19 Jun 2020
Nowadays phone batteries are larger than ever before, they could be as large as 10000 Milliamp Hours, and the new industry-standard is 5000 mAh. Charging your phone by plugging it simply to your computer USB port is not sufficient anymore and top brands like SAMSUNG, APPLE, QUALCOMM or OPPO needed to invent a faster way of phone charging, so they introduced fast charging protocols. This is quite a complicated matter, but in this article, I will explain it accessible way, so everybody will be able to fast charge their mobile devices with maximum speed.
To understand the whole matter of fast charging, firstly we need to go back to school and recall, that unit in which we measure electric power is Watt, and to calculate the amount of energy which you are actually putting in smartphone battery you need to multiply current with voltage. It is very easy, for example, if you are charging with 1 Ampere current and 5 Volts voltage you are charging your phone with 5 Watts of power. We are not calculating any energy losses on charger or cable, because there are insignificant.
Now, when you can measure charging power, you can understand what fast charging protocols actually are. They are data protocols to communicate between the charger and charged device to define maximum current and voltage to charge the battery at a specific moment of time. To put things in a more human perspective you can imagine that your phone and charger are talking together and negotiate maximum power to charge battery fast, but not too much, to not overheat a battery or destroy them. There are few fast charging protocols, to define which one of them your phone is using, you need to know basically two things, phone brand, and CPU type, then just check the table below.
|Name||Phone brand||CPU manufacturer||Maximum power|
|USB 2.0||any type||any type||2.5 W|
|USB 3.0||any type||any type||4.5 W|
|USB Type C||any type||any type||15 W|
|Quick Charge 3.0||any type||Qualcomm Snapdragon 427, 430, 435, 450, 617, 620, 625, 626, 632, 650, 652, 653, 665, 820, 821||36 W|
|Quick Charge 4.0||any type||
Qualcomm Snapdragon 630, 636, 660, 710, 835
|Quick Charge 4+||any type||Qualcomm Snapdragon 670, 675, 712, 730, 730G, 845, 855, 865||100 W|
|Samsung Adaptive Fast Charging||Samsung||any type||18 W|
|Motorola TurboPower 30||Motorola||any type||30 W|
|MediaTek Pump Express 4.0||any type||MediaTek after 2019||30 W|
|OnePlus Warp Charge||OnePlus||any type||30 W|
|Oppo Super VOOC||Oppo||any type||50 W|
|Huawei SuperCharge||Huawei||Kirin CPU||40 W|
|USB Power Delivery||any type including Apple||any type||100 W|
|SuperDart||Realme||any type||65 W|
You don't need to know all the details and numbers about fast charging, just when you want to achieve a maximum possible charging power, check the name of fast charging protocol which your smartphone supports and buy compliant fast charger and cable.
By Maciej Korzeniowski on 19 Jun 2020
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