Replacing the battery on the Xiaomi phone: a complete guide with photos and tips

Replacing the battery on Xiaomi smartphones is one of the most popular procedures among users whose devices have served 2-3 years. The fact is that lithium-ion batteries lose up to 20-30% of capacity after 500 charging cycles, and in the budget models of Redmi and POCO this process is often accelerated due to the lack of thermal control, as a result, the phone discharges in a few hours, turns off at 30-40% charge or refuses to turn on.

In this article, we will analyze the step-by-step process of replacing the battery on any Xiaomi smartphone – from the flagship Mi 11 Ultra to the budget Redmi Note 10. You will learn how to choose the right battery, what tools you will need, how to avoid damage to the plumes and what to do if the phone does not turn on after replacing. QR-code that few people know about.

When it’s time to change the battery on Xiaomi: 5 clear signs

Many users have been inconvenient with the battery for years, unaware that it will cost less to replace it than to constantly buy powerbanks.

• 🔋 The phone's emptying on 50% more 2-3 Standby hours (without active use).
• 🔌 Charging jumps: for example, from 40% immediately drops to 15%, and then comes back.
• 🔥 The body is noticeably heated in the battery area even with minimal load.
• ⚡ The phone turns off when 20-30% charge and only activated after connecting to the charger.
• 📉 Settings menu → Battery state capacity shows less than 80% of the original (for example, 3200 mAh instead of 4000 mAh).

If at least two of these symptoms are on a regular basis, it is time to change the battery, and do not wait until it completely fails: a bloated battery can damage the screen or motherboard, which will lead to expensive repairs.

⚠️ Warning: If the phone case is swollen or there are gaps between the screen and the back cover - immediately turn off the device and do not use it until the battery is replaced.

What battery to choose for Xiaomi: original vs analogues

So battery choice is the most critical part, and many people make the mistake of buying cheap ones on AliExpress or in questionable stores.

How to distinguish the original Xiaomi battery from a fake?

• 🏷️ Sticker with QR-code and serial number (can be checked through the Mi Verify app).
• 🔧 Contacts are coated with gold spray, not oxidized.
• 📦 Packaging with hologram and production date (not older than 6 months).
• 🔋 The battery case shows the exact capacity (for example, 4520 mAh for the Redmi Note 11 Pro) and voltage (3.85V or 4.4V).

Where to buy it?

Official batteries are better to order in Xiaomi service centers or on the Mi Store website. Certified analogues can be found at trusted sellers on AliExpress (rated above 98%) or in stores like Beru, Svyaznoy. Avoid hand-held purchases - there is a high risk of running into a used battery.

Preparing for replacement: tools and safety

Before disassembling the phone, prepare everything you need, and without the right tools, you risk damaging the plumes, the screen, or the battery itself.

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, torx T3-T5).
• 🧲 Screen suction cup (diameter) 5-7 centimeter).
• 📱 Plastic mediators (2-3 (p.c.) to separate the shell.
• 🔥 Hair dryer or thermo-air station (for softening glue).
• 🛠️ Thin-ended tweezers.
• 🧴 Isopropyl alcohol (90%+) clean-up.
• 🔋 New battery (charged on the 30-50%).
• 📦 Container for screws (so as not to lose small parts).

Turn off the phone and remove it. SIM-map

Put the tools in order of use

Wear an antistatic bracelet (or touch a grounded object)

Prepare bright lighting (preferably a table lamp)

Take a photo of the internal structure of the phone before disassembly (in useful for assembly)

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Important: work on a flat, clean surface without carpets or fabrics that can electrify. If you don't have experience disassembling machinery, practice on an old smartphone or watch a video disassembly of your model.

⚠️ Warning: Do not use metal tools to tamper with the battery - this may cause short circuit.

Step-by-step: how to disassemble Xiaomi and replace the battery

The process of replacing the battery varies depending on the model, but the overall scheme is the same. We will consider a universal algorithm using the example of the Redmi Note 10 Pro (similar to most Xiaomi devices).

Step 1. Turn off and heat the body

Turn off the phone completely. Then evenly heat the back cover for 2-3 minutes (temperature no higher than 60°C.) This will soften the glue, and the cover will be removed easier. Don't overheat - you can damage the plastic or the screen!

Step 2. Remove the back cover

Suction stick to the bottom of the screen (near the charging connector) and pull up. Once the gap appears, insert a plastic mediator and gently swipe it around the perimeter, separating the lid. Be careful — in some models, the fingerprint scanner plume is attached to the lid!

Step 3. Shutting down the battery

Remove the metal shield (if you have one) and unplug the battery plume with tweezers. Never pull the wires! Take the connector and pull it up gently. If the battery is swelling, don't try to bend it, take it out.

Step 4: Remove the old battery

Put a plastic blade on the battery and slowly pull it up. If it's glued, put a thin plastic card under it and gradually separate it. In some Xiaomi models, the battery is glued to double-sided tape, and you can remove it with alcohol.

Step 5: Installation of a new battery

Check the contacts of the new battery for oxidation. If necessary, wipe them with alcohol. Set the battery in place, plug the plume and lock it (some models have a latch).

Step 6: Assembly of the phone

Make sure all the plumes are connected correctly, and secure the back cover. Screw the screws cross-to-cross to avoid distortion. Don't put too much effort into it, you can rip the thread off.

1. Correct connection of the battery plume (sometimes it flies off during assembly).

2. the presence of damage on the motherboard (blackened elements, bloated capacitors).

3. New battery charge (sometimes required) 5-10 minutes of charging before first switching on).-->

What if the phone doesn’t work after the battery is replaced?

Even if you did everything right, you can have problems. Let's look at the typical situations and their solutions.

If the phone doesn’t respond to charging, try a forced start:

1. Connect the charger.
2. Press the Power + Volume button up for 10-15 seconds.
3. If the Mi logo appears, release the buttons.

If nothing works, it's possible that the power plume or the charging controller was damaged during the disassembly, in which case you should contact the service center.

💡

90% of battery problems are due to improper connection of plumes or use of non-original batteries.Always check the compatibility of the battery with your phone model!

Calibration of the new battery: why is it important?

Many users wonder why the phone has an incorrect battery percentage or is discharged quickly after a battery change, because the power controller needs to be "trained" to work with the new battery.

1. Completely discharge the phone before automatically shutting down.
2. Connect the original charger and charge up to 100% without interruptions.
3. Turn off charging and use the phone as normal until it is completely discharged.
4. Repeat the charging-discharge cycle 2-3 times.

After that, the controller adapts to the new battery and the charge readings become accurate, and it is also recommended to disable battery optimization for critical applications (Settings → Battery → Battery Optimization).

To speed up the process, you can use the engineering menu:

1. Enter the dialer code: ##4636##.
2. Select Battery Information.
3. Click Clear Statistics (this will reset the data about the previous battery).

How much does it cost to replace the battery in vs service on your own?

The cost of replacing the battery in service centers depends on the model of the phone and the type of battery. Here are the current prices for 2026:

As you can see from the table, self-replacement saves you 30-50% of the cost of a service, but consider the risks:

• 🔧 Damage to plumes or screen (repair will cost you) 3-5 thousand. ₽).
• 🔥 Fire when the battery is not connected correctly.
• 📵 Loss of warranty (if the phone is warranty, it is better to contact the official service).

If you’ve never disassembled a phone, it’s best to practice on an unnecessary device or watch detailed video instructions for your model.

FAQ: Frequent questions about replacing the battery with Xiaomi