Hello,
I have a TailBat connected to Atom Lite but TailBat will turn off after few seconds. TailBat is fully charged (red light stops blinking while USB is connected to power source).

Is it a normal behavior or faulty unit?

Thank you.

Got it!
Thank you!

Hello,
how can I use built-in LED for debugging purposes?

I tried this:
pinMode(27, OUTPUT);
digitalWrite(27, HIGH);

but LED didn't light up.

Thank you.