Agreed. The freebuds pro works with a power bank. Before the battery leaves the factory, the manufacturer has carried out activation processing, and pre-charging, so the battery is more than electricity, a friend said that the battery is charged according to the adjustment period, standby is still seriously insufficient, assuming that the battery is genuine battery, in this case should extend the adjustment period and carry out 3 to 5 times full charge and discharge. If the newly bought mobile phone battery is lithium ion, the battery has been activated before the factory.