Hi, I have an LG G2 smartphone and trying to charge it using the USB charging port of the Surface Pro 3 power adapter. It doesn't work, the phone intermittently reports plugging in / plugging out the charging cable. But at least it works (slowly) trying to charge it on the SP3 USB port. Anyone else has this issue ? I am a bit sad that the AC adapter on SP3 is only 36W, the 48W SP2 charger has not had any issues like this. The tablet itself charges noticeably slower.