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

Replacing the battery on Xiaomi smartphones is one of the most popular procedures among users whose devices have served 2-3 years. Even the most reliable models like the Redmi Note 10 Pro or POCO F3 eventually begin to show signs of battery wear: fast discharge, sudden shutdowns at 20-30% charge, overheating during charging. If your phone began to “land” in half a day instead of the usual 1.5-2 days, it’s time to think about replacing the power source.

In this article, we will look at the whole process from A to Z: how to diagnose a battery malfunction, what tools you will need to disassemble, where to buy a quality battery and how to install it without risking damage to the phone. We will separately focus on the nuances for different Xiaomi series - from the budget Redmi to the flagship Mi and POCO. And if you have never held a screwdriver in your hands, tell us whether to contact the service center and how much it will cost in 2026.

Signs of battery wear on Xiaomi: when is it time to change?

The lithium polymer batteries that are installed in Xiaomi smartphones are designed for 300-500 full charge cycles, and then the capacity begins to fall steadily, first by 10-15%, then by 30-40% of the original one.

• 🔋 Phone's running out of power. 4-6 hours with moderate use (social networks, messengers, calls).
• 🌡️ The case is very hot during charging or when running resource-intensive applications (games, video).
• ⚡ Charge "jumps" (for example, with 30% straight away 1% or the phone is turned off when 15-20% leftover).
• 🔌 Charging takes in 1.5-2 Time is longer than before (for example, instead of 1.5 hours — 3-4 hour).
• 📉 Settings menu → Battery condition shows capacity less than 80% of the original.

If you see at least 2-3 signs from the list, the battery definitely needs to be replaced. Especially critical symptom with a "jumping" charge: this indicates damage to the battery controller, which can lead to a sudden failure of the phone at the most inopportune moment.

⚠️ Warning: Don't ignore battery bloating! If the phone's body starts to "burn" (gaps between the screen and the frame, bulges on the back cover) - immediately turn off the device and do not use it until the battery is replaced.

What tools will you need to replace?

To replace your battery on Xiaomi, you will need a minimum set of tools, most of which can be bought from Chinese online stores (such as AliExpress) or specialty electronics repair shops.

If you plan to change the battery regularly (for example, repairing phones), it makes sense to buy a set for disassembling smartphones - it will cost you a lot. 800-1500 ₽ It includes all the tools you need. For a one-time replacement, you can limit it to a screwdriver, a shoulder blade and a sucker.

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Before disassembling your phone, make sure to back up your data! Even if you don't plan to touch the motherboard, there's always a risk of damage to the plumes or accidental power outage. Use Settings → Google → Backup or programs like Mi PC Suite

How to choose a high-quality battery for Xiaomi?

The choice of battery is a huge factor in how long your phone will last after you replace it, and unfortunately, the market is full of fakes and low-quality analogues that can not only fail quickly, but also damage your smartphone.

• 🔍 Each Xiaomi model has its own battery number (for example, for the Redmi Note 9 Pro — MBJ4061). Check it on the old battery case or in the technical documentation.
• 🏭 Manufacturer.Official suppliers for Xiaomi — ATL (Amperex), Sunwoda, Desay.avoid no-name brands.
• 📦 The original batteries come in sealed packaging with a hologram and QR-authentication.
• 🔋 Capacity: Must match the factory capacity (e.g. 5020 mAh for POCO X3 Fakes often have an understated capacity.
• 💰 The original battery can't be cheaper. 800-1000 ₽. Too low a price is a sign of counterfeiting.

Where to buy it?

• 🛒 Official service centers Xiaomi – a guarantee of the original part, but the price is higher 30-50%.

⚠️ Warning: Don't buy batteries labeled "Ultra Capacity" or "Enhanced Version" is a marketing hoax. The actual capacity of these batteries is rarely higher than the factory capacity, and often even lower!).

Step-by-step: how to replace the battery on Xiaomi?

The battery replacement process varies depending on the phone model, but the overall pattern is the same. We'll look at the generic instruction, and then we'll give you the nuances for the popular series. SIM-map!

Turn off your phone and wait for it to cool down completely.

Remove the cover and protective film (if any)

Prepare the workplace: clean desk, good lighting

Charge the new battery to 30-50% (if it is not in the factory packaging)

Take a picture of the location of the screws and plumes before disassembling-->

1. Removal of the back cover

On most Xiaomi models (except for the metal-body flagships), the back cover is attached to latches and glue to remove it:

1. Heat the edges of the phone with a hair dryer (temperature not higher than 60 ° C) for 1-2 minutes - this will soften the glue.
2. Insert a plastic blade into the gap between the lid and the body (start at the corner near the charging connector).
3. Carefully drive the shoulder blade along the edge, snapping the latches. Don't put too much effort into it!

2. Untwisting screws and disconnecting plumes

When you take the lid off, you'll see the battery locked in a metal plate or film.

1. Unplug the battery plume with a plastic blade.

Installation of a new battery

Before installing, check the contacts of the new battery for no oxidation.

1. Stick bilateral tape or apply heat glue to the back of the battery.
2. Set the battery in place by combining contacts with the plume.
3. Connect the plume to the motherboard and fix it.
4. Twirl the screws and install the back cover, starting at the corners.

Turn on the phone and check the charge. If the device doesn't turn on, check the density of the battery plume.

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On Xiaomi models with NFC-An antenna in the cover (for example, Redmi Note) 11) Be careful when you heat up with a hair dryer - overheating can damage the antenna. 10-15 Do not heat one point longer. 10 seconds.

Nuances replacement for popular models Xiaomi

Xiaomi’s smartphone design varies depending on the series, and here are the key features for the most common models:

For IP-certified models (such as the Redmi Note 11 Pro+ 5G), water protection may be lost after the battery is replaced, requiring replacement of sealing pads (you can buy them in the same stores as the batteries).

How much does it cost to replace a battery in a service center?

If you're not sure about your ability, you should trust a replacement to a professional, and the cost of the service in 2026 depends on the model of the phone and the type of service center:

• 🏢 Official Xiaomi service: 1500-3500 ₽ (Includes original battery and 6-month warranty).

Timeline for repairs:

• In the official service - 1-3 working days (if the battery is available).
• In private workshops - 1-2 hours (if there is no queue).

⚠️ Attention: Some services may offer "accelerated" battery replacement without disconnecting the screen plume, which can damage the display.

What to do after replacing the battery?

Installing a new battery is only half the battle, and to make it last as long as possible, follow these guidelines:

• 📵 Storage: If the phone is not in use for a long time, store it with a charge 40-60% cool-place.

Also, after replacing, check the operation of all phone functions:

• 📶 Communication (calls, mobile Internet).
• 📷 Camera and flash.
• 🔊 Speakers and microphone.
• 🪫 Vibration and touch buttons.

If something is not working properly, you may have had a plume damaged or a connector not tightly connected during the dismantling, in which case you can contact the service.

FAQ: Frequent questions about replacing the battery with Xiaomi