How to open the battery on the smartphone Xiaomi: a detailed guide with photos and tips

Disassembling Xiaomi's battery replacement smartphone is a challenge that many users face after 2-3 years of active use: the battery loses up to 40-50% of capacity, the device discharges in a few hours, and the official service offers a replacement at the price of half a new phone. But can you do it yourself? Yes, if you approach the matter with preparation and accuracy.

In this article, we will look at all the steps of the process, from tool selection to testing a new battery. Focus on model features (for example, the Redmi Note 10 Pro is understood differently than the Mi 11 Ultra), typical beginner errors and ways to minimize risks. You will learn which Xiaomi has adhesive battery mount, and where to unscrew the screws, how to avoid damage to the plumes and what to do if the smartphone does not turn on after assembly.

⚠️ Warning: Self-disassembly will void the warranty (if it is still valid) and can cause permanent damage to the board if the battery is not handled neatly.

1.Preparation: tools and safety

Before you start, you need to assemble a minimum set of tools, without which you're at a much higher risk of damaging the body or the internal components.

• 🔧 Set of screwdrivers (cross-cross-haul) PH00 and PH0, It is better to take magnetic - screws in Xiaomi are small and easily lost.
• 🧲 Suction cup for removing the rear panel (especially relevant for models with adhesive attachment, for example, Mi 11 Lite).
• 📏 Plastic mediators or guitar mediators – they will help to gently separate the body without scratching it.
• 🔥 Hair dryer or thermoplatform (to soften the glue when removing the battery) The temperature must not exceed 60-70°C.
• 🛡️ Gloves and safety glasses - lithium-polymer batteries release caustic substances when damaged.

Also, prepare the workspace: the desk should be clean, litter-free, light-enabled, it's advisable to use an antistatic mat or at least an earthed surface — static electricity can damage the motherboard. If you're disassembling a smartphone for the first time, videotape the process, which will help you not confuse the assembly order.

⚠️ Warning: Do not use metal tools to tamper with the battery! Even a small circuit of the contacts can incapacitate the power controller.

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Before disassembly, completely discharge the smartphone (before automatic shutdown) - this minimizes the risk of fire in case of accidental damage to the battery.

2.How to determine the type of battery attachment in your model

How the battery is attached depends on the series and year of release of the smartphone. Xiaomi has three main options:

1. Screw mount - the battery is fixed by a metal plate for 2-4 screws. Found in budget models (Redmi 9A, POCO M3).
2. Adhesive fastening: The battery is glued to the body with double-sided tape, typical of flagships (Mi 10T Pro, Mi 11) and thin-body models.
3. Combined – a combination of glue and screws (for example, Redmi Note 10 Pro).

You can find out the type of attachment by disassembling on YouTube (look for a video with your model) or by the table below:

If your model isn't in the table, look at the thickness of the case: the thinner the smartphone, the higher the probability of adhesive attachment. You can also gently shake the device — if you hear a slight knock, most likely, the battery is fixed by the screws.

Disconnect the smartphone and remove SIM-map|Remove the cover and protective film|Prepare tools for the list|Wear gloves and glasses|Take a picture of the original state of the phone-->

3. Step-by-step instruction: how to open the back cover

Let's start with the most important part, which is removing the back panel, and the key is to take your time and not make too much effort, otherwise you can break the latches or damage the fingerprint scanner plume (if it's under the cover).

For models with adhesive back panel (Mi 11, Redmi K40):

1. Heat the edge of the body with a hair dryer around the perimeter for 1-2 minutes. Keep the hair dryer at a distance of 5-7 cm so as not to overheat the screen.
2. Place the suction cup on the bottom of the lid (above the USB-C connector) and pull up.
3. Insert a plastic mediator into the resulting gap and carefully lead it along the body, disconnecting the latches.

For screw-mounted models (POCO X3, Redmi 9):

⚠️ Warning: If the lid doesn't lend itself, don't try to rip it off -- you've probably missed the screw or not warmed up enough. In the Mi 10 and newer models, there may be a hidden screw under the lid under the sticker near the camera.

4. Battery recovery: safety and nuances

When you take the lid off, you'll see the battery covered with black film. Take your time to pull it out! First, unplug the power plume from the motherboard. It's usually located at the top and it's fixed with a small connector. Carefully put it in a plastic blade -- don't pull the wires!

Then act according to the type of attachment:

• 🧴 Glue fastener: Put a plastic blade on the battery from any angle and slowly pull up. If you feel resistance, warm up the area with a hairdryer. Don't bending the battery too much, it can cause the shell to rupture and leak the electrolyte.

In some models (Mi 11 Ultra, Black Shark) the battery is glued to a thermal paste, in which case it needs to be warmed up longer (up to 5 minutes), but the temperature should not exceed 80 ° C. After removal, clean the case of glue residues with isopropyl alcohol.

⚠️ Warning: If the battery is swelling (the case cover is deformed), do not try to remove it yourself! Bloated batteries are extremely dangerous - contact the service center.

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Never use metal tools to tamper with the battery, even a micro-circuit can burn the power controller or the board itself.

5. Selection of a new battery: original vs analogues

When buying a new battery, you have three options:

1. The original Xiaomi battery is the most reliable, but also expensive (from 2000 to 5000 rubles depending on the model), sold in branded service centers or on AliExpress from trusted sellers (look for reviews from photo packaging).
2. Analogues from well-known brands (Anker, Baseus, Remax) are cheaper by 30-50%, but the capacity can be underestimated by 10-15%. Before buying, check whether the analogue is compatible with your model in size and connector.
3. No-name batteries are the riskiest option. They often have understated capacity and can quickly fail. If you choose this path, take only with a warranty of at least 6 months.

When buying, pay attention to:

• 📏 Size: the battery should fit perfectly into the socket. Even 1 mm difference can cause the housing to deform.
• 🔌 The connector – Xiaomi has two types: 2-pin and 3-pin. You can't confuse them!
• 🔋 Capacity – must match the original (for example, 5020 mAh for Redmi Note 10 Pro).
• 📅 Date of production: the fresher the battery, the longer it will last. Optimally, no older than 6 months.

After installing the new battery, it must be calibrated:

1. Charge your smartphone to 100% and leave it on charge for another 1 hour.
2. Disconnect from the network and discharge until automatically disconnected.
3. Repeat the cycle 2-3 times, which will help the power controller to accurately determine the capacity.

6. Build a smartphone and test

Installing a new battery is only half the battle, but it is equally important to build your smartphone properly to avoid sensor problems or wireless charging (if any).

• 🔄 Check the plumes, make sure all the plugs are tightly connected before closing the lid, especially the fingerprint scanner plume and the camera.
• 🧲 So, close the lid -- if the latches are damaged, use a thin double-sided tape around the edges. Don't overdo it, otherwise it'll be difficult to remove the lid next time.
• 🔧 Tighten the screws cross-cross to avoid distortion of the body. the force of the tightening should be moderate - do not squeeze!

After assembly, turn on the smartphone and check:

1. Charging (wired and wireless if supported).
2. The work of sensors (gyroscope, accelerometer, fingerprint scanner).
3. Communication quality (sometimes after disassembly, the network disappears due to poor contact of antenna plumes).

If the smartphone does not turn on:

1. Check if the battery plume is connected to the motherboard.
2. Make sure the battery is properly installed (no skews).
3. Connect the charger for 30 minutes – sometimes the power controller takes time to initialize a new battery.

⚠️ Warning: If after replacing the battery, the smartphone overheats or discharges quickly, chances are you have installed a faulty battery.Switch it off immediately and remove the battery - this can be dangerous!

7. Frequent mistakes and how to avoid them

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

Another common problem is that the smartphone doesn't see the new battery, and it can be because of:

• Poor contact in the power connector (check if the pins are bent).
• Incompatible controller (in cheap analogues sometimes there is the wrong chip).
• Firmware failure (helps reset to factory settings via Fastboot).

If the battery runs out in a few hours after replacing, check the power consumption in standby mode. Go to Settings → Battery → Battery → Battery Use. Normal sleep consumption is no more than 1-2% per hour. If the figure is higher, there may be a parasitic consumption somewhere (for example, due to a faulty communication module).

8. Alternative methods: when disassembly is not necessary

Replacing the battery doesn’t always require a complete disassembly of the smartphone, and in some cases, you can do with less radical methods:

• 🔄 Calibrate the battery through the engineering menu (works if the capacity just "lost"). To do this, type the code ##4636## and select Battery information.
• ⚡ Restore capacity with special charging cycles, such as a method"3 "Full charge" sometimes helps to get back to the 10-15% lost capacity.
• 🔧 Replacement through a service center -- if you're not confident in your abilities, you should trust the professionals to do it. 1000-2000 ruble.

External batteries (power banks) are also a temporary solution, and current models (Xiaomi Power Bank 3) support fast charging and can extend battery life by 2-3 cycles.

If your smartphone is older than 4 years, consider buying a new one. Replacing the battery in older models (Redmi 4X, Mi 5) often costs 30-50% of the cost of the device in the secondary market, in which case it is more cost-effective to upgrade the gadget.

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If the battery is getting worse than before, it's probably not the battery that's the problem, but the motherboard's power controller, and only a service center diagnostics will help.

FAQ: Answers to Frequent Questions