mobile

I've had my Aquos since October of 2014. I always let the phone die all the way before I charge it completely. So I let my phone die a couple nights ago, and since then it's taking 6 to 8 hours for the phone to charge from 0% to 100%. That's with the phone on OR off. Again, another reason they should give us source so we can root. I'd recalibrate my battery. Anyone else having this issue?