Tried the Tylt insert for our S5's. It created a lot of heat. The Tylt charged 1% in 15 minutes. Ordered the Samsung back from Amazon for the wife's White phone. As mentioned previously the official back is thicker. The official back creates very minor heat. Per comments I found on Amazon the Belkin Air Protect from Best Buy does fit with the Samsung charging back. Ordered the black cover for my phone from Amazon with 3 - 6 week wait on Saturday. Just received shipping confirmation. Should be here Wednesday. I tried two local Verizon stores. They were not able to order.