$Garmin 010-10635-00 AC Adapter for USB Cable. Use this Switching Power Supply 100-240V to change your Garmin USB cable into an AC charger. (USB Cable Not Included).
My S6 didn't come with a wall charger. This charger does as advertised. I needed it basically for travel and when I'm away from my computer.
The only drawback is that it takes a lot longer than the USB charger to charge my unit.