2。 . It depends on whether your battery or charger has been repaired. .
3。 . It will be washed after the first three uses, and it is not easy to damage the battery. It seems that using at low power will reduce battery life. .
4。 . The same is true when charging. .
5。 . A low battery is a low battery. .
6。 . I think MP3 will have to be changed in a few years. . As long as the USB interface finds a reflection on the computer, it should be a USB flash drive.
7。 . The playlist is played repeatedly. . Stop playing this directory when finished. . All at once means that all songs will automatically stop playing after they are played. . After the broadcast, it is repeated, and it is changed over and over again until it stops. . . .
Give some points.