Just to state the obvious, the Stock ORIGINAL battery is 1320mAh, the super SCUD battery is 1420mAh@1510mAh.
I would suggest that you charge it externally and if it still only goes to 86% then get another battery cause it might be the protective circuit in the battery that bad because of fake/crappy quality battery.

When you have your battery "fully" charged, then post the value here of "lshal | grep battery.voltage.current"