We needed a 2 Qi charging pad and have chosen this time for the original Samsung, we did not regret it and are very happy. It's a lot better than my previous "No Name Product" and invites more quickly, but of course slower than with direct cable to the unit. I use it with the original Qi back cover of Samsung and with us appears nothing hot and it remains at the trickle charge, when it goes fully ist.Da neither what made nor anything else, it is the green LED and is on the phone battery is full. The charging icon is still in the battery icon, and when the display goes out, the green LED on the S4. The Qi pad comes without cables and power supply, you have to connect with 5V and 2.0A charge current using the original Samsung charging cable with plug or another but because it kann.Kann then lead to errors recommend it to anyone.