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SMARTPHONES

Why Does Your Smartphone Not Fast Charge When Using Any USB Cable

Fast charging of smartphone batteries are a new and must needed feature these days, especially with Android devices supporting it effectively across all variants of smartphones and tablets. Most of the smartphone supports less than 30 minutes of charging sufficient to reach over 75% of battery charge.

How does a smartphone charge so quickly?

Most of these Android smartphones that support this fast charging feature in them makes it possible by using a proprietary USB fast charging technology. These proprietary fast charging technologies while helps in improving the charge time, but because of their proprietary nature, works well only when you use their provided USB chargers and cables. So, as a result if you try to use a different USB charger or a USB cable, the charging time would go slow again, thereby making you lose all the advantages of fast charging capabilities.

Is USB Fast Charging Not Standardized For Smartphones?

This begs the question as to why we are going for a proprietary USB fast charging technologies that limits its usage to only its own USB fast chargers and USB cables. Can’t this not be standardized in such a way that they can be made to work with all USB chargers and USB cables used with our smartphones?

The answer is yes. We do have a USB fast charging capability built into the USB C standards, covered under the category USB Power Delivery (or USB PD for short). This standard states that all smartphones and similar handheld devices such as Android tablets that comes built with USB Type C connectors and cables need to meet and support the USB Power Delivery (USB PD) specification.

The USB Power Delivery specification states that these smartphone/tablet or other handheld devices need to be capable of delivering upto 100W of power.

However, even then, many Android Original Equipment Manufacturers (OEMs) still do not support this USB C Power Delivery (USB PD) specification and still continue to use proprietary USB fast charging technologies.

But recently, Google is coming down hard on these OEMs and trying to enforce USB PD support for all the Android devices manufactured by them, atleast from Android 10 onwards. This, when achieved, should eventually make all Proprietary USB Fast charging technologies redundant and bring in the USB Power Delivery (USB PD) as the industry standard for USB fast charging technology.

When this happen, we will finally be able to move out of proprietary USB Fast charging technologies and be free to use any USB chargers with any USB cables to charge our Android smartphones and tablets and still be able to enjoy the USB fast charging functionality.

Until then, we will have to make do with the warning messages on our smartphone devices that reads “Device charging slowly use original charger” when connected with non original USB chargers and USB cables. 🙁