Tenswall mp3 player wont turn on

I have a tenswall mp3 player when i unplug the charger it wont turn on it was working a few days ago but now it wont turn on unless its plugged into charger how can i fix it to work again.

Hi @Tmm5899,

Have you opened a Support Case? If not opened, for more information, please contact the SD Technical Support team for best assistance and troubleshooting: