How to remove the battery from the phone Xiaomi: instructions for all models

Modern Xiaomi smartphones, including the Redmi line, POCO And Mi, which are equipped with non-removable batteries, which is the industry standard for reducing the thickness of the devices and increasing the protection of dust and moisture, but sometimes there are situations when you need to physically remove the battery: When you replace it with a new one, when you get moisture, when you repair a motherboard, when you blow up a lithium-ion cell, in this article, we'll learn how to do this safely without damaging your phone or risking your health.

It's important to understand that the procedure requires accuracy and basic electronics skills. Failure to comply with safety regulations can short circuit, fire or fail components of your smartphone. If you're not sure about yourself, you should contact a service center. But if you decide to act on your own, follow our recommendations.

The material is relevant for all modern Xiaomi models, including the Redmi Note. 12/13, POCO X5/F5, Mi 11/12/13 and other devices with non-removable batteries. 2018 year of release) with removable covers the process is simplified - just remove the back panel.

Preparation: security tools and measures

Before you start dismantling, prepare the workplace and the necessary tools. Work on a table with a flat surface, preferably covered with a soft cloth or rubber mat, this will prevent the slipping of parts and the loss of small screws.

You'll need:

• 🔧 Set of screwdrivers (cross-cross-haul) PH00, PH0, 1.5mm flat, five-pointed Pentalobe for some models).
• 📱 Plastic mediators or blades to disengage the body (metal tools can scratch the frame).
• 🔋 Suction (for removing the display module on models with glue fastening).
• 🧲 Magnetic mat or screw container (so as not to lose or confuse them).
• 🔥 Insulation tape or shrink tube (to isolate the contacts of the battery after removal).
• 🧤 Nitrile gloves (optional, to protect against possible chemical reactions in case of battery damage).

⚠️ Warning: If the battery is swelled or deformed, do not try to puncture or bend it! Lithium-ion batteries can ignite or explode if damaged. In this case, immediately place the phone in a non-combustible container (for example, a metal pelvis) and contact the service.

Also prepare the device programmatically:

• 📴 Turn off the phone and remove it. SIM-card and memory card (if any).
• 🔋 Charge the battery to 30-50% — This will reduce the risk of short circuits when disconnecting contacts.
• 📱 Backup your data (if the phone is still on).

Step 1: Removing the back cover

Most modern Xiaomi have a single body, where the back panel is glued to the frame. To remove it, you need heating. Use a hair dryer or a thermo-air station (temperature). 60-80°C), evenly warming the edges of the phone during 2-3 It'll soften the glue and make it easier to uncouple.

Algorithm of action:

1. Start at the bottom of the phone (there is usually less glue).
2. Insert a plastic mediator into the gap between the lid and the frame.
3. Carefully drive the mediator along the perimeter, gradually detaching the lid, and if you feel resistance, warm up the area again.
4. Do not put too much effort: on some models, plumes pass under the lid (for example, antenna or fingerprint scanner plume).

On models POCO F3/F4 Redmi Note 10/11 The cover may be attached with additional latches. If the cover does not respond, check if there are hidden screws under the plugs (for example, near the connector). USB-C).

⚠️ Warning: Do not use a knife or metal tools to lid! this can damage antenna lines or leave scratches on the body.

Step 2: Disconnecting the plumes and batteries

Once you take the lid off, you'll see the insides of the phone. The first thing you need to do is disconnect the battery to avoid short circuit. The battery in Xiaomi is usually mounted on two-way tape and connected to the motherboard via a latched connector.

Procedure:

1. Find the battery connector (usually marked with white or orange frame and signed as BATT battery).
2. Carefully put a plastic blade on the latch and unplug the plume.
3. If the connector is "stopped", do not apply force - warm it with a hair dryer (temperature). 50-60°C).
4. After disconnecting the battery, check with a multimeter that there is no voltage on the contacts (should be 0 V).

Next, disconnect the remaining plumes that may interfere with the recovery of the battery:

• 📞 The plume of the display module (usually the widest, is fastened by a latch).
• 🔊 The plume of the speaker or microphone (if it blocks access to the battery).
• 📶 Antenna cables (take the connectors off carefully) U.FL or MHF4).

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If you are planning to replace the battery, take a picture of the location of the plumes and screws before disconnecting, which will help to properly assemble the phone back and avoid unnecessary parts after repair.

Step 3: Remove the battery

Now that the battery is off the board, you can start removing it. In Xiaomi, the batteries are attached to double-sided tape or glue, and sometimes additionally fixed with a metal plate, and your task is to carefully separate the battery without damaging it or tearing the plume.

Recovery methods:

1. With a thread or a guitar string: Push a thin thread (like a flopp disc or a 0.15 mm guitar string) under the battery. Saw the glue carefully as you move the thread back and forth. Don't push hard! Start at one edge, gradually moving to the opposite.
2. With isopropyl alcohol (90%+): Apply a few drops of alcohol along the edge of the battery (it dissolves the glue). 1-2 Just a minute and gently tuck the battery in with a plastic spatula. Don't use acetone or other solvents, they can damage the board!
3. With special devices: The electronics stores sell battery suction cups or extractor levers, which simplify the process, but require caution - don't pull hard!

On some models (like the Redmi Note 11 Pro), the battery may be particularly glued, so combine the methods: use alcohol first, then filament. If the battery doesn't respond, don't put too much effort into it, you better contact the service.

⚠️ Warning: If the battery starts to smoke, hiss, or heat up when it is removed, stop the procedure immediately! Place it in a fireproof container (such as a pan of sand) and leave the room.

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Never use metal tools to tamper with the battery, which can puncture the battery shell and cause a short circuit, plastic mediators or wooden sticks are safer.

Step 4: Recycling an old battery and preparing a new one

Removed batteries cannot be thrown into the trash! Lithium-ion batteries are hazardous waste and require special disposal. Most cities have battery reception points (you can find them on Ecosystem or Mosekomonitoring sites), and many Xiaomi service centers accept old batteries for recycling.

Before installing the new battery:

• 🔍 Check it for no swelling or damage.
• 📏 Make sure the capacity and dimensions are the same as the old one (allowed to differ in size). ±5%).
• 🔌 Clean the contacts of the new battery and the connector on the board with alcohol.
• 🧲 Stick the new battery onto a double-sided scotch (use the original or analogue with the same stickiness).

If you are installing a battery from a third-party manufacturer, pay attention to the voltage (should match the old battery) and cold charging current (specified on the sticker). 12 standard voltage — 3.85 B, and charging current — 1.5-2 And.

Step 5: Build your phone and check

After installing the new battery, collect the phone in reverse order:

1. Connect the battery plume to the motherboard (make sure the latch is fixed).
2. Connect the other plumes (display, cameras, speakers).
3. Install the back cover and fix it with glue (use). B-7000 or similar electronics glue).
4. Keep all the stains on your back (and make sure you don’t have any more!).

Before final assembly, perform a test check:

• 🔋 Connect your phone to charge and make sure it’s charging (the indicator should catch fire).
• 📱 Turn on the device and check that it defines the battery (in Settings) → Battery status).
• 📞 Check the work of all modules: cameras, speakers, microphone, sensors.

If the phone is not powered on or charging, possible reasons:

• 🔌 The battery plume is not connected correctly (check the fixation of the connector).
• 🔋 New battery discharged (plug in charge for 30 minutes).
• 🛠️ The motherboard is damaged (if there were circuits during disassembly).

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After replacing the battery, perform a calibration: completely discharge the phone before turning off, then charge to 100% Repeat the procedure without interruption. 2-3 This will help the controller to correctly determine the capacity of the new battery.

Frequent Mistakes and How to Avoid Them

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

If after replacing the battery, the phone began to quickly discharge or overheat, possible reasons:

• 🔋 Low quality new battery (buy only from trusted sellers).
• 🛠️ Damage to the power controller on the motherboard (diagnosis required).
• 📱 Incorrect battery calibration (perform a full discharge/charging cycle).

FAQ: Answers to Frequent Questions