How to remove the battery from Xiaomi Redmi Note 4: disassembly without damage

The Xiaomi Redmi Note 4 is one of the brand’s most popular smartphones, but even it has battery problems over time, with bloating, fast discharge or total battery failure requiring replacement, but unlike older models with removable lids, the battery is integrated into the case, making it more difficult to process.

This article will help you understand how to safely remove the battery from the Redmi Note 4 (including the Redmi Note 4X and Redmi Note 4 Pro versions) without damaging the board or plumes. We will look at the necessary tools, step-by-step instructions, and typical errors that lead to a device failure. If you have never disassembled your smartphone, you should contact the service center, but with due care, the task is feasible and at home.

Preparation: what will be required for the disassembly

Before you start dismantling, make sure you have everything you need, and the absence of at least one tool can damage the body or internal components.

Here's the minimum set:

• 🔧 Plastic blades (or mediators) - to disconnect the body without scratches.
• 🔨 Thin screwdriver (cross, 1-1.5 mm) - for unscrewing screws.
• 🧲 Magnetic mat or container – to avoid losing small details.
• 🔥 Hair dryer or thermoair station - for softening the glue (optional, but recommended).
• 📦 New battery – if you are planning a replacement (select a 4100mAh model for the Redmi Note 4).
• 🧴 Isopropyl alcohol (90%+) — glue-cleaner.

Also, prepare your desk: it should be clean, well-lit and without static electricity. Using metal tools without insulation can cause a short circuit on the board - this is one of the main reasons for the failure of the smartphone after self-repair.

Step 1: Turning off and discharging the phone

Before disassembling, be sure to turn off the Redmi Note 4. If the battery is swollen, do not turn on the device - it is dangerous! It is also recommended to discharge the battery to 20-30% to minimize the risk of fire in case of accidental damage.

How to turn off your phone if it doesn’t respond to the power button?

1. Connect the charger.
2. Hold the Power + Volume button for 10-15 seconds.
3. If the screen doesn’t light up, try the Power + Volume combination.

⚠️ Note: If the case of Redmi Note 4 deformed due to a bloated battery, do not apply effort to the screen - this can lead to cracks in the glass.

Step 2: Removal of the back cover

The Redmi Note 4 body is glued around the perimeter, so you need to carefully separate it. Start by warming the edge with a hair dryer (60-80 ° C) for 1-2 minutes, this will soften the glue. Don't overheat! The plastic can deform.

Then proceed with the algorithm:

Warm up the upper part of the body (near the camera)

Insert a plastic spatula into the gap between the lid and the frame

Carefully drive the shoulder blade along the body, separating the clips

Do not apply force - if the lid does not lend itself, warm up again.-->

Pay special attention to the area around the volume buttons and USB-C connector, which often contains hidden clips. If the lid is cracked, do not continue disassembling: microcracks can lead to dust entering the device.

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If the lid is too glued, use a thin guitar string or fishing line to cut the glue around the perimeter. Hold the string at a 45° angle to the body so as not to scratch the frame.

Step 3: Disconnect the plumes and batteries

When you take the lid off, you'll see the battery locked in a black film, and the first thing you do is unplug the battery from the board to avoid short circuits.

1. Find the white battery connector (usually located at the bottom of the board).
2. Carefully tuck it with a plastic spatula, pulling up.
3. Make sure the contacts are not bent – if the connector is damaged, it will have to be replaced.

Next, turn off the plumes:

Display (the widest, at the top).

- Cameras and fingerprint sensor (if any).

- Power and volume buttons (thin plumes on the sides).

⚠️ Warning: If you turn off the battery, you still have contact with the board when you press the power button, and you check all the plugs again, it's dangerous to run under the power button!

Step 4: Removing the battery

The battery in the Redmi Note 4 is glued to the body with double-sided tape to remove it:

1. Put a plastic shoulder blade on the battery from any angle.
2. If the tape does not respond, drop the isopropyl alcohol under the battery - it will dissolve the glue.
3. Carefully pull the battery up, don't rot it! Lithium batteries can ignite when deformed.

If the battery is swelling, don't prick it, it can cause a chemical reaction and fire.

• 🔋 Use special devices (for example, a metal plate for uniform pressure).
• 🧤 Wear gloves and safety glasses – when the bloated battery is damaged, toxic gases are released.
• 🚮 Dispose of old battery in special reception points (do not throw it into ordinary garbage!).

Step 5: Installation of a new battery

Before installing the new battery:

1. Clean the seat from the residues of glue with alcohol.
2. Check the contacts on the board – they should be clean and not oxidized.
3. Apply a new double-sided scotch (or use B-7000 glue to fix).

Set the battery so that the connector matches the contacts on the board. Do not apply force when you connect - if the connector does not enter, check it for contamination.

After installation:

• 🔌 Connect the battery to the board.
• 📱 Turn on the phone and check the charge (the correct value should be displayed).
• 🔄 If the device does not turn on, turn off the battery and check all the plumes again.

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After replacing the battery, be sure to calibrate: completely discharge the phone, then charge to 100% without interruption.

Frequent Mistakes and How to Avoid Them

Even with careful disassembly, you can make critical mistakes.

If the phone doesn't turn on after assembly, don't panic.

• 🔌 Are all plumes connected (especially the display and batteries).
• 🔋 Are the contacts of the battery connector not bent.
• 📱 Are there any foreign objects (screws, pieces of plastic) inside).

FAQ: Answers to popular questions