How to replace the battery on the smartphone Xiaomi: a complete guide with photos and videos

Replacing the battery on the Xiaomi smartphone is one of the most popular procedures among owners of older devices 2-3 Even the most reliable models like the Redmi Note. 10 Pro, POCO X3 Pro or Mi 11 over time, they begin to hold the charge for only a few hours, and sometimes completely turn off when 30-40% The reason is the degradation of lithium-ion cells, which lose their capacity after they're released. 300-500 charge-cycle.

In this article, you will find step-by-step instructions for replacing the battery on any Xiaomi smartphone, including new models. 2023-2026 We'll tell you how to choose a good battery, what tools you need, how to properly disassemble your phone without damage, and what to do after you install a new battery, and you'll also learn when you should go to the service center, and when you can do it yourself.

Average replacement time is from 30 minute 1.5 The cost of a new battery varies from model to experience. 800 before 3 500 ruble-in 2-3 But remember, if you don't replace them properly, they can damage the plumes, lose their leakage, or even fire when you use a poor battery!

How to know if the battery is time to change: 5 key signs

Before you start replacing, make sure the battery is the problem, and here are the exact symptoms that indicate battery wear:

• 🔋 Phone's running out of power. 2-3 hours in normal use (social networks, instant messengers, calls).
• 📉 The percentage of charge “jumps”: for example, from 40% immediately drops to 15% after a reboot.
• 🔌 The device does not turn on without a charger connection, even if it shows 10-20% charge.
• ⚡ The phone gets hot when charging or playing (over 45).°C. Data from applications like AIDA64).
• 🛑 Diagnostic applications (e.g. AccuBattery) show a capacity of less than 70% of the factory capacity.

If at least 2-3 The battery needs to be replaced, but before you do, check the software for quick discharge:

1. Go to Settings. → Battery → Using a battery and looking at which applications use the most energy, maybe it's the software, not the hardware.
2. Update the firmware to the latest version – in new versions MIUI often optimize energy consumption.
3. Reset the settings to factory (Settings) → The phone. → Resetting settings. This will help eliminate the impact of user settings.

⚠️ Warning: If the phone is swollen (the screen or back cover is raised), DO NOT try to disassemble it yourself! The billowing battery may ignite if punctured. Immediately take the device to service or dispose of it according to the rules for recycling lithium-ion batteries.

2. Battery selection: original vs analogues, where to buy and what to look at

The quality of the battery not only determines the life of the phone, but also your safety. Cheap fakes can swell, overheat or even explode. Here are the criteria for choosing a good battery for Xiaomi:

Where to buy:

• 🛒 Xiaomi’s official services are a guarantee of the original, but the price is higher than the market.
• 🌍 AliExpress (sellers rated 98%+) — It's cheaper, but you're at risk of getting faked.
• 🏬 Local parts stores (for example, Chip and Deep, Amperka) - you can touch the product before buying.

How to check the originality:

1. The battery must have a holographic sticker with a serial number.
2. The original packaging has a factory seal and a barcode, which can be checked on Xiaomi’s website.
3. The battery weight should be consistent with the factory weight (for example, 45-50 g for the Redmi 9).

3. Tools required: what will be needed to replace

To replace the battery with Xiaomi, you need a minimum set of tools, without which you risk damaging the plumes, the screen, or the battery itself.

• 🔧 Plastic blades (2-3 Pc.) - for careful slinging of the lid and plumes.
• 🔨 Screwdriver kit: cross-haired (PH00), star (T3, T4), flat (1.5 mm).
• 🔥 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C).
• 🧲 Magnetic mat or bowl - so as not to lose cogs.
• 🩹 Insulation tape or glue B-7000 — fixing.
• 📱 Suction (optional) – helps to remove the screen on models with adhesive display (for example, Mi 11).

If you are using your phone for the first time, we recommend you to buy:

• 📸 Lunch or magnifying glass – so as not to miss small details.
• 🎥 Smartphone to capture the process – so you can rewind if something goes wrong.

⚠️ Warning: Don't use metal blades or knives to lid the lid! They can close contacts on the board and knock the phone out. Plastic mediators are safer.

4. Step-by-step instructions: 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 analyze the universal algorithm using the example of the Redmi Note 10 Pro (similar to the model). POCO X3, Mi 10T For models with a fixed lid (for example, Mi 11) will require an additional step - warm-up hair dryer.

Step 1. Turn off the phone and remove the back cover

1. Turn off the device and remove the tray for SIM-map.
2. Warm up the edge of the back cover around the perimeter (1-2 minutes). The glue will soften, and the cover will be removed more easily.
3. Insert a plastic spatula into the gap between the lid and the body (start at the bottom corner) and gently tuck in.
4. Swipe around the perimeter with a spatula until the lid is removed. Don't force it, if it doesn't, warm it up again.

Step 2. Turn off the battery plume.

1. Remove the metal protection (if any) – it is attached to the 4-6 screw.
2. Find the battery plume (usually black, with the inscription) BATTERY).
3. Carefully put the jack on a plastic blade and disconnect the plume. Don't pull the wires, just the connector!

Step 3: Remove the old battery

1. The battery is glued to the body, and you can put it in a plastic blade from any angle.
2. If the glue is too strong, heat the battery with a hairdryer (no higher than 60).°C!).
3. Remove the battery and clean the installation site of glue residues with alcohol.

Step 4: Install a new battery

1. Make sure that the new battery matches the size and connector.
2. Stick bilateral tape or apply glue B-7000 backside.
3. Connect the plume to the motherboard and lock the battery.

Step 5. Get your phone together.

1. Install a metal shield (if any).
2. Stick the back cover. To be reliable, warm it up with a hair dryer and press it for 1-2 minutes.
3. Turn on the phone and check the charge.

5. Features of replacement on popular Xiaomi models

Some Xiaomi smartphones have unique nuances when replacing the battery, and we have collected key differences for popular lines:

For models with a dual-pillar battery (for example, the Mi 11 Ultra), the process is more complicated:

• 🔋 We need to shut down both battery plumes.
• 🔧 More glue is needed to fix new cells.
• ⚡ After replacement, be sure to calibrate the battery (discharge to 0% and charge to 100% without interruptions).

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Before disassembling, take a picture of the location of all the plumes and screws, which will help to properly assemble the phone back, especially if you are doing repairs for the first time.

6.What to do after replacement: calibration, testing and care

Installing a new battery is only half the battle, and in order for the battery to last, you have to set it up properly and monitor the condition.

1. Battery calibration

1. Completely discharge the phone before automatically shutting down.
2. Charge up to 100% without interruption (use the original adapter).
3. Repeat the cycle 2-3 times, which will help the controller to correctly determine the capacity.

Verification of work

• 📊 Install the AccuBattery app and check the actual capacity (should match the stated capacity).
• 🔌 Make sure the phone charges and discharges evenly (no percentage spikes).
• 🌡️ Watch the temperature - the norm is up to 40°C when charging.

3. Operational rules

• 🔌 Don’t use cheap charging – it ruins the battery.
• 📴 Avoid full discharge (it is optimal to keep the charge between 20% and 80%).
• 🌞 Do not leave your phone in the sun or in your car in the summer.

⚠️ Note: If after replacing the phone began to discharge faster than with a new battery, check: - Is there a closed contact somewhere (for example, metal protection concerns the board). - Is the battery plume connected correctly. - Is not installed energy-intensive software (viruses, mining applications).

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Calibration of the battery after replacement is mandatory! Without it, the charge controller may show an incorrect percentage, which will lead to premature wear and tear.

7. Frequent mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing the battery.-5 Failures and How to Prevent Them:

• 🔧 Shooting the screws, use high-quality screwdrivers and don't use excessive force. If the screw doesn't go, drop it. WD-40.
• 🔥 Overheating the battery with a hairdryer - heat no longer than 2 minutes and at a distance of 5-10 cm The temperature is above 80°C will damage the battery.
• 📱 Display plume damage: Don't push the screen with metal tools. Use a suction cup.
• 🔌 Incorrect connection of the plume - always check the polarity (plus / minus on the connector).
• 🧹 Getting garbage inside the case – work on a clean desk and use a vacuum cleaner to remove dust.

If you've made a mistake:

• 🔧 Tore the screw. → Try to twist it with tweezers or drill it (at last).
• 🔥 Battery overheated. → Let it cool for 10-15 minutes before installation.
• 📱 Damaged the plume. → Replace it (costs 200-500) ₽).

The most common problem after self-replacement is that the phone doesn't turn on.

1. The battery is not connected (check the connector).
2. Closed contacts on the board (look for foreign objects).
3. The motherboard is damaged (if it was shortened during disassembly).

8. When is the best time to contact the service: 3 cases

It's not always possible to replace the battery yourself, but here are the situations where you can trust the professionals:

• 🔧 Complex design – for example, Xiaomi Mix 4 or Black Shark with non-standard battery mount.
• 🔥 Bloated battery - the risk of ignition when self-extracting.
• 📱 Damage to the board - if something is closed during disassembly or the phone does not turn on.

Replacement cost in the service:

Benefits of service:

• ✅ Work guarantee (usually 3-6 months).
• ✅ Diagnostics of other faults (for example, charging connector).
• ✅ Use of original spare parts.

Disadvantages:

• ❌ More expensive than a self-substitution.
• ❌ The risk of running into unscrupulous masters (use cheap analogues).

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If you are not sure of your abilities, do not risk it! Damage to the board when replacing yourself can cost 5-10 times more than service.

FAQ: Answers to Frequent Questions