I have a ep-880 charger and ec-450 usb cable, but charging is taking 2 hours and 40 minutes so is the charging slow? The usb is not the one that comes in box. If this is usb problem please tell me which usb should i use?
I have the same problem , my charging time is almost the same as you ,someone said it is relative to the USB cable .
the one that comes in box is ec801.
sorry for my terrible English.
In my opinion,It's relative to the USB cable's resistance. so it's up 2 you or you can choice a another one .it doesn't matter.
you can check the charging current by yourself with Galaxy Charging Current on google play.
by the way , Google is very powerful tool you should konw..