How should the LED on the power meter blink normally during charging?

  Gen 1 power meter spider:

    The LED stays on when plugged in and automatically goes off when fully charged.

  Gen 2 power meter spider:

    ① Official firmware version 40/41: After power-on, the four LEDs flash in sequence and go off when fully charged;
    ② Beta firmware versions 105/106/107: After power-on, all four LEDs flash simultaneously and go off when fully charged.