Aftermarket wireless charging receiver Qi standard for Galaxy S3 and S4 phones are available on eBay. They fit over the battery, connect to the charging contacts built into the S3/S4 and are thin enough to enable using the original battery cover thus avoiding a perceptible increase in thickness - just a very slight bulge. I'm still able to use standard cases/holsters. They work perfectly with my Verizon Qi charging pad. The METRANS brand (black) work well; however, the white other brand did not work with my Galaxy S3.
