@mostafa, it would really help if you could add your location to your profile. A lot of advice given can be country specific.
Like this recommended USB charger. The link is for Ikea in the US. I could give a link that would be appropriate if you are not in the US. This USB charger is appropriate for your Kindle and it has 3 USB ports and no bright LED light like most multi-port USB chargers have.
http://www.ikea.com/us/en/catalog/products/10291881/