I took it to work in the workshop and finally get rid of the wires, and I don’t make great demands on the sound quality. Noise isolation for C grade, the grinder cuts the ear, before that cheap Chinese ones isolated 2 times better. For the street, not a deaf option is probably better. It is clear that the 300mAh \ 50 math does not work and in real life the case will charge from scratch 3 times. I would rather recommend it than not. As a transitional option from wires.
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