Android Fast Charging Feature



The chipset manufacturing giant QUALCOMM introduced FAST CHARGE feature in the market by the end of 2015. Fast charging technology is a really helpful feature for the heavy mobile user. We researched on what is Fast Charge and its working phenomena for our fans to explain how it works and is it really helpful or not:



The idea of FAST CHARGE or QUICK CHARGE lies in its name “Its charge up your handset quickly”.
You're likely to find Quick Charge 3.0 (and earlier versions) in devices that have Qualcomm's own processors (Snapdragon 430 and above, mostly), but several manufacturers have also licensed the technology and released it in their phones under different names, such as Samsung's "Fast Charging" or ASUS' "Boost Master." As far as chargers and batteries go, it's easy to find ones that are certified to work with the standards.

You've probably noticed that your phone or tablet will charge much slower when it's connected to a PC or laptop's USB port than when it is to a mains power adaptor. And you may have noticed your phone will charge faster when connected to the charger that came with your tablet. That's because different chargers have different power outputs.

We calculate the wattage by multiplying the current (the number of amps) and the voltage. So, if your charger is specified at 5V, 1A, it can supply 5W. If it is specified at 5V, 2A it can supply 10W.
The thing we need to understand here is that different charge are made for different purpose and are differently equipped.

At its most simple level, Quick Charge allows for high levels of current to flow to the battery, in an attempt to maximize its charging efficiency. The latest Quick Charge products also tend to charge their batteries at higher voltages, allowing for a higher rate of power transfer through commonly found cables. However, both the phone and the charger must be compatible with the same charging voltages and currents. Your phone may support charging at 9V/2A, but if you only have a 1A charger then the process will take longer. Likewise, plugging a 2A charger into a phone that can only accept 0.7A won’t make it charge any faster.

Quick Charge 3.0

Qualcomm boasts a fourfold increase in charging times over conventional chargers with Quick Charge 3.0, up from the 40 percent speed increase offered by its first generation technology. However, one of the interesting things to note is that Qualcomm isn’t touting massive increases in charging times over version 2.0, instead the company is focusing on improved efficiency this time around.

The major new feature with 3.0 is INOV (Intelligent Negotiationfor Optimum Voltage), which allows for a fined tuned power output and a more optimized charging cycle. Firstly, different batteries require different charging voltages. Version 2.0 supported four modes at varying power levels, 5 volts/2amps, 9V/2A, 12V/1.67A, and a 20 volt option. Quick Charge 3.0’s INOV communicates with the device to request any voltage between 3.2V and 20V at 200mV increments, allowing for a wider selection of voltages.

INOV has the added benefit of being able to dynamically adjust the charging voltage over the battery charging cycle. As a battery charges up, it slowly draws less and less current, which is partly why it takes longer to charge the last 20 percent than the first. Qualcomm states that its new technology allows the phone to request just enough voltage to reach the desired charge current, thereby maximizing efficiency.

This is useful as it reduces the amount of energy wasted during charging. Previously, extra power not used to charge the battery would be lost as heat, warming up your phone and reducing the longevity of the battery. By exerting more control over charging efficiency, less power is wasted, resulting in less heat. Qualcomm states that version 3.0 is up to 38 percent more efficiency than 2.0, which is a substantial energy saving.

3.0 vs 2.0 vs 1.0



Importantly, Qualcomm has retained backwards compatibility with its 2.0 and 1.0 standards. As the power draw is handled on the smartphone side, you will safely receive the maximum amount of power for your device using any of the certified chargers. However, you won’t achieve full charging speeds if you try charging newer phones with older lower power chargers.

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