I did this on my Galaxy Nexus and used 8 magnets instead of 4 metal discs for a sturdy car mount setup (yet to be made). However, I use a custom kernel with a AC fast charge method I set with a toggle. That takes me from USB charging (350-450mAh) to regular AC charging rate (700-950mAh) according to my battery monitor pro app. Point is, once the sgs3 kernels are really in full force, I'm sure the fast charge will be a kernel option (if it isn't already). This mod rocks! I have touchstones in my room, family room, car, and work so easy charging is just a magnetic dock away
The touchstones are sooooo cheap now!
Sent from my Galaxy Nexus using Tapatalk 2
Tmobile Note 2- powered by XDA magic.