Xiaomi phone is flying: what to do, the reasons and replacement of the battery

The situation when the phone Xiaomi is swollen, is critical and requires immediate attention of the owner. Ignoring this feature can lead not only to a complete failure of the device, but also to create a real threat of fire or chemical burn. Lithium polymer battery installed in most modern smartphones, in violation of operating conditions or production failure begins to emit gas that bursts the sealed shell of the battery from the inside.

The first alarm is often a change in the geometry of the case, the screen can rise, the back cover can stop fitting tightly, and the machine itself, having lost its stability, begins to rotate on the table like a yule, at which point the internal pressure has already reached a dangerous level, and further use of the gadget in normal mode becomes impossible and dangerous.

Don’t panic, but act decisively and quickly. In this article, we’ll break down the algorithm for detecting bloating, explain why it happened, and provide detailed instructions on how to replace the battery to bring your Xiaomi Redmi or Poco back to life without risk to health.

Primary diagnostics and safety measures

If you notice that the case of the smartphone has deformed, the first thing you need to do is stop the electric current. It is strictly forbidden to leave the bloated battery on charging, since the electrolysis process inside the can will accelerate, increasing the temperature and the risk of depressurization.

Carefully inspect the device in good lighting. Often bloating is accompanied by the appearance of gaps between the frame and the display or between the back cover and the body. If the deformation is severe, do not try to force the screen or cover back - this can damage the motherboard or pierc the battery shell.

⚠️ Warning: If you smell a sweet chemical smell or see fluid discharge from the case, immediately stop contact with the device.Put the phone in a non-combustible container (metal bucket, ceramic dishes) and remove away from flammable items.

After the initial assessment of the condition, it is necessary to determine whether it is possible to safely remove the battery yourself or better contact the service. In modern Xiaomi models with glass rear covers, access to the battery is difficult, which increases the risk of damage to components if unskilled opening.

The main causes of battery bloating

Understanding the causes helps prevent these kinds of situations in the future, because bloating is the physical reaction of the chemical components of a battery to external or internal factors, and most often, the fault is the violation of the temperature regime of operation.

Using unoriginal or damaged chargers causes voltage surges; the power controller may not be able to control the current, causing overheating and degradation of the electrolyte; and natural wear plays a role: after 500-800 charge-discharge cycles, the Li-Pol resource of the element comes to an end.

• 🔥 Overheating: Long exposure to the sun, using heavy games while charging, or working in a cover with poor heat transfer.
• ⚡ Controller problems: A charge control circuit failure that causes the battery to continue charging after reaching 100% (recharge).
• 📉 Mechanical impact: Falls or impacts could damage the internal structure of the anode and cathode, causing a short circuit inside the jar.
• 🏭 Refused battery: Use of substandard materials in production, which is often found in cheap analogues of the original battery.

Sometimes, improper calibration of the controller or bugs in the MIUI firmware can lead to incorrect display of charge and illiterate control of charge currents, which in the long run harms the chemistry of the battery.

Can I use a phone with a bloated battery?

The short answer is no. Continuing to use the device with the bloated battery is a game of Russian roulette. The pressure inside the case increases with each charging cycle, and the shell can burst at any time.

If you ignore the recommendation and continue to use the gadget, you risk a thermal burn to your hands or face, and when the electrolyte is depressurized, it reacts with oxygen, which is often accompanied by ignition, and even if there is no fire, the electrolyte vapors are toxic.

And the inflatable battery is physically pressing on the display. The AMOLED or IPS matrix used in Xiaomi is very fragile. The pressure from the inside creates black spots (ink) that quickly spread out, and then the screen goes out of order. The replacement of the display costs significantly more than the new battery.

⚠️ Warning: Do not try to puncture a swelling battery with a needle or knife to blow it away, resulting in instant lithium fire and a severe fire that is extremely difficult to extinguish.

Preparation for replacement: tools and conditions

If you have made the decision to replace the battery yourself, you need to carefully prepare.Modern Xiaomi smartphones are assembled very tightly, often with glue, which requires accuracy and a specific tool.

The workplace should be well lit and free of metal objects that may accidentally close contacts. be sure to use an antistatic bracelet or periodically touch a grounded object to remove static electricity from the body.

It's important to get a quality battery in advance. The market is full of fakes that can swell again in a couple of months. Look for the labeling of the original manufacturer or proven brands like Nohon if you can't find the original. Pay attention to the date of production - batteries older than 2-3 years already need molding or they may have reduced capacity.

Step-by-step instructions for replacing the battery

The replacement process depends on the design of the particular model. With removable back cover devices, it's easier to remove the lid, unscrew the screws, turn off the plume and change the battery. However, most modern Xiaomi models require a full opening through the screen.

The first step is always to heat the perimeter of the device, the glue holding the display or the back cover, softens at a temperature of about 80-90 degrees Celsius, you need to heat evenly, not holding the hair dryer for a long time at one point, so as not to damage the matrix or plastic frame.

Once the lid or screen is removed, the protective plate covering the battery connectors must be unscrewed, and the battery plume must be turned off first before any other plumes are removed, and this will de-energize the board and protect the components from short circuit.

An old battery is often framed with double-sided tape, and to extract it, carefully poke the edges with a plastic blade while dripping isopropyl alcohol under the battery. Do not use metal tools to tamper with the battery itself, the risk of puncture is too great.

After installing the new battery, check the connection. The phone should turn on. Before the final gluing, make sure that all functions (camera, sound, touchscreen) are working correctly. Only after successful testing, apply a new layer of glue and fix the case.

💡

Before applying new glue, carefully clean the frame and screen of residues of old glue and fat. Degreasing with alcohol will ensure better adhesion and tightness of the case.

Calibration and post-replacement verification

After successful battery replacement and assembly, calibration is required to ensure that the power controller correctly reads the new battery’s charge level and correctly displays the percentages on the screen.

The calibration process is simple: completely discharge the phone until it turns off automatically. Then, without turning it on, charge to 100%. After reaching full charge, hold on charging for another 1-2 hours. Then reboot.

💡

Properly calibrating the battery after replacement prolongs its life and ensures an accurate display of the charge level, preventing the phone from suddenly turning off.

In the first days of use, watch the temperature of heating. It's normal to have a light heat release when you charge fast, but the phone shouldn't burn your hands. If you notice that the device warms even when it's simple, maybe the problem isn't the battery, but the power circuit on the motherboard.

Recycling of an old battery

A blown-out battery cannot be thrown into the trash. Lithium polymer batteries are hazardous waste, and when they landfill, they can ignite under the pressure of a garbage truck or poison the soil with toxins.

Hand over old batteries to special electronics reception points or battery containers, which are often installed in large shopping centers and electronics stores, this will help to preserve the environment and comply with safety rules.