My Samsung Galaxy S4 charger is a 2.0 A charger. When I bought it, it use to get fully charged in 1 hour or so but now when i do it takes three to five hours to get charged even more than that. When I started searching about this threat I found that it is in USB mode (like how it charges when I connect it to PC) and before it was in AC mode and use to charge faster. I'm really confuse, how to turn on that AC mode again.
My Charger detail:-
Samsung travel Adapter
Model: ETA-U90IWE
Input: 150-300 VAC
50-60 Hz 0.35 A
Output: 5.0 V ----2.0 A
Read more: My Samsung Galaxy S4 not charging like before?