With each new version of Android, Google has published a lengthy document entitled Android Compatibility Definition Document (Android CDD for short). The Android 7.0 Nougat has a pair of recommendations that’s interesting about the use of a fast charging system under USB-C.
For the first time, Google is strongly encouraging manufacturers not to handle the quick charge system and to adhere to the standard USB Power Delivery that Android integrates natively. The document says:
it Is strongly recommended that devices USB Type-C do not support systems of cargo owners, which change the voltage of the Vbus above the default levels. It is also recommended not to alter the input and output functions which could result in interoperability problems that can only support the standard methods of USB power. Although now it is only a recommendation, in future versions, we may require that the USB Type-C support full interoperability with the standard USB Type-C
Also, devices should be able to detect chargers 1.5 and 3 amps to the resistance of the USB Type-C, and to be able to detect the change from one to the other.
USB ports-C are relatively new, and there is currently no universal standard for controlling the process of charging the battery fast. Google has theirs (Android USB Power Delivery), Qualcomm has their own system-called Quick Charge, which is the one used Asus, HTC, Xiaomi, LeEco, LG, ZTE, and Sony. Samsung has developed its own standard for the ill-fated Galaxy Note 7, although there is still no conclusive evidence of which has been that ended up burning down the batteries.The investigation is ongoing.
The new recommendation of Google could be a hint to Samsung, but more probably is a way to avoid future problems by asking manufacturers to adopt a single standard of once. Of course, Google comes very well that this standard is theirs and not the Qualcomm. [Google via Ars Technica]
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