To enable charging your Galaxy S3 and.S4 using the Qi standard, receivers (the coil placed under the battery cover which connects to your s3's circuitry) are available online at reasonable prices. They are thin enough to avoid adding thickness to your phone and work with any Qi charging base. I found two brands on eBay. The Metrans (black) works well, but the white one did not work with my S3. Installation is fast and easy.
