After updating my phone to kit kat some time ago, I've recently been experiencing slow charging issues. I plugged my phone in for about two hours and the battery went from 2%-48%. I continued to let it charge til 2a and it was only at 63%. It did eventually reach 100% but I don't understand why it's recently become an issue. I'm using the OEM charger and cable, tried plugging the AC adapter directly into a wall outlet, and even purchased a new battery.