Why do we still need to plug in our phones to charge them? Wireless charging exists, and has for quite some time, but most manufacturers don't include it in their devices. When it comes to the Samsung Galaxy S4, you can buy a QI-compatible wireless charging kit, but between the charging pad and the battery cover, you're looking at around $90 or more.
The other issue with Samsung's official kit is that it actually makes your GS4 about 1.7 mm thicker. That may not sound like much, but you will notice the difference. Considering that and the hefty price tag, the best option is to make your own... more