Hello, I have a 10400mAh external battery (powerbank) from Xiaomi and when I charge my Note 2 which uses a single cell 3100mAh from 1% to 100%, it charges pretty quickly and after charging it, the external battery still leaves 3 indicating lights out of 4 (which is reasonable since one light represents about 2600mAh). However, when I charge my Onda v971 tablet with a battery capacity of about 3600mAh (I believe that is also single cell), it uses the remaining volume of the external battery and it only charged from 1% to 67%. In both cases, to be fair, I have turned of the Wifi and reduce the background process and activities to minimum using Greenify when charging it. Therefore I am wondering what makes the tablet "consumes" that much battery instead of charging it... Any ideas. Thanks.