Removing the battery from the Xiaomi Redmi 9A is a challenge that owners face when replacing the battery, repairing after a fall or getting moisture. Unlike the flagship models with a modular design, the budget Redmi 9A has a non-removable battery glued to the body. This complicates the process, but does not make it impossible to perform it yourself. The main thing is to understand the sequence of actions and use the right tools.
In this article, we will take a step-by-step battery recovery manual, list the materials needed, and warn you of common errors that could damage the board or display, and learn how to check the battery before replacing it, and what to do if the battery is swelling, based on experience from service centers and testing on real devices.
Preparation for disassembly: tools and security measures
Before you start dismantling the Xiaomi Redmi 9A, prepare the workspace and tools. Do not use knives, screwdrivers or metal objects - they can damage the plumes or puncture the battery.
- 🔧 Plastic mediators or shoulder blades (to separate the body)
- 🔥 Hair dryer or thermo-air station (for softening glue)
- 🧲 Screen suction cup (facilitates removal of the front panel)
- 🔋 Special glue B-7000 or similar (for reassembly purposes)
- 🛠️ Tweezers and antistatic bracelet (protection against static electricity)
If you don't have a thermo-air station, a normal dryer is fine, but it's important to control the temperature. Overheating above 80°C can damage the screen or board, and insufficient heating will not soften the glue. Optimal mode is 60-70°C for 2-3 minutes with even distribution of heat around the edges of the housing.
⚠️ Warning: If the battery is swollen or deformed, do not heat it with a hair dryer - this can lead to fire.
Also prepare a container for screws (they are small and easily lost) and remove SIM-Work on a clean, flat surface with good lighting. If you've never taken your smartphone apart, practice on an unnecessary device or watch Redmi video demos. 9A YouTube.
Step 1: Removing the back cover
The Xiaomi Redmi 9A is clamped with latches and glue. Start by heating the edge of the device with a hairdryer, holding it at a distance of 5-7 cm. Move around the perimeter, paying special attention to the corners - there the glue usually holds stronger.
- Attach the suction cup to the bottom of the screen (near the USB-C connector).
- Pull up carefully, creating a small gap.
- Insert a plastic mediator into the slot and slowly lead it along the edge, disconnecting the latches.
Don't use excessive force - if the lid doesn't lend itself, warm up the problem area again. On the Redmi 9A, the display and battery plumes are close to the edge, so the mediator's depth should not exceed 2-3 mm.
Warm the edges with a hairdryer (60–70°C)
Use the suction cup for initial clearance
Disconnect the latches with a plastic mediator
Do not dive the instrument deeper than 3 mm-->
When you take the lid off, you'll see the battery glued to the body, and it's covered with a protective film that says, "Do not puncture," and you'll see the plume connectors and screws on the board that you need to unscrew before you disassemble them.
Step 2: Turn off the plumes and battery
Before you try to tear the battery off, be sure to disconnect it from the board.
- Unscrew the screws that fix the metal plate over the battery connector (usually 2-3 pieces).
- Carefully tuck the plate with tweezers and remove it.
- Disconnect the battery connector with a plastic blade, pulling it up.
The battery connector on the Redmi 9A is fragile – if damaged, the phone won’t turn on even after being reassembled, and also disable the display and sensor plumes (they are located under metal plates labeled LCD and Touch).
| Element | Number of screws | Type of screwdriver. | Notes |
|---|---|---|---|
| Battery charge | 2–3 | Cross (PH00) | Magnetic screws, easily lost |
| Display plume | 1 | Cross (PH00) | Plate with LCD inscription |
| Touchscreen plume | 1 | Cross (PH00) | Plate with Touch inscription |
| Antenna module | 4 | Cross (PH00) | Different lengths of screws – remember the location |
⚠️ Warning: If the phone accidentally switches on after the battery is turned off (for example, due to the closure of contacts), do not continue disassembling. completely discharge the device or remove the battery at the service center.
Step 3: Removing the battery
The battery in the Redmi 9A is glued to the body with double-sided tape, and you'll need to remove it.
- Push the edge of the battery with a plastic spatula (start with the top where there are no plumes).
- Softly cut through the glue, driving the blade under the battery. Take your time, if the glue doesn't lend itself, warm up the body with a hairdryer again.
- After the glue is removed, gently lift the battery, and if it doesn't go away, check if there are any unpitched areas left.
Don't pull the battery by the wires or the connector, it can tear the contacts off. If the battery is swelling, don't try to bend or puncture it, in which case it's better to use a special cutting tool for the batteries (sold in stores for repair equipment).
What to do if the battery is too tight?
Once the battery is removed, inspect it for bloating, corrosion or damage. If there is any glue on the phone case, remove it with alcohol or scraper. Don't use abrasive materials - they can scratch the aluminum frame.
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If you are planning to install a new battery, check its capacity before buying. The original battery for the Redmi 9A has a capacity of 5000 mAh (article MB09>). Cheap counterparts often give out 4000-4500 mAh, which reduces the time of operation.
Checking the status of the battery and board
After removing the battery, examine it for:
- 🔋 Bloating (if the battery body is curved, it cannot be used).
- 💧 Corrosion traces (green or white plaque on contacts).
- ⚡ Damage to the connector (bare wires, blackened areas).
- 🔍 Insulation integrity (breaks or punctures on protective film).
Also check the smartphone charge. Pay attention to:
- 🔥 Darkened or burned elements (sign of short circuit).
- 💦 Traces of oxidation (especially near the charging connector).
- 🔌 Integrity of tracks (microcracks may appear after falling).
If you find corrosion on the board, you can clean it with a toothbrush and isopropyl alcohol. To restore the tracks, you need a soldering station and experience with microelectronics. In difficult cases (for example, if the power controller is damaged), you should contact the service.
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If the battery is swelling but the phone is still working, don't delay replacing it. A bloated battery can damage the screen or board, and in extreme cases, ignite.
Installation of a new battery and assembly of the phone
Before installing the new battery:
- Make sure that its capacity and connector match the original.
- Clean the landing site of the remnants of old glue.
- Apply a thin layer of new adhesive (e.g., B-7000) around the perimeter of the battery compartment.
You need to carefully set the battery, press it down, and plug the plug into the board, and make sure that the plumes are not bent or clamped.
- Fix the metal plates on the display and battery plumes.
- Install the back cover starting at the top (where the camera is located).
- Twisting all screws by keeping track of their length (long screws in short holes can damage the board).
After assembly, turn on the phone and check:
- 🔋 Charging (plug the charger and make sure the current is going on).
- 📱 Sensor and display (no broken pixels or dead zones").
- 📶 Network Signal and Wi-Fi (Antenna Trains Must Be Connected Correctly).
⚠️ Attention: If the phone doesn't turn on after assembly, check: Connecting the battery connector (frequent error - unpressed connector). Integrity of display plumes (can come off when sloppy assembly). Correct installation of screws (one extra screw under the board can cause a circuit).
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when disassembling Xiaomi Redmi 9A. Here are the most common of them and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Use of metal tools | Battery puncture, plume damage | Work only with plastic or wooden blades |
| Hydrogen overheating | Display detachment, board damage | Control temperature (max. 70°C) and heating time |
| Strong pulling force when removing the battery | Wire break or contact damage | Use a cutting tool for batteries |
| Incorrect screw installation | Short circuit, board damage | Remember the location of the screws or take pictures |
| Ignoring the new battery test | Fast discharge, overheating. | Buying batteries from trusted suppliers |
Another common problem is that you don't completely shut down the battery before you take it out, and if you forget to disconnect the connector, you can close the board, which will cause the phone to fail, and always double-check that the battery is off before you pull it out of the case.
If you are in doubt, it is better to contact the service center. The cost of replacing the battery in the Xiaomi Redmi 9A is about 1500-2500 rubles (depending on the region and the originality of the part), This is cheaper than repairing the board after a failed disassembly.