How to understand that the battery on the Xiaomi phone is swollen: signs, causes and actions

Battery bloating is one of the most dangerous malfunctions of the smartphone, which users often ignore to the last.Smartphones Xiaomi, including the line Redmi and the rest of the smartphone. POCO, They are not immune to this problem, especially after 2-3 The danger is not only the risk of failure, but also the potential ignition or explosion of lithium-ion cells in critical damage.

Compounding the problem is that in the early stages, bloating is not noticed: the body of modern smartphones often masks deformation, and software failures are written off as “glitch” of firmware. However, there are 7 key signs that you can diagnose a problem before it becomes critical. In this article, we will discuss how to test the battery on Xiaomi without disassembling, what to do when confirming bloating and how to prevent re-breaking after replacement.

Why Xiaomi’s battery is swelling: 5 main reasons

The lithium-ion and lithium-polymer batteries used in Xiaomi smartphones are swelled by chemical reactions inside the cells. The main culprit is the gas that is released when the electrolyte decomposes. Here are key factors that accelerate this process:

• 🔋 Deep discharges: if the phone is often discharged to 0% and stays in this state for a long time, the battery degrades in 3-4 Especially critical for Redmi Note models. 8/9 and POCO X3, where the power controller does not always correctly disable the load at zero charge.
• ⚡ Overheating: Use of non-original chargers (especially higher voltages) 5V/2A), Charging games or direct sunlight raise the battery temperature to 45-50°C, which destroys its structure.
• 📱 Mechanical damage: falls, bumps, or even severe compression (such as in narrow pockets) can disrupt the integrity of battery cells.In Xiaomi Mi 11 and Redmi K40 The battery occupies almost 80% of the interior space, so even minor deformations of the body are critical.
• ⏳ Natural wear: after 500-800 Charging cycles battery capacity falls on 20-30%, The risk of bloating grows exponentially. 9A, POCO M3) Use cheaper batteries with reduced resource.
• 🔌 Poor charging: Using no-name cables or wireless charging without Qi certification results in unstable current that destroys the battery anode.For example, Xiaomi 12 Pro wireless charging power 50W It requires a strictly original adapter.

Interestingly, even storing a phone with a fully charged battery at a high temperature (such as in a car in the summer) accelerates degradation. 40-60% temperature 10-25°C.

7 signs of a bloated battery on Xiaomi (with photos)

You can diagnose bloating without disassembling your phone, and note the following symptoms:

1. Deformation of the case: if the back cover or screen began to "step away" from the frame, and there was a gap between them - this is the first sign. 8A, POCO C3) The blob is visible in the lid, and in the glass models (Mi 10, Mi 11) the blobing of the reflective surface.
2. The screen has "detached": if the display has started to "step away" from the body at the edges or there are white stripes around the perimeter, the battery presses on it from the inside. In the Redmi Note 10 Pro, this is often accompanied by a green screen due to damage to the plume.
3. The phone doesn't lie flat, so you put it on the table with the screen up, and if it's swaying like a boat or if one of the corners is raised, it's a sign of internal deformity, especially on flat-body models (POCO F3, Redmi K30).
4. Buttons or connectors do not work: a bloated battery can put pressure on the USB-C port, volume buttons or on, making them less responsive. In Xiaomi Mi 9 often "stick" power button due to battery pressure.
5. Spontaneous reboots: if the phone turns off when 30-40% charge or reboot for no reason, this may indicate a rupture of the battery contacts due to its deformation.
6. Increased body thickness: Compare your phone to a new one (or a photo from the internet). 9 normally — 8.9 In case of a battery, it can reach 10-11 mm.
7. Fast discharge and overheating: if the phone is discharged 2-3 during normal use and warms up even in standby mode, this may be due to short circuit inside the battery.

Critical sign requiring immediate action: if the phone case becomes hot to the touch (above 50)°C) and the characteristic chemical odor has appeared, which is a signal for the start of thermal acceleration of the battery, in which case the device must be immediately turned off and isolated from flammable objects.

How to test the battery on Xiaomi without disassembly: 3 reliable ways

If you notice suspicious symptoms, you can confirm or deny the bloating without opening the body.

1. Test on a flat surface ("swinging")

Put your phone on the table with the screen up. Carefully press the corners of the device one by one.

• ✅ If the phone is tight and does not stagger, the battery is normal.
• ❌ If the body is "playing" or one of the corners is raised - this is a sign of internal deformation.

For models with glass back panel (Mi 11, Mi) 10T) You can use the bubble level (attach to the screen): if the bubble shifts by more than 2 mm, the battery swells.

Checking gaps between the body and the screen

Take a thin plastic card (such as a bank card) and try to stick it between the screen and the case around the perimeter:

• 📱 Normal: card fails or enters with less than 1 mm force.
• ⚠️ Warning: The map is entering 1-2 mm - initial stage of swelling.
• ❌ Dangerous: the card enters 3 mm or more - the battery is severely deformed.

3. Diagnostics through the engineering menu

On some Xiaomi models, you can check the battery status through a hidden menu:

1. Open the phone app and enter the combination: ##4636##
2. Go to the section Information about the battery.
3. Check parameters: Charge level (should match the indicator in the status bar); Condition (if Unknown or Bad is a battery problem); Temperature (above 40°C in standby mode - alarm signal).

In the models with MIUI 12+ Some of the data can be hidden, and the alternative is to use applications like AccuBattery, which shows the actual capacity and wear of the battery).

What to do if the battery on Xiaomi is swollen: step-by-step instructions

If you've confirmed that you're bloating, you need to act quickly, but not panic.

⚠️ Warning: Do not attempt to puncture or compress a bloated battery under any circumstances - this may cause a fire or explosion. Lithium-ion batteries contain a flammable electrolyte!

1. Immediate security measures

• 🔌 Turn off the phone from charging and turn it off (press the power button for 10 seconds).
• 🧊 Place the device on a non-combustible surface (ceramic tiles, metal) away from direct sunlight.
• 🚫 Do not use your phone before replacing the battery – even when the battery is off, the bloated battery can close.

2. Battery replacement

The only solution is to replace the battery.

Self-replacement will require:

• 🔧 Setting screwdrivers (T3, T5 Xiaomi).
• 🧲 Screen suction cup.
• 🔋 New battery (recommended brands: Original Xiaomi, Patona, Baseus).
• 🔥 Hair dryer or heater plate for softening glue.

Video instructions for popular models:

• Redmi Note 9/10: link
• POCO X3/X4: link
• Mi 11/Mi 10: link

3. Recycling of an old battery

Bloated battery should not be thrown into ordinary garbage! Hand it over to the reception points of hazardous waste or to the service center Xiaomi. In Moscow and St. Petersburg, there are specialized eco-points (for example, Ecosystem or MegaFon Ecology).

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Before replacing the battery, make a backup of the data through MIUI Backup (Settings) → The phone. → Backup: A bloated battery can damage the motherboard, resulting in loss of information.

How to extend the life of a new battery on Xiaomi: 10 rules

After replacing the battery, follow these guidelines to avoid re-blowning:

1. Use the original RAM: Xiaomi chargers have built-in overheating protection. Redmi Note 11 is suitable for an adapter 33W (model MDY-12-ED).
2. Avoid extreme temperatures: Don't leave your phone in the sun or near heaters.Optimum range — 10-35°C.
3. Charge to 80%: in MIUI There is an optimised charging function (Settings) → Battery that limits charge to 80% to extend life.
4. Don't discharge until 0%: plug in the charger when 15-20%. A full discharge kills the battery for 100-200 cycle.
5. Update: In new versions MIUI energy efficiency is optimized, for example, in MIUI 14 Added Ultra Battery Saver Mode.
6. Use ventilation cases: tight silicone covers worsen heat sink. POCO F4 Xiaomi Hard Case with perforation is suitable.
7. Turn off wireless charging: If your model supports it (Mi 11 Ultra, Mi Mix 4), use it only in extreme cases - it heats the battery more than wired.
8. Calibrate the battery: once every 3 months completely discharge the phone before turning off, then charge to 100% without interruptions.
9. Avoid games when charging: Genshin Impact or PUBG on the Redmi K50 They can heat the battery to 50.°C in 20 minutes.
10. Check the battery health: in AccuBattery, watch the Health setting (below 80% is the time to think about replacing).

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Compliance with these rules increases the battery life 30-50%. For example, when properly operated, the battery in the Redmi Note 10 Pro serves 3-4 year instead of standard 2-x.

Xiaomi models with frequent battery problems: blacklist

Some Xiaomi models are more prone to battery bloating due to design features or factory defects, and the table below shows the devices that users complain about most often:

If you have one of these models, check the battery every 6 months, even if there are no visible signs of bloating. - For the Redmi Note 8 Pro and POCO X3 Revocable campaigns were issued to replace batteries - check in the service center, whether your device falls under the program.

Frequent questions about Xiaomi’s bloated batteries