Battery jump

[Marko Kravitz]

Hi. When I charge my HTC One X in AC Outlet, I check the battery and it?s bout 85% charged. Then I check it about 10-15 minutes later and it?s 100%. I always have a feeling like it skips the last 10%. Is this normal? I have 4.1.1. android and it?s new device, not rooted or anything ...