for the headphone jack from what I read online- https://www.raspberrypi-spy.co.uk/2019/06/gameboy-zero-6-button-board-from-aliexpress/ I built two with this aliexpress board. It works fine. As i dont need headphones i just soldered the amp to the pads and use hotkeys ...