Nandish wrote: I found a way to do it

I need a universal meter, exactly an ohmmeter (turn on the measurement of the diode and connections with the biper) touch the contacts in the dead earpiece in two directions (once plus at the top, another time plus at the bottom - like a diode measurement), it revives these Airdots every time.
Actually. The battery from the meter creates an additional voltage spike on the handset, which suddenly revives it. Something like a "deadline" battery, where the voltage drops below the critical value and it cannot be charged anymore until we heat it up or kick it with another voltage source.
I wonder why this is happening. I have two theories.
o One of the headphones is extremely discharged (and the phone shows 100% of the other one anyway), because it does not connect the pins well in the box and after a few minutes of use it simply drops to 0% (below the voltage, where it cannot be charged).
o The headphones are blocked due to interference from similar headphones in the vicinity.
1 option is more likely. If someone does not have a meter, I recommend connecting it to, for example, a mi band charger (this bracelet) - for a moment or put it in a warm place, on a power supply or somewhere a radiator or stove.