Replacement of the battery in the smartphone Xiaomi: a complete guide with photos and nuances

Xiaomi smartphones are known for their value for money, but even the most reliable models face battery wear over time. POCO X5 The Pro runs out in half a day, turns off at 20 percent charge, or overheats while charging — it's time to think about replacing the battery. The service center will charge between 1,500 and 4,000 rubles for this procedure, but with the patience and the right tools, you can save money by doing everything yourself.

This article is not a universal guide for all models, but a detailed guide to the design of Xiaomi. We’ll discuss how to pick up the original battery, what tools are needed to disassemble (including alternatives to expensive equipment), and why you can’t use cheap batteries without a controller. BMS — This can cause the device to fire, and you'll also learn how to check the new battery before installing it and avoid common errors that may cause the phone to fail to turn on after assembly.

Signs that it is time to change the battery

Take your phone apart at the first sign of a quick discharge, sometimes software failures or apps' background power consumption are the problem, and here are the exact symptoms of physical battery wear that make replacement inevitable:

• 🔋 The phone turns off at 15-30% charge and only turns on after you connect to charge (even if the indicator showed 20%), which is a sign of a strong drop in real capacity - the power controller turns off the device to avoid a deep discharge.
• ⚡ Charging is interrupted or jerked (it quickly gains interest, then "stops"). Often accompanied by a message "Charging is suspended. Battery temperature is too high / low".
• 🔥 The phone’s body is heated markedly in the battery area (especially when charging or loading) and this may indicate swelling of the cells, a dangerous condition that requires immediate replacement!
• 📉 Battery life has been reduced by 2-3 times compared to the new device (for example, Xiaomi). 11T Pro held 1.5 days, and now - 6-8 hours).

If you see at least 2-3 items on the list, the diagnosis is obvious. For final testing, you can use applications like AccuBattery (revealing real capacity) or the built-in test in the engineering menu (code ##4636##, section Battery information). If the Battery health value is below 70%, the battery must be replaced.

⚠️ Warning: If the battery is swelling (the phone's case is "unlocked," the screen is up), don't try to charge or use it! This could lead to fire or explosion. Immediately remove the battery (if possible) and dispose of it at special reception points.

Which battery to choose for Xiaomi: original vs analogues

The quality of the battery is not only the battery's autonomy, but also the safety of the device, and cheap counterfeits without a charge controller can disable the motherboard or cause a fire.

For most models Xiaomi suitable batteries from ATL (Amperex Technology Limited, or Sunwoda, are the main component suppliers for Xiaomi, for example, the original battery has an articular articulation for the Redmi Note 10 Pro. MBJ435630 (ATL) or MDY11-EH (Before buying, be sure to check the compatibility table for your model:

Where to buy? Official channels:

• 🛒 Xiaomi official website (Spare parts section) – original warranty, but limited assortment.
• 📦 AliExpress (sellers rated 98%+) — Look for stores with reviews on photos of real batteries.
• 🏬 Local service centers – sometimes sell parts in bulk.

Replacement tools: what to prepare

To disassemble a Xiaomi smartphone, you need a specialized tool, without which you risk damaging plumes, screens or body.

• 🔧 Screwdriver kit: Phillips PH00 (for most screws, Torx T3/T4 (For some models, for example, the Mi 11 Ultra) Y-type (Y00) (screw-tray SIM-map)
• 📱 Plastic blades/mediators (2-3 units) – to separate the back cover and battery!
• 🔥 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C).
• 🧲 Magnetic mat or organizer – not to lose screws (in Xiaomi they can be up to 20 pieces of different lengths!).
• 🔌 Suction (optional) – helps lift the screen or back cover.
• 🛠️ Tweezers - to work with small plumes.
• 🧴 Isopropyl alcohol (90%+) — glue-residue.
• 🔋 Double-sided tape or glue B-7000 — fixing.

If you do not want to buy a full set, you can do with a minimum set:

Phillips screwdriver PH00 (necessarily!)

Plastic spatula or guitar mediator

Hair dryer (can be household, but with temperature adjustment)

Tape or tape for fixing plumes

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Important: In Xiaomi models after 2020 (e.g. Redmi Note 11, POCO F4) Often used screws with protection against screwing (so-called "security screws"). If your model is equipped with them, you will need a special screwdriver with a notch in the center or a nap for careful sawing of the head.

⚠️ Warning: Never use a knife, screwdriver or other metal objects to separate the battery! This can puncture the battery and cause short circuit. Plastic blades cost 50-100 rubles - do not skimp on safety.

Step-by-step instructions for replacing the battery

The disassembly process varies from model to model, but the overall sequence is the same. We'll look at a universal algorithm using the Redmi Note. 10 Pro (similar to most devices) Xiaomi/POCO plug-in).

Step 1: Turn off and prepare the phone

Before the disassembly:

1. Turn off the phone and remove it. SIM-map.
2. Charge the battery to 30-50% – this minimizes the risk of fire in case of accidental circuit.
3. Remove the case and clean the case of dust (it can get inside).

Step 2: Removal of the back cover

Xiaomi's back panel is glued around the perimeter and holds on the latches.

1. Heat the edges of the phone with a hairdryer (60-80)°C) for 2-3 minutes, evenly running along the seams.
2. Insert a plastic blade into the gap between the lid and the body (start at the bottom edge where the charging connector is).
3. Smoothly drive the blade along the edge, snapping the clamps. If the lid does not respond, warm up again.

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If the lid doesn't separate, try using a suction cup to create an initial gap, glue it to the screen (not the back panel!) and pull it up while putting the spatula on.

Step 3: Shutting off the battery

This is the most critical stage, and before you touch any components, you need to disconnect the battery.

1. Find the battery plume (usually located at the top of the board,marked as BATTERY CONNECTOR).
2. Carefully put the jack on a plastic spatula.
3. Secure the plume with tape so that it does not touch the contacts.

Step 4: Remove the old battery

Xiaomi's battery is glued to the body with double-sided tape to remove it:

1. Put a plastic blade on the battery from any angle, and if it doesn't work, warm it up with a hair dryer (maximum 80).°C!).
2. Put a thin plastic card or mediator under the battery to separate it from the body.
3. If the battery is swollen, do not press on it - carefully remove it by tilting the phone.

Step 5: Installation of a new battery

Before installing the new battery:

• 🧹 Remove the remnants of old glue with isopropyl alcohol.
• 🔍 Check that the new battery has a protective tape on the contacts (if not, seal them with tape).
• 📏 Make sure the capacity and voltage of the new battery is the same as the old one (e.g. 4500 mAh, 3.85V).

Put the battery in place and glue it with double-sided tape or glue. B-7000. Connect the plume to the connector on the board.

Step 6: Build the phone

Collect the phone in reverse order:

1. Put all the plumes in their places (take pictures before disassembling!).
2. Twirl the screws, observing the sequence (first long, then short).
3. Stick the back cover. Warm it up with a hair dryer (50°C) and press it for 1-2 minutes.

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After replacing the battery, be sure to calibrate: completely discharge the phone (before turning off), then charge to 100% without interruption. Repeat the process 2-3 times to accurately display the charge level.

Frequent Mistakes and How to Avoid Them

Even the skilled craftsmen sometimes make mistakes that cause the phone to break down. TOP-5 Xiaomi battery replacement errors and how to prevent them:

• 🔌 Forgot to turn off the battery before work → Short circuit when you touch the screwdriver board. Always disconnect the battery plume first thing!
• 🔥 Overheated the battery with a hairdryer. → Bloating or fire. Maximum temperature is 80.°C, keep the hair dryer at a distance of 5-10 cm.
• 🛠️ We used metal tools. → Battery puncture or scratches on the board!
• 🔄 We got the screws mixed up in the assembly. → Damage to board or display: Sort the screws by length and mark them (e.g., "A - 3 mm, B - 5 mm").
• 📱 I didn’t check the new battery before installing it. → Call the multimeter, the voltage must be 3.7–4.2V.

Another common problem is that the phone doesn't turn on after the battery is replaced.

⚠️ Warning: If after replacing the battery, the phone heats up more than usual or discharges quickly, immediately remove the battery! These are signs of incompatibility of the charge controller or battery failure!

How to prolong the life of a new battery

Even the original battery will last longer if you follow the simple rules of operation.

• 🔋 Avoid full discharge. The optimal charge range is 20-80%. Regular discharges to 0% reduce battery life by 30-40%.
• ⚡ Do not use "fast charging" all the time (33W, 67W, 120W) They heat the battery. They charge the battery for everyday use. 18W.
• 🌡️ Watch the temperature. Don't leave your phone in the sun or near heat sources. Optimal operating temperature is 10-35.°C.
• 📵 Turn off unnecessary functions. Constantly active. GPS, Bluetooth or 5G Increase energy consumption by 15-25%.
• 🔄 Calibrate the battery every 3 months. A full discharge/charging cycle (0–100%) helps to reset controller errors.

For models that support wireless charging (e.g. Xiaomi 13 Pro, Mix 4), it is important to use certified chargers, and cheap wireless pads can overheat the battery and reduce its capacity by 10-15% in six months.

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In the settings MIUI There's a hidden battery optimization feature. Go to Settings. → Battery → Battery settings → Optimize the charging cycle and turn on the option.The phone will automatically limit the charge to 80% if you plug it in overnight.

Xiaomi models with battery replacement features

Some Xiaomi smartphones have a unique design that makes it difficult to replace the battery.

For models with waterproof housing (for example, Xiaomi 13 with certification) IP53) If you replace the battery, you'll need to replace the sealing pad, and if you don't, you'll lose your moisture protection. + "adhesive gasket").

FAQ: Answers to Frequent Questions