I recently sold my Galaxy S3 and decided to get a Galaxy Note 2 instead. I sold the charging circuit with the S3 which meant that I had to make another one for the Note 2. This time, I decided to use copper tape instead of wires to reduce the bulge on the device. This method is similar to the way I did it with the S3 except that you do not need to solder this way. Thanks to the various threads on the XDA Developers Accessories forums for the idea!
Again, this mod uses Palm’s Touchstone chargers to get wireless charging. There is now another way to get wireless charging, which uses the Wireless Power Consortium’s Qi standard. Many new devices use the new Qi standard like the Nokia Lumia 920 and the Nexus 4 and many Qi compatible chargers are coming to market which means there is a wider variety of chargers to suit your needs. There is even a Qi standard charging receiver for the S3 and Note 2 so you don’t need to do all of this. You can just buy the receiver patch, stick it on and you have wireless charging. However, the one thing that is stopping me from using Qi chargers is the price. Currently, Qi chargers cost at least 50 dollars shipped to Canada and finding the receiver patch is hard unless you pay upwards of 80 dollars for a charger and receiver. Compare that to using the Touchstone which also charges wirelessly but costs less than 10 dollars for a charger and also less than 10 dollars for a receiver.
What you need:
-Copper tape (getting ones with conductive adhesive is recommended, as it was slightly more difficult when I used tape that was conductive on only the non-adhesive side)
As seen above, I removed the receiver patch from the battery cover and trimmed away some of the excess black plastic (don’t cut the silver foil, the dock needs that to work properly). I placed the patch on the dock and measured to get a voltage of 5.62V. This also shows which terminal is positive and which one is negative. I have labelled mine with green tape as seen in the picture.
Next, plug in your phone to a normal charger (USB or wall charger) and place your multimeter probes into the two charging ports on your phone. This will tell you which port is positive and which is negative. If you are lazy, you can see from above that the port closest to the SIM slot is positive and the other one is negative. I placed another label indicating the polarity beside it.