MP3 players are great for music with interesting sounds. Because they use the same charging system like mobile phones, their charging system fails and needs replacement -How To Fix MP3 Player Charging Problem
Mp3 Player Not Charging
The image above indicates the negative charging way as GND (White wire) while and the positive as VCHRG (Red wire). Usually, when fixing the charging port, a USB cable is soldered directly from the mp3 circuit board, since the Charging ports in MP3 are not really strong and may pull off the circuit board even after replacement. See the picture below.
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