How to get the battery from Xiaomi Redmi: disassembly without damage

The battery in Xiaomi Redmi smartphones is one of the most vulnerable components that loses capacity or fails over time. If your device suddenly shuts down at 20% charge, the body is swollen or the battery does not hold charge for more than an hour, its replacement becomes inevitable. However, removing the battery from modern Redmi is not an easy task: the manufacturer uses glue, thin plumes and fragile mounts to complicate self-repair.

In this article, we will learn how to safely disassemble the battery from popular Xiaomi Redmi Note 10/11/12, Redmi 9/10, POCO X3/X4 and others without damaging the motherboard or display. You will learn what tools you need, how to avoid short circuits, and what to do if the battery is glued to the case so strongly that it can not be moved without the risk of breaking.

Preparing for battery recovery: safety tools and measures

Before you start dismantling the Xiaomi Redmi, make sure you have everything you need. Lack of at least one tool can cause damage to plumes, scratches on the body, or even a battery fire.

• 🔧 Plastic mediators (2-3 pc.) - for careful decorating of the body and separation of the battery.
• 🔥 Dryer or thermo-air station (power of at least 1000 W) - for softening the glue.
• ⚡ Insulation or capron tape – to isolate the contacts of the battery after extraction.
• 🛠️ Screwdriver. T3/T4 (depending on the model) - for screws attaching the back cover.
• 🧤 Gloves and safety glasses – Lithium-ion batteries can ignite if damaged.

Pay special attention to your work place. Take your phone apart on a flat, clean surface without carpeting (static electricity can damage components). If you've never done electronics repair, practice on an old smartphone or watch video disassembly of your particular Redmi model, the location of plumes and screws can be very different even for devices of the same line.

⚠️ Attention: If the Redmi battery is swelling (the body is deformed, the screen is raised), do not try to remove it yourself.The risk of battery rupture and chemical burn is extremely high!

Step-by-step: how to remove the back cover Xiaomi Redmi

The first step is accessing the insides of the device. In most Redmi models (like the Redmi Note 10 Pro or the POCO X3 NFC), the back cover is attached to the latches and glue to remove it:

1. Turn off the phone and remove it. SIM-scatter-card.
2. Heat the edge of the body with a hair dryer (~60°C) for 1-2 minutes. This will soften the glue.
3. Insert the plastic mediator into the gap between the lid and the frame (start at the bottom edge where the charging connector is located).
4. Carefully drive the mediator along the perimeter, snapping the clamps. Don't put too much effort into it, you can break the mounts!

Some models, like the Redmi 9A, may have additional plug screws attached to the cover, and you can find out where they are in the iFixit or GSMArena repair manual for your model. If the cover doesn't work, warm it up again with a hairdryer, don't try to screw it, it will cause scratches.

Turned off and discharged to 20%|Removed. SIM-memory-card|Heated edges of the body with a hairdryer|At hand plastic mediators and a sucker|I work on a clean, lighted surface.-->

Disconnection of plumes and access to the battery

When you take the lid off, you'll see the motherboard, the camera and the battery glued to the case. First rule: before you manipulate the battery, it needs to be disconnected from the board.

1. Find the battery plume – it’s usually located at the bottom of the board and marked in red or orange.
2. Carefully put the connector on a plastic picker or tweezers.
3. Check with a multimeter that there is no voltage on the contacts of the battery (should be 0 V).

If you skip this step and try to tamper with the battery without turning it off, it can short circuit or even catch fire. Also, look for other plumes (display, cameras, buttons) – their accidental damage will make the phone inoperable.

Battery Removal Methods: Which One Should You Choose?

The way you dismantle a battery depends on how much it's glued, and the table below compares the methods with the pros and cons:

For most modern Redmi, the combined method is optimal: dryer heating (up to 70-80 ° C) + neat mediator tampering. If the battery does not respond, apply a few drops of isopropyl alcohol (90% +) under the edge of the battery and wait 5-10 minutes. Do not use acetone or solvents based on oils - they will damage the plastic parts of the case.

💡

If the battery starts to bubble when it's heated, stop the procedure immediately! This is a sign of a chemical reaction inside the cells. Let the phone cool down for an hour and call the service.

Frequent Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when removing the battery from the Xiaomi Redmi, and here are the most common mistakes and their consequences:

• 🔥 Battery overheating (temperature above 100)°C) - causes warping or ignition. Use thermocouples for control.
• ⚡ Closing contacts with metal tools can burn the power controller. Always isolate screwdrivers.
• 🛠️ Display plume damage, the screen will stop working.
• 🧴 Use of inappropriate solvents – some liquids corrode the glue, but spoil the plastic of the case.

One of the most dangerous mistakes is trying to snatch the battery by force. In the Redmi Note 11 and later, the battery is often glued to an aluminum frame, and if you jerk it, you can tear off part of the body or damage the antenna modules. If the battery does not respond, pause and repeat the heating.

⚠️ Warning: After removing the old battery, do not throw it in the trash. Lithium-ion batteries must be disposed of at special reception points (in Xiaomi stores or electronics!

Installation of a new battery: nuances and calibration

If you've successfully removed an old battery, it's time to install a new one.

1. Clean the seat of glue residue with alcohol or scraper. Don't use sandpaper, it leaves conductive dust.
2. Make sure the new battery is the same capacity and model as the original battery, and POCO batteries may not be suitable for Redmi, even with a similar body.
3. Stick the battery to double-sided tape or a special glue (such as the B-7000).
4. Connect the plume to the motherboard and assemble the phone in reverse order.

After assembly, be sure to perform calibration:

1. Charge your phone to 100% and keep charging for another 1 hour.
2. Turn off the charging and discharge until it is automatically turned off.
3. Repeat the cycle 2-3 times.

This will help the power controller to correctly determine the capacity of the new battery.

💡

Using a non-original battery can cause rapid capacity loss or overheating. Check whether the battery has CE and RoHS certificates before buying.

FAQ: Answers to Frequent Questions