PureGear Extreme Charger
Another excellent Quick Charge capable device that you'll want to consider for the Galaxy S6 or your Galaxy S6 Edge is from PureGear. The Extreme Quick Charge 2.0 certified charger has a 2.4a output for extremely fast charging, and our favorite part is the wall prongs fold away.
This is great as you'll have the fastest charging possible in a small form factor that won't take up two spots on the wall, and then you can fold it down for easy storage while traveling. This is another we've bought for traveling purposes, and is an excellent all around charger. It is now as cheap as $10.