per discussion with @HarukiToreda and @todd-herbert

https://github.com/HarukiToreda/Meshtastic-Experiments?tab=readme-ov-file#power-measured-on-meshtastic-firmware-2310-from-battery

was taking some measurements not too long ago, and it does look like it's consistently drawing 50mA more than similar boards

ooh - just from looking at the schematic I think I see a problem: GPIO3 on the CPU is used to control the enable for the TFT screen power supply (U6). I don't see anything variant.h for that board that is setting that up. So we might always be leaving that (expensive) supply on. I'll check tomorrowish and if so, have it only on when we want the display powered.
oh i see that supply is shared with gps. But when GPS and screen are both not needed we can turn it off.