Xiaomi Battery Replacement: A Complete Guide from Choice to Installation

Xiaomi smartphones are known for their value for money, but even the most reliable devices will eventually experience battery wear. If your Redmi, Poco or Mi starts to run out quickly, it will spontaneously turn off when you have a battery. 20-30% It's time to replace the battery, and in this article, we'll look at the whole process, from diagnosing a problem to finally checking a new battery.

Replacing the battery with Xiaomi is a medium-sized task that requires accuracy and the right tools, and the service center will charge between 1,500 and 3,000 rubles (depending on the model), but you can save money and do it yourself if you want, and the main thing is to take your time and follow the instructions so as not to damage the plumes or the fee.

It is important to understand that the procedure is different for different series: for example, Xiaomi. 12T It is different from the Redmi Note 10 Pro and in some models (e.g. Poco). F5) The battery is particularly glued. We'll look at the universal steps and point out the key nuances for popular devices.

Signs of a malfunctioning Xiaomi battery

Before you start replacing, make sure the battery is the problem, and here are the main symptoms that indicate wear and tear or damage to the battery:

• 🔋 Fast discharge: the smartphone sits behind 2-3 with minimal load (for example, in standby mode).
• 🔌 Unintentional shutdowns: the phone is turned off when 20-40% charge, and after switching on shows 0-5%.
• 🔥 Overheating: The body heats up strongly in the battery area even without heavy use.
• 📏 Bloating: the screen or back cover begins to "go away", gaps appear, and the body itself is deformed.
• ⚡ Slow charging: even the original adapter charges the device more 4-5 hours.

If you're watching at least 2-3 The probability of a battery failure is 90% You can use applications like AccuBattery to make a precise diagnosis, or AIDA64 (displays temperature and voltage).

⚠️ Warning: If the battery is swelling, you can't pierce it or try to flush it, it can cause a fire.

In some cases, similar symptoms cause software failures (for example, after an update) MIUI) Or damage to the power controller. To rule them out, try:

1. Reset the settings to factory (Settings → About phone → Reset settings).
2. Swipe the device through Fastboot (if you have experience).
3. Check the charger and cable (use original accessories).

The choice of battery for Xiaomi: original vs analogues

The battery quality not only affects the life of the smartphone, but also its safety, with three types of batteries for Xiaomi on the market:

For most users, the best choice is licensed analogues from the ATL Or Sunwoda (these companies supply batteries for Xiaomi), and the original batteries should only be taken if you want them:

• 📱 You have a flagship model (Xiaomi) 13/14, Mix Fold, where support for ultrafast charging is important.
• 🔋 You need a battery warranty (at official dealers it is a guarantee). 6-12 months).
• 🛡️ You are willing to pay for 100% compatibility.

When buying, pay attention to:

• 🆔 Article: Must be the same as the original (e.g, MBJ4074 For the Redmi Note 10 Pro).
• 📦 Packaging: The original has a hologram, QR-code for verification, as well as inscriptions in Chinese.
• 🔧 Connector: should be ideal for the connector on the board (no backlashes, all contacts are in place).

⚠️ Warning: AliExpress batteries are often sold without certification, and if you choose to buy from a seller with a rating above 98% and a review rate of over 1 000.

💡

Before buying, check the actual battery capacity with a tester (for example, a tester, ZKE EBC-A20). Many "5000 It's really a mAh. 3000-4000 mic.

Necessary tools for battery replacement

To replace your battery on Xiaomi, you'll need a minimal set of tools, and without them, you'll risk damaging the case, plumes, or battery itself.

• 🔧 Plastic blades (spoodgers) - for careful liding and disconnection of plumes.
• 🔨 Screwdriver kit: cross-haired (PH00, PH0), flat (1.5 mm) and three-wing (Y00) for some.
• 🔥 Hair dryer or thermo-air station - for softening the glue (temperature) 60-80°C).
• 🧲 Magnetic mat or organizer – so as not to lose screws.
• 🛠️ Suction - helps to remove the back cover.
• 🧴 Isopropyl alcohol (90%+) — glue-cleaner.
• 🔋 New bilateral scotch or glue B-7000 — battery-lock.
• 📱 Tweezers – to work with small details.

For models with waterproof housing (for example, Xiaomi 12 Pro, Redmi Note 11 Pro)+) further require sealant (LOCTITE 577 or similar) to restore protection against moisture.

Where to buy tools:

• 🛒 Smartphone repair kits on AliExpress or in local stores (cost) 300-800 ₽).
• 🔧 Individual tools in radio parts stores (for example, Wiha screwdrivers or Vessel).
• 🔥 The dryer can be replaced by a household one, but temperature adjustment is needed (no higher than 80).°C!).

Turn off your smartphone and remove it. SIM-map|Charge the device before 30-50% (safe)|Prepare a workplace with good lighting|Take photos of the internal structure before disassembly|Check the availability of all tools-->

Step-by-step instructions for replacing the battery

The battery replacement process can be divided into 5 key steps: disassembling the case, disconnecting the old battery, installing a new one, assembly and inspection. We will look at each of them with nuances for different Xiaomi models.

1. Removal of the back cover

Most Xiaomi smartphones have a glue back cover that is further fixed by latches to remove it:

1. Heat the edge of the body with a hair dryer around the perimeter (1-2 minutes in every section).
2. Insert the plastic blade into the gap between the lid and the frame (start at the bottom edge where the latches are usually located).
3. Carefully drive the blade along the body, snapping the mounts, if the lid does not respond, warm the area again.
4. For models with glass back panel (e.g. Xiaomi) 11T) Use a suction cup to evenly pull the lid upwards.

⚠️ Beware: Don't use excessive force on the Redmi Note 9/10 and similar models, the fingerprint scanner plume passes under the lid and can break!

2. disconnect the old battery

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

1. Unscrew the screws that lock the plate (usually) 4-6 chunky, cross screwdriver. PH00).
2. Carefully remove the plate and disconnect the battery connector using a plastic blade (don't pull the wires!).
3. If the battery is glued, warm it up with a hair dryer (temperature 60).°C) and slap a plastic card or a shoulder blade on the edge.
4. For models with traction strips (for example, Poco) X3) Pull the black ribbons under the battery - they will make it easier to remove.

In some devices (such as the Xiaomi Mi 11), the battery is particularly glued to the battery.

• Use isopropyl alcohol to dissolve the glue.
• Fill the battery with a thin plastic card, gradually moving from edge to center.
• Do not use metal tools - the risk of short circuit!

Installation of a new battery

Before installing the new battery:

• Clean the landing site of the remnants of old glue (use alcohol and a lilaless napkin).
• Check the connector on the board – it should be clean and free of damage.
• If a new double-sided scotch is included with the battery, stick it on the case (not on the battery!).

Next:

1. Connect the new battery connector to the board (make sure it sat down before the click).
2. Carefully put the battery in place, aligning it at the edges.
3. Put the battery on. 10-15 seconds for the scotch to grab.
4. For models with a waterproof body, apply a sealant around the perimeter of the cover.

4. Build a smartphone

Collect the device in reverse order:

1. Put the metal plate in place and twist the screws (do not pull!).
2. Connect all the plumes (display, camera, power button) – they should sit tight.
3. Lay the back cover and gently press it around the perimeter (for adhesive models warm up by a hair dryer of 50).°C).
4. Then, make sure to keep the sleeves (if any).

⚠️ Important: After assembly, check all buttons, cameras and sensors. If something doesn't work, take the phone apart and check the plumes are connected.

5. Battery inspection and calibration

After the battery is replaced:

1. Turn on your smartphone and wait for the system to fully load.
2. Check the charge indicator – it should show the real level (if not, calibrate).
3. Connect the charger and make sure the phone is charging (some models may require you to do so). 10-15 minutes to activate fast charging).

For calibration of the new battery:

1. Charge your phone to 100% and hold on charging for another 1-2 hours.
2. Turn off charging and discharge the device until it is automatically turned off.
3. Repeat the cycle 2-3 This will help the power controller to determine the level of charge more accurately.

1. Correct connection of the connector (should sit tightly, without backlashes).

2. the state of the new battery (match possible).

3. Energy saving settings in MIUI (Settings → Battery).-->

Battery replacement nuances for popular Xiaomi models

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

For Poco. F3/Redmi K40 And these aluminum framed models, be careful when you heat them -- the metal conducts heat quickly, and you can overheat the board (50-60°C) and warm at short intervals.

Xiaomi. 12/13 In the series, the battery is often glued to the body with gel glue, which is not suitable for alcohol, in which case a special solvent or slow warming with simultaneous underexposure will help.

Frequent Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when replacing a battery, and here are the most common mistakes and ways to prevent them:

• 🔧 Train damage: always turn off the battery first and plug in the last. Display plumes and cameras are brittle - don't pull them by the wires!
• 🔥 Overheating: Do not heat one area for longer than 2 minutes and do not exceed the temperature of 80°C. Use thermocouples for control.
• 📱 Incorrect lid installation: If the buttons or sensors don't work after assembly, check if the lid is skewed. It should sit flat, without gaps.
• 🔋 Use of incompatible battery: even if the connector fits, the capacity or current of the charge may not match!
• 💧 Getting alcohol on board: clean the glue only on the edges of the battery. If the alcohol hits the chips, dry the board with a hairdryer (temperature 40)°C) within 10 minutes.

Another common problem is that the phone doesn't turn on after it's replaced, and the reasons may be:

• The battery plume or display is not connected.
• Short circuit (check the board for the presence of foreign metal particles).
• Marriage of a new battery (measure voltage with a multimeter - should be 3.7-4.2V).
• Protection against non-original spare parts worked (some models require resetting via Fastboot).

⚠️ Warning: If the battery heats up more than usual after replacement, immediately turn off the phone! this may indicate a short circuit or a malfunction of the power controller.

Alternatives to self-replacement

If you’re unsure of your abilities or your smartphone model is too complex (like the Xiaomi Mix Fold), consider alternatives:

• 🛠️ Xiaomi official service: warranty for work and parts, but high cost (from 2,500) ₽).
• 🔧 Unofficial service centers: cheaper (1 000-2 000 ₽), But the risk of running into unskilled craftsmen.
• 📦 Warranty replacement: If the phone is warranty and the battery is blown up, you are required to replace it for free (even if the warranty does not apply to the battery, under the Consumer Protection Act).
• 🤝 Sharing with friends/acquaintances: If someone has experience in electronics repair, ask for help.

The cost of replacement in the service depends on the model:

• Redmi 9/Note 9: 1 200-1 800 ₽.
• Poco X3/X4: 1 500-2 200 ₽.
• Xiaomi 11/12 series: 2 500-3 500 ₽.
• Folding models (Mix Fold): from 5 000 ₽.

Before you give the phone to the service, specify:

• Whether they use original parts or analogues.
• Do you have a job guarantee (at least 3 months).
• Will they be able to keep the water (if they were).

FAQ: Answers to Frequent Questions