Hanozo

Guys I need your help. Please! So i bought this mod from a friend. It was working perfectly fine for about 2 weeks. Now when I rebuilt mycoils, my batts suddenly became 0% when Im still at about 80%. What should I do? I didnt do anything with it in escribe. Is it out of date and needs to be upgraded? Firmware version? Please help me. The warranty service pops up not that much. Im really concerned about the 0% issue. Help!!