Quick charging is technology to charge mobile device quickly and many latest devices these days support this feature. Quick Charging works only if the device supports it, but what happens user plug in a phone that does not support it. In this case, there will be no harm caused and mobile device will be charged by normal charging instead of unsupported fast charging.
This technology is also designed into mobile device by the mobile manufacturer. Also, quick charge is compatible and interoperable, a certified adapter can be used with a non-Quick Charge device, but the fast charging advantages of quick charging will not be available.
Quick charge works within the design parameters of batteries available in most mobile devices. It will charge the battery the way it is designed to be charged in normal conditions. Smartphone manufacturers make smartphones with a specific battery that will accept a specific level of charge. The battery size and maximum current of each battery are defined by manufacturer and are different for smartphones.
Quick Charge is generally connector and current-independent. It is designed to be compatible with a variety of formats like USB Type-A, USB micro, USB Type-C and Proprietary connectors. Latest devices supporting quick charge include Asus ZenFone 3, HTC 10, ZTE Nubia Z11, LG V10 and LG V20.