Since, contrary to popular belief, the speaker and tweeter is a mechanical device, not an electronic device, if more than the defined power is applied to it, the life of the part will decrease rapidly, a strong reflex (whistle caused by the proximity of the microphone to the speaker) It brings the worst and most intense pressure to your Twitter gang.
The battery needs to be charged, or if it has just been charged, you need a new battery.
Yes, use the terminal on the back of the band designed for this purpose.
The answer is definitely no.
The best cable for audio devices, regardless of the type of its coating, which is more commercial, is a cable that is sprayed and its material is pure copper.
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