I recently purchased a T-Beam Supreme and set it up to my phone 5 days ago, removed the battery and placed it back in the lilygo case, I printed up a case and took it out and add the battery, Polarity was correct and the battery new and voltage confirmed 3.7v

The T Beam Supreme won't power up on battery or USB ??

I've contacted Lilygo and not got anything more than an acknowledgment email!

This was an evaluation unit and if the performance was good, several hundred would ordered !

Any Suggestions?