I received a flawed copy, which was a bit unlucky of me. As soon as you start charging, within a few minutes (and sometimes seconds) the green indicator goes on, which means that the "type" headphones are charged. In point of fact, they require a couple of hours of charging time. While charging from a computer or charger, it is not critical - just leave it for 2 hours and they will charge. However the problem with the power bank is that as soon as it "sees" that the headphones are charged, it quickly stops charging them. As a result, the headphones cannot be charged on the road from the bank.
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