What is fast charging? As the name suggests, fast charging means your cell phone will be fully charged with the shortest time.With the development of smart phones, more and more people rely on mobile phones. People use it to watch TV, read news, do shopping and chat. Fast charging becomes more and more important. However, each phone has its limited electricity .When the phone is power off, it is not convinient for us to do anything.In order to avoid unnecessary trouble, we need fast charging.
So, how does they work?
When charging a device, these batteries rely on a power current from your wall outlet through your USB cord plugged into your phone to be charged.
Quick Charge 2.0 is a standard that was developed by a company called Qualcomm, Quick Charge 2.0 are able to charge up their batteries at a quicker rate than phones without it.Qualcomm Quick Charge 2.0 technology is upgrade of Quick Charge 1.0.Qualcomm Quick Charge 2.0 use the new specification. By simultaneously increasing the current and voltage to improve the speed of charging .
Qualcomm’s Quick Charge technology primary focus was to maximize phone charging transfer while being efficient. Quick Charge 2.0 allows for charging power levels of 36 watts in certain situations. Qualcomm split Quick Charge 2.0 into two classes to differentiate device, Class A and Class B. Class A applies to smartphones, tablets, and other small portable products while Class B caters to devices not used by the mass market.
Class A devices supporting Quick Charge 2.0 allow for a maximum charging current of 3 Amps depending on the source of the current. A typical smartphone charger runs at 5 volts and drawing about 3A of current. Theoretically, Quick Charge 2.0 can boost up to 15 watts of power from a 5 volt power supply which results in a faster charging time.
Class A devices have also been designed to work with 5, 9, and 12 volt power sources making them more compatible with a wider range of power sources. This means that a single charger will be able to cater to wide range of devices while delivering fast charging times. This also means that voltage loss from very long cables or a poor quality cable can be minimized as well.
Last but not least, in order to Quick Charge 2.0 to actually work there are a few things that you need. Your phone itself must support the Quick Charge 2.0 feature, your charger must be a Qualcomm Quick Charge 2.0 charger, and a good quality USB cable.
Frankly speaking, if you think Quick Charge 2.0 is inconvenient，this Power Bank will give you surprise.