Hi, this is Owen, i am the aftersales manager from CNBM, we are the sole agent here.
Firstly, i need to emphasize that the unit is working fine, what you saw soc can not be 100%, it is only the display problem, and it won't affect your usage, just make sure that you charge the battery more than 3 hours, then it can be charged fully. If you worry about the any similar problems, please return back to your supplier, they will help to send back to me to do the update and calibrate the SOC display.
Use this link to join the WhatsApp support group:https://chat.whatsapp.com/IA6p53HN6Ke2HBv5VhOuRL