What Is VOOC Charging? How Does It Help Smartphones In Fast Charging?

In today’s scenario, smartphones are shared among everyone. Moreover, the usage and need for smartphones are gradually increasing. A few years back, the swollen batteries were reported in high numbers. But smartphones stopped using those models of battery and produced more efficient batteries. There are only two types of batteries used in modern cell phones Lithium Polymer and Lithium-ion in terms of chemical composition. Li-Poly is the latest and most advanced technology for cell phone batteries.

What is VOOC charging?

Developed and introduced by OPPO Electronics in 2014 A.D, VOOC is a fast charging technology without overheating the device. It was designed to increase the device usage time by charging quickly in a short timespan.

We charge our device when the charge percentage gets depleted. So, we plug the charger into the phone and charge the device. The charger recharges the battery. Here, the charger uses the electricity power in your house, converts it into the correct levels, and puts it back into the battery. The energy that’s transferred in the mobile phone is calculated in Watts.

Scientifically, WATTS = AMPS * VOLTS

Generally, a USB port runs at5 Volts at 0.5 AMPS. 

So, 5V * 0.5 A = 2.5 WATTS

That’s how much USB port can supply energy to a device. Now, a fast-charging might run around 5 Volts and 2 AMPS.

 i.e, 5*2 = 10 AMPS of energy. Comparatively, that’s four times greater than what we can expect from a normal USB port.

A quick charging system runs at around 9 Volts but a lower current of 1.67 AMPS.

I.e, 9V * 1.67A = 15 WATTS 

So, we got 2.5 W, 10 W, and 15 W for a quick charging system. But VOOC is a bit different, and it still runs at 5 Volts but 5 Amps.

I.e, 5V * 4A = 20 WATTS of energy. 

The VOOC charging system runs at 5 Volt but delivers 20 Watt of energy to the battery.

How does it differ from a Normal charging system? How is it better?

Batteries are usually charged in two stages. At the first stage, the battery is charged up to 80%, and it’s done in high power and can be done quickly. After that, the charge percentage reaches 100%, and that’s done at a much lower level of energy. 

That’s why many phone manufacturers talk about how quickly they can charge the respective device up to 75-80%. The phone manufacturers are talking about the first charging stage, which is very quick with high power.

An average phone will heat up by 8 to 12 degrees while charging. But, surprisingly, VOOC Charging will produce less heat. In general, the temperature rises while charging is up to 3 degrees. It’s more than half, as compared to other mobile devices.

If you are fond of watching movies or playing games for a more extended period, you haven’t reached the endpoint. So, you can charge the phone for a few minutes as it charges quickly within minutes and continues your activity.

But, if you use your phone simultaneously while charging. Then, there will be a slight drop in charging efficiency. The video or game you are playing uses a high CPU and GPU, which eventually produces heat. And as mentioned earlier, while charging the mobile phone, its temperature rises. 

So if the smartphones are used and charged simultaneously, they drop down from quick charging mode to normal mode and reduce the amount of heat produced. But as a result, they take longer to charge. 

But, in the case of VOOC charging, you can watch videos and charge your device simultaneously. Still, the phone gets charged at the same rate as it charges when the phone is off.

For example:

In Oppo f17 pro, it takes 81 minutes to get 100% charged, and also, it takes 81 minutes to get 100% charged while you are watching a video. (proven test result)


VOOC rapid charging system can be beneficial for smartphone users whose usage time is high. It can also be helpful for users who use the application with high CPU and GPU consumptions. Eventually, it will lead the smartphone space in a new direction. Fast charging is never a bad option, and it’s practically proved by the VOOC charging technology.

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