Hi guys, just bought my Mi4C last week and started to use it since three days ago in Beijing, China. I'm quite satisfied with the new smartphone, but mine has extremely slow charging speed - approx. takes more than 8 hrs or something to charge 80%. I thought it was due to abnormal draining but Android System and Android occupy 14% and 8%, respectively, so that might not be the reason. Is that because of 220 voltage of Chinese one, problem of my charger, or some defect of my Mi4C? It'll be great pleasure if anyone could help me with this issue. Thx!