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

Why Xiaomi’s battery fails and when to change it

Xiaomi smartphones are some of the most popular on the market due to their price-performance ratio, but even they are not immune to battery wear. The average battery life is 2-3 years when used actively, after which the capacity begins to fall rapidly. If your Redmi Note 10 or POCO X3 discharges in half a day, turns off at 20-30% charge or overheats during charging, these are sure signs that it is time to change the battery.

The manufacturer claims that Xiaomi batteries are designed for 500-800 charging cycles, but in practice this figure depends on many factors: temperature, use of fast charging, frequency of full discharges. For example, if you regularly leave your phone on charge for the night or use non-original adapters, the battery can fail in a year, in such cases, replacing is the only way to return the device to its previous autonomy.

It's important to distinguish between software and hardware problems. Before you disassemble the phone, check:

• 🔋 Battery status in the Settings menu → Battery status (available on MIUI 12 and newer. If the capacity has dropped below 80%, it's time to act.
• 🔌 Charging port performance. Sometimes the problem is oxidized contacts, not the battery.
• 📱 The presence of background processes that discharge the phone. Check in Settings → Battery → Battery utilization.

What tools will be needed to replace the battery

Replacing the battery in Xiaomi is a procedure that requires care and the right tools, without which you risk damaging plumes, displays, or even motherboards.

Pay special attention to the choice of a new battery. It is better to buy original Xiaomi batteries labeled MB- (for example, MB-10 for the Redmi Note 9), but they are often expensive. Alternatively, certified analogues from Anker, Baseus or Remax. Avoid cheap no-name batteries: they may swell or not meet the declared capacity.

⚠️ Attention: Do not use metal tools to lid the lid! They can scratch the body or damage the plumes. Plastic shoulder blades must be thin (0.1-0.2 mm) and flexible.

Turn off the phone and remove it. SIM-map|Make a backup of the data (in case of damage)|Charge your phone to at least 30% (for safety)|Prepare a workplace with good lighting|Wear an antistatic bracelet (optional but recommended)-->

Step-by-step: how to disassemble the phone and get an old battery

The disassembly process differs depending on the Xiaomi model, but the overall scheme is the same for most devices. Consider the universal algorithm using the example of the Redmi Note 11 (similar to the POCO X4, Mi 11 Lite and other modern models).

Step 1 Remove the back cover

Most Xiaomi smartphones have a glued cover, so it needs to be heated to soften the glue. Use a dryer at a minimum temperature (or a thermoplatform at 60-70°C) and warm up the edges of the phone evenly for 2-3 minutes. Then gently apply the lid with a plastic blade, starting at the bottom corner (where the charging connector is located). If the lid does not respond, warm up again.

Step 2: Spinning the screws

Once you remove the lid, you'll see a metal plate covering the insides of the phone. Unscrew all the screws (usually 8-12 pieces) with a PH00 cross screwdriver. The screws on different Xiaomi models can vary in length — remember which one was twisted from where so you don't get confused when you build it! Put them on a magnetic substrate or in a container with cells.

Step 3: Disconnection of plumes and batteries

Now you have to turn off the display, the camera, and the motherboard. They're attached to the latches -- gently put a plastic blade on them, then find the battery connector (usually at the bottom of the board, marked red or black) and disconnect it. If the battery is swelling, don't try to pull it out by force, it's dangerous!

How to install a new battery and collect the phone back

Installing a new battery is a critical step, and if you make a mistake with the connection or locking, the phone may not turn on or the battery will quickly fail.

1.Verification of the new battery

Before installing, check the new battery for damage, make sure its capacity and voltage match the old one (usually 3.85V or 4.4V for modern models). Xiaomi's original batteries must have a hologram and serial number.

Installation and fixation

Put the battery in the compartment and plug the connector into the motherboard, make sure the contacts fit tightly, then lock the battery in.

• 🔥 If the kit is double-sided tape - glue the battery, having previously cleaned the surface of the old glue with alcohol.
• 🔥 If you use heat glue - apply it around the perimeter of the battery in a thin layer and press on 10-15 seconds.

3. Assembly of the telephone

Collect the phone in reverse order:

1. Connect all the plumes (display, camera, buttons).
2. Set a metal plate and twist the screws (observe order and length!).
3. Stick the back cover. To be reliable, warm it up with a hair dryer and press it for 1-2 minutes.

⚠️ Warning: After the battery is replaced, the phone may not turn on immediately. That's OK! Connect it to charging on the 10-15 Minutes – sometimes it takes time to initialize a new battery.

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If the battery is too fast after replacing, calibrate: completely discharge the phone, then charge to 100% without interruption. Repeat the procedure 2-3 times.

Xiaomi models with non-removable battery: features of replacement

Some Xiaomi models have a special design that makes it difficult to replace the battery.

For models with a waterproof body (for example, Xiaomi 13 or Redmi Note 12 Pro)+) After the battery is replaced, you need to restore the leakage. UV-Without it, the phone will lose its moisture protection!

If you are not sure of your abilities, you should contact a service center. The cost of replacing a battery in official Xiaomi services starts from 1500 rubles (excluding the price of the battery), informal workshops can do this cheaper, but the risk of using non-original parts is higher.

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On frameless models (such as the Xiaomi Civi), disassembly requires experience, and an error can lead to cracks in glass or damage to the fingerprint plume.

Frequent Battery Replacement Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes that cause their phones to break down, and here are the most common ones and ways to prevent them:

• 🔌 Tangled screws, screws of different lengths can damage the motherboard, so you can arrange them in order or use a magnetic mat with markings.
• 🔥 Display plume damage, often with a slob in the slob, so you can only unplug the plumes with plastic tools.
• 💥 Puncture of the battery. It can cause fire! Solution: never use metal objects to retrieve the battery.
• 📵 If the phone doesn't turn on after assembly, check if the battery connector is tight.

Another common problem is that the new battery will blow up a few months after it's replaced.

• Use of cheap, uncertified batteries.
• Frequent charging "in a hurry" (fast charging reduces the service life).
• Operating the phone at extreme temperatures (below 0°C or above 40°C).

To extend the life of a new battery, follow these tips:

• 🔋 Avoid full discharge. Optimal range is 20% to 80%.
• ⚡ Do not use your phone while charging (especially for games or videos).
• 🌡️ Do not leave the device in the sun or near heat sources.

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After replacing the battery, reset the battery statistics in the engineering menu (enter ##4636## and select Battery information) to help the system calibrate the new battery correctly.

Where to buy a quality battery for Xiaomi: a review of trusted sellers

The battery quality of the phone is not only the battery life of the phone, but also the safety of the phone, and cheap fakes can swell, overheat, or even ignite.

When buying, pay attention to:

• 🔍 Marking – must match the original battery (e.g, MB-12 For the Redmi Note 10 Pro).
• 📦 Packaging – Xiaomi’s original batteries come in branded hologram boxes.
• 📋 Guarantee – Reliable sellers give at least 3 months.

If you buy a battery on AliExpress, check out store reviews. Good sellers usually have a rating of 98%+ and over 1000 sales. Avoid stores with suspiciously low prices (for example, a battery for 300 rubles is a clear sign of fake).

FAQ: Answers to Frequent Questions About Xiaomi Battery Replacement