The correct first charge Xiaomi Redmi 9: myths and reality

Buying a new smartphone is always an exciting moment, especially when you get a fresh Xiaomi Redmi 9 with its bright screen and powerful stuffing. However, before you dive into the world of applications and settings, the owner often asks: how to properly charge the device for the first time?

The Lithium Polymer battery owners that the Redmi 9 is equipped with need a completely different approach to operation. Mistakes in the first hours of use may not only not help, but also knock down the calibration of the power controller, which will lead to incorrect charging display in the future. Let's see which steps are really important and which are a relic of the past.

In this article, we will take a closer look at the algorithm for first activating your gadget’s power system, explaining why old battery pumping methods can be harmful, and how to set up MIUI so that your smartphone will serve you faithfully for years without losing capacity.

Dispelling myths about the “pumping” of the battery

There is a persistent myth dating back to the age of button phones that a new phone needs to be charged continuously for 12 or even 24 hours. For today’s Android and Li-Po battery devices, this advice is not only useless, but potentially harmful. Being charged for a long time after reaching 100% creates unnecessary thermal stress for battery cells.

The power controllers in Xiaomi Redmi 9 are equipped with intelligent protection that automatically stops the current supply at full charge. However, if you keep the device connected for days, micro-charge cycles can occur when the charge drops by 1%, and the system reaches it again to 100%, which leads to excessive heating, which is the main enemy of the battery’s chemical composition.

⚠️ Warning: Never leave a new smartphone to charge under a pillow or in the sun. Overheating during initial charging can irreversibly reduce battery life.

Also, don't try to completely discharge the phone before you start charging. Deep discharge below the critical threshold is bad for lithium cells. The best scenario is regular use: turned on, set up and charged as needed, without bringing to extremes.

Preparation for the first inclusion of Redmi 9

Before you plug in the cable, you need to do a visual inspection of the equipment. In the box with Redmi 9 you will find the smartphone itself, a clip for extraction. SIM-cards, protective case and charger with support for fast charging 18W. It is important to use the original power supply and cable, since cheap analogues may not provide a stable current, which is critical for primary calibration.

Check the USB Type-C connector for protective film or dust. If the device has been in storage for a long time, its battery may have run below the start threshold, in which case, when connected to the network, the screen may not catch fire immediately. This is normal: it takes a few minutes for the system to raise the voltage to a level sufficient to start the bootloader.

The ambient temperature also plays a role. If you bring your phone in from the cold, let it warm to room temperature for 30-40 minutes. Charging a cold battery can cause moisture to condense inside the case and damage to electronic components.

Next articleHow to charge Xiaomi Redmi 9 for the first time

The first charge process does not require complex manipulations, but following the sequence of actions will help the system correctly determine the real capacity of the battery. First connect the cable to the power supply, and then insert the plug into the smartphone connector, which avoids the voltage surges that sometimes occur when connecting to an already running network.

Once connected, you'll see a lightning animation on the screen. If the phone has been completely discharged, it can turn on automatically or require a short press of the Power button. Wait for the operating system to boot. During the initial setup, MIUI consumes a significant amount of power, so it's best to leave the cable connected until all activation steps are complete.

When you reach your desktop, check the charge indicator. If it shows 100%, you can turn off the device. If less, continue charging until the scale is full. Once you reach 100%, it is recommended to hold the phone charging for another 15-20 minutes to balance the cells, but no more.

It is important not to interrupt the system update process if it starts while charging.Redmi 9 firmware may require an update immediately after turning on, and interrupting this process on low battery power may result in software failure.

Features of fast charging in Redmi 9

The Redmi 9 supports fast-charging technology, which significantly reduces the recovery time. However, in the first cycles, the system can behave conservatively, limiting the current to protect the new battery. Don't be afraid if the charging speed in the first days will seem to you not as high as advertised in the advertisement.

The power controller gradually learns by analyzing user behavior and temperature. To activate the maximum speed, make sure the screen is turned off. Many users are unaware that when using the screen actively while charging, the energy replenishment rate can decrease by 30-40% due to heat limitations.

Using unoriginal cables often blocks fast charging mode. MIUI detects the cable resistance and, if it is above normal, switches to standard 5 Volt mode for safety.

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To extend the life of the Redmi 9 battery, try not to charge the phone to 100% every day, the optimal range for daily use is from 20% to 80%.

Battery calibration and MIUI setting

After the first full charge, it is recommended to calibrate the battery indicator to display the correct data. Although modern controllers are smart, sometimes the software counter can get knocked down.

Then, without turning on the screen, charge the device to 100%. Once the green indicator or full charge sign lights up, don't turn off the cable for another hour, which will help the system write the upper and lower limits of the capacity into the controller's non-volatile memory.

The Xiaomi Redmi 9 has some useful features to extend battery life. Go to Settings → Battery → Battery Protection. Here you can activate the overnight charging optimization option, which slows the battery filling process after 80%, to complete it just in time for your wake-up.

Also worth paying attention to the background activity of applications: in the first days after buying Google Play Services and system applications are actively updated, which can cause a quick discharge. Give the phone 2-3 days to “stabilize” processes before drawing conclusions about battery life.

Common mistakes in the operation of a new smartphone

One of the most common mistakes is using the phone during heavy charging, especially in heavy gaming.The combination of the load from the processor and the charging current causes a strong heating that degrades the chemical composition of the Li-Po element faster than years of quiet operation.

Another mistake is ignoring firmware updates. Early versions of software preinstalled in the factory may have errors in power management algorithms. Xiaomi regularly releases patches that improve the power controller, so timely updates are a must.

⚠️ Warning: Do not use your phone if you notice a bloated back cover or screen, which is a sign of a chemical breakdown inside the battery and further use is dangerous.

You also don't want to keep your phone connected to the grid after reaching 100%, and although the controller does cut off the current, micro-discharges and subsequent finishes keep the battery in a state of constant voltage, which is not desirable for long-term cell health.

FAQ: Frequently Asked Questions

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Temperature compliance and the use of original accessories are the main factors affecting the battery life of your Redmi 9.