How to turn off the Xiaomi battery: the complete guide

Xiaomi smartphone owners, including Redmi and POCO sub-brands, often face situations where a complete power outage is required, which may be necessary to deep-reset MIUI or HyperOS operating system errors, perform repairs, or simply to save charge during long-term storage of the gadget. Unlike battery extraction, a software shutdown does not break the physical power chain completely.

Many users mistakenly believe that the standard menu shutdown procedure is enough to completely isolate the battery. In fact, even when it is off, modern smartphones continue to consume minimal energy to track buttons or chargers. To completely break the circuit, you need to perform a number of specific actions, which will be discussed in this article.

So let's look at everything from software to physical interventions in the design of the device, and it's important to understand that doing the wrong thing with lithium polymer batteries can cause damage to your smartphone or even injury, so follow the instructions and follow the safety precautions when you're working with electronics.

Software methods of complete power outage

The easiest and safest way for every user to use is to use the standard operating system features, but not everyone is aware of the hidden power of the shutdown menu. Some versions of MIUI firmware include an option that allows you not only to turn off the phone, but to put it into a deep sleep state as close as possible to a physical shutdown.

This requires you to press the power button before the menu appears, and you'll have options on the screen, and if you have a fresh version of the shell installed, try pressing the switch off button again or holding your finger on the Turn off icon, which in some cases activates a mode where all background processes and radios are turned off more aggressively than when you turn off normally.

It's worth noting that even this method doesn't guarantee 100% circuit breakage, because the power controller keeps on waiting, but that's enough to solve most software failures, like touchscreen getting stuck or communication module failure, and if software methods don't work, you'll have to resort to more radical measures.

⚠️ Warning: Don’t try to use third-party apps from Play Market that promise to “turn off the battery completely”; most of them are fakes and only mimic the process, and in the worst case, they may contain malicious code.

There is also an engineering menu that can be accessed through a special code set in the Phone app. Enter ##6484## to enter the test mode. Here you can check battery status and perform some diagnostic tests, but there is usually no direct command to physically shut down the battery in the standard engineering menu, as this is a hardware-level feature.

Physical Disconnection: Preparation and Tools

If the software is powerless or your goal is to replace the battery, you need to physically blur the circuit, and that requires opening the case of the smartphone, which automatically deprives you of warranty if the device is in warranty service, and you need a set of special tools to perform the operation.

First of all, you need a suction cup to neatly separate the back cover or display, depending on the design of the model, you also need plastic shoulder blades (mediators) to avoid damaging the body, and a set of screwdrivers with various nozzles, most often Torx or Phillips. Don't forget to prepare plastic tweezers to work with the plumes.

Before starting work, be sure to remove SIM-If you have a card and a memory card, this will prevent them from being accidentally damaged during the disassembly process. 15-20%, because working with a fully charged battery increases the risk of fire in case of accidental damage.

Step-by-step instructions for disconnecting the plume

The physical shutdown process begins with the rear panel being removed, and if your smartphone has a glass back cover, it needs to be preheated with a special heating pad or hair dryer (carefully without overheating the screen) to 60-70 degrees, which will soften the glue that holds the lid.

Once you remove the lid, you'll see the internal layout of the device. In most modern Xiaomi models, the battery is covered with a plastic protective plate or located under the motherboard. You'll need to unscrew all the visible screws that hold the protective screens and the board itself.

The key is to find the battery connector, which is a connector that has a wide plume inserted into it, and in no case pull the wire or the battery itself, and to turn it off, use a plastic blade or nail, gently lifting the connector up.

Once the plume is turned off, the smartphone is guaranteed to be de-energized, and you can now do the necessary manipulations, such as replacing the battery, resetting the controller errors, or storing the device without risking self-discharge, and then you can do the reverse assembly, but you have to plug the plume in and test the performance without twisting the screws.

In some flagship devices, battery access is possible only after the motherboard is dismantled, which requires high qualifications. If you are not confident in your abilities, you should contact a service center.

Resetting of the power controller (Fuel Gauge)

Often, when users say "how to turn off the battery," they mean resetting the power controller statistics, and this is true when the phone shows the wrong percentage of charge or suddenly turns off at 20-30%, in which case physical shutdown of the plume is the most efficient calibration method.

The idea is that when a circuit is physically broken, the controller loses short-term memory and then recalibrates the calibration cycle the next time it is turned on, and you need to turn off the battery plume, as described in the previous section, wait 10-15 seconds, and then plug it back in.

Once connected, take your time to turn on the phone. Connect the original charger and leave the smartphone off for 1-2 hours. This will allow the controller to correctly determine the real capacity and voltage of the cell.

⚠️ Warning: After the controller is reset, the first couple of charge-discharge cycles may not work smoothly.

Storage and preservation of the device

If your goal is to preserve your smartphone for a long time, simply turning it off will not save the battery from deep discharge.Lithium-ion batteries are prone to self-discharge, and if the voltage falls below a critical threshold (usually 2.5-3.0 V), the chemical processes become irreversible and the battery will fail.

For long-term storage (over 1 month), it is recommended to charge the battery to 50-60%, which is the most stable chemically, after which you need to physically disconnect the battery plume from the motherboard, this will completely stop the energy consumption of system components.

Store the device disconnected should be in a cool place, away from direct sunlight and heat sources. The optimal storage temperature is from +10 to +20 degrees Celsius. Every 3-6 months, it is recommended to connect the battery, check the charge and recharge to 50-60% if necessary, then turn off again.

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Use a dielectric tape or a piece of plastic to isolate the plume's contact during long-term storage, which will prevent accidental closure if the connector touches metal parts of the case.

Recovery after deep discharge

Xiaomi’s battery is discharged to zero and no longer responds to charging, in which case the power controller blocks the input current for safety purposes. Physically shutting down and reconnecting the battery sometimes helps wake up the controller.

If the plume is not responding to the charger, try using the push method, which requires a laboratory power supply with voltage and current adjustment, which is only possible for experienced craftsmen, and the battery contacts are supplied with a voltage equal to the nominal (usually 3.7-4.2 V), low current (0.1-0.5 A) for a short time.

At home, you can try to leave the phone on the original charger on the 12-24 Sometimes the microcurrents that the controller does pass gradually raise the voltage to a level sufficient to start the system, but if the battery has been in deep discharge for more than six months, it will probably have to be replaced.

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Physical battery shutdown is a radical but effective measure for resetting power controller errors and preserving the device, requiring caution and special tools.