Default Samsung charger

Hello. I have a kindle fire hdx 7 with the stock charger, but it charges alfully slow. As I don't live in the us, I can't buy the official 9W, 1.8A charger. I can only find Samsung's 2.0a charger. My question is if the charger is going to work and if its going to do any harm to the device if I use it.

Sent from my HTC One using xda app-developers app
..... Nokia 5800 (CFW) (Broken) > Samsung Omnia 7 (UnloCcked and Lost) > HTC One X (Sold) > HTC One M7 (Sold) > Galaxy S5 (Stock ROM + KT Kernel @ 2.85GHz )
Acer Iconia A500 (Sold) > Kindle Fire HDX 7'' (Full Stock)
iPod Touch 4G (Cracked Screen but still working)