Last year back in November Google engineer Benson Leung elucidated that if a device or a charger utilizes a Qualcomm Quick Charger 2.0 or 3.0 technologies it doesn’t mean it will coexist with USB Type-C specification. The engineer said that QC 2.0 and QC 3.0 utilize proprietary charging methods including a changeable electrical energy technique that modifies the Vbus above 5V, something that USB Type-C specification prohibits.
It means that any kind of device using Qualcomm Quick charger go off against the USB Type-C specification and for those doubt how LG G5 and HTC 10 support the USB Type-C, it is because the flagship handsets support Qualcomm QC technology clubbed with USB Type-C. Particularly the Sony Xperia X and Samsung Galaxy S7 don’t support Quick Charge.
Leung said that, “I don’t advise any Qualcomm Quick Charge 3.0 USB Type-C charger because any of them that assert to support Quick Charger 3.0 on a Type-C port violates the Type-C specification. The Type-C specification specially prohibits proprietary charging techniques that try to alter Vbus beyond 5V." He also includes that the section 4.8.2 of the Type-C Specification obviously prevents the mix of USB Type-C and Qualcomm QC technology.
Though, it is not clear yet that what is exact threat of using Qualcomm Qc beside the USB Type C. As per Android Police, USB Type-C was experienced with with non-proprietary charging at 5V and was found safe to use. On the other hand, escalating the volt might end up damage the smartphone. There is a limitation of using Quick Charge on USB Type-C is as well such as it doesn’t allow users to use data connection at the same time.
In November, Benson Leung also assaulted at OnePlus users not to purchase the OnePlus’s USB Type C adapter because it is not compliant with standard specifications. But, the company claimed that its adapter and Type-C cable are acquiescent with Type-C 1.0 protocols and USB 2.0.