Funny problem that I suspect is adafruit Powerboost 1000c or battery

[sonarsup1934]

My build is just about done, but I am having a weird issue that I suspect is a battery / grounding / Powerboost problem.
I have my wiring setup exactly like this.


While plugged in with or without the battery my screen is perfect. (picture wasn't great, but the screen works perfect)

20181223_155719.jpg (728.49 KiB) Viewed 2878 times

However, for some reason when I go from being plugged in with the micro usb port to running on battery my screen goes crazy.

20181223_155656.jpg (1.21 MiB) Viewed 2878 times

This also happens when freshly booted from the battery.

I tried other things like adding a ground right from the negative terminal on the battery jst connector to my ground strip. I unsoldered and resouldered all of my ground and 5v connections, and I am not seeing any real power loss when I switch from plugged in to battery power.
Voltages are:
5.15 plugged in
5.13 unplugged.

Other than that the transition is flawless, the unit stays powered on and I can still play games.

Anyone have any ideas? Thanks in advance!

[tinkerBOY]

Do you have any spare powerboost or battery you can try?

[sonarsup1934]

Do you have any spare powerboost or battery you can try?

No, I am thinking about doing another build after this one, so I may buy a 2nd battery and powerboost as a test.