Why the OPPO F21s Pro 4G Discharges Quickly

Any smartphone requires a battery to work. Unfortunately, due to the laws of physics, humanity has not yet come up with an infinite source of energy, so the battery needs to be recharged with some frequency. A fully charged battery is able to provide the phone with energy for 6–12 hours of stable and constant operation. But in some cases OPPO F21s Pro 4G it discharges quickly, that is, it does not hold a charge for as long as the manufacturer promises. Most often, such a problem is not the result of a breakdown, but the result of the actions of the smartphone user.

Reasons for the rapid discharge of the OPPO F21s Pro 4G phone

A common reason why the battery on the OPPO F21s Pro 4G runs out quickly — we use the phone more typically than the manufacturer intended. If you read various manuals and technical maps from popular brands, you will find that the estimated working time was obtained under special conditions. Roughly speaking, the device will work for 24 hours only if you use it only for calls and keep the screen off all the time.

If a smartphone user uses it for other purposes, for example, to communicate on social networks, to play games, or to watch videos, then the working time will be inexorably reduced. Fortunately, now we have the opportunity to track which applications affect the battery of a smartphone on Android:

1. We go to «Settings».

2. Go to the section «Battery».
3. Click on «Battery charge consumption».
4. A list opens in which all applications that greatly affect the energy consumption of the smartphone will be listed. By limiting their use, you will partially or completely solve the problem with the rapid discharge of the device.

The second common reason — battery obsolescence. Each battery has a pre-calculated resource of use, which manufacturers indicate in the format of the number of full charge-discharge cycles. One of the most popular smartphones — the iPhone — has a battery life of only 500 cycles. That is, after about 1–2 years, the capacity decreases by 15-20%, and after 3–4 years it decreases by about half. As you know, the lower the capacity, the faster the smartphone will be discharged.

The third reason — battery or phone failure. The smartphone has a lot of small parts, the breakdown of which critically impacts the energy efficiency of the device. For example, the battery cable may move away, which is why the phone will stop starting at all. The battery casing may also crack or swell.

What to do when the phone is OPPO F21s Pro 4G discharges quickly

Take the methods listed below only as tips. We do not guarantee that by applying them you will fix the problem with the rapid discharge of the smartphone, as we do not know the reason this happens to your device. For example, reducing the brightness of the screen, which many sites indicate as a guaranteed way to reduce battery consumption, will not help you in any way in case of battery failure. Therefore, if you are faced with a strong reduction in the operating time of the smartphone, for example, instead of 8 hours, it began to work only 4, then immediately contact the service center.

Now let's go directly to the tips:

1. Reduce the brightness of the screen. For this:
   1. Open the top menu.
   2. Move the slider next to «Brightness» left.
2. Turn off all functions that you don't use. For example, Bluetooth, Wi-Fi, and Mobile Internet. For this:
   1. Open the top menu.
   2. Click on the icons of those functions that you do not plan to use in the near future.
3. Turn on the power saving mode. For this:
   1. Open the top menu.
   2. Find the icon «Power saving mode» and click on it.
4. Turn on the dark theme. For this:
   1. Open the top menu.
   2. Click on the icon «Dark theme».

See also: