I just wanted to give an update. I have recreated the problem I was seeing before - this time using the "CapacitiveTouch" example provided by LilyGo on their GITHUB page meaning I can rule out anyting in my code as being a problem.
linked here...

Again, the problem is a follows, when the unit is powered from the USB port, it recognizes all touches on the screen without any problems. When the USB power is removed and the unit is powered by the internal battery it sometimes works and sometimes doesn't recognize the touches on the screen. This makes the T Display S3 Pro unusable for me as a battery powered, portable device.

My question is: Do I have a faulty unit or is there some kind on inherent design problem that effects every one of them?

Thank you!

I have this issue that is driving me crazy. When I have the T-Display S3 Pro connected to my computer with a USB cable the touch screen reacts quickly and perfectly. However, when I disconnect the USB cable from the T-Display S3 Pro the touch because much less reliable and often doesn't sense my finger touching the screen. I have it set up so that it displays the x and y coordinates on the screen so I can see if it sees where I touched the screen and there I can see that the numbers do not change.

Has anyone else also seen this issue?

Thank you!

I recently bought the T-Display S3 Pro and have a question about the battery charging behavior. If I have the switch in the off position and I plug in the USB cable, the charge (RED) LED flashes rapidly. By this I mean at least 2x per second, maybe faster. This flashing is there all of the time and never goes away.

When the switch is in the ON position and the battery is charging, the RED charging LED turn on and stays on. When the battery is fully charged (I think it’s charged) the LED turns on for a brief time (sometimes just a flash, other times for up to 3 seconds) and then turns off for some time (25 -30 seconds).

My question is if this behavior is normal or if my T-Display S3 Pro faulty in some way because to me, the behavior is odd.