Don't go through finding a USB cable to charge up your S6 to S8 smartphones, use a wireless charger instead (usb cable & fast charging adaptor needed to power up & enable the fast wireless charging pad), and now you can convert the pad either horizontal or diagonal stand.
For S7 & S8 users, it takes at least 2 hrs to fully charge.
Any overheating issues- Nope! The pad comes with built-in fans to cool down the wireless charging device & the pad also prevents overheating the device while at it hehe!