Removing the battery from the Xiaomi Redmi 7A is a challenge that owners face when replacing the battery, repairing after a fall or getting moisture. Despite its apparent simplicity, the procedure requires care: wrong actions can lead to damage to the plumes, battery rupture or even short circuit. In this article, we will learn how to properly disassemble the case, disconnect the connectors and remove the battery without violating the integrity of the components.
The Redmi 7A (codenamed pine) is a low-end model, but it's not much different from the brand's flagships: it's got the same battery adhesive fixation and brittle flexible plumes. The main challenge is that there's no removable back cover, which makes it difficult to access the insides. If you've never taken your smartphone apart, we recommend that you first check out the tool list and safety rules.
What tools will be needed to disassemble
Removing the battery from the Redmi 7A is a must-have, and using improvised tools (knives, screwdrivers, the wrong size) often results in damage to the body or scratches on the board, and here is the minimum set that guarantees safe disassembly:
- 🔧 Plastic mediators (2-3 pieces) – for separation of the body without the risk of scratching metal parts.
- 🔨 The screwdriver. PH00 — for twisting the screws of the fixing of the middle cover.
- 🧲 Magnetic mat or tray – so as not to lose small screws (in Redmi) 7A 12 pieces!).
- 🔥 Dryer or thermo-air station - for softening the glue under the battery (temperature 60-80)°C).
- 🩹 Isopropyl alcohol (90%+) — for cleaning glue residues after battery removal.
- 🔋 Plastic spatula or suction cup – to jeopardise the battery without the risk of puncture.
If you're planning to replace your battery, pre-prepared a new adhesive-based battery (original article: MB01). Remember, even a slight heat increase can warp the screen or melt plastic parts. Use a dryer at minimum power and keep it 10-15 cm away from the body.
Preparing the phone for disassembly: what to do in advance
Before you start removing the battery, you need to completely turn off the device and take precautions. Even a discharged battery can retain a residual charge sufficient to short-circuit when you handle it sloppy.
Turn off the phone and remove it. SIM-memory-card
Charge the battery to 20-30% (this will make it easier to retrieve)
Back up the data (disassembly may result in resetting settings)
Work on a clean, lighted surface without carpeting (static electricity!)
Prepare a container for screws (such as a magnetic tray)-->
Pay special attention to battery discharge: a fully dead battery (<1%) can stick to the case due to dried glue, and a too charged one (>50%) increases the risk of fire if damaged. Optimal level is 20-30%. If the phone does not turn on, try charging it for 10-15 minutes to activate the power controller.
⚠️ Warning: Don't take Redmi apart 7A In high humidity conditions (e.g. in the bathroom), condensation on the board can cause corrosion of contacts even a few days after disassembly.
Xiaomi Redmi 7A: from the lid to the battery
Now, let's get to the practice. The Redmi 7A takes a number of steps, each of which requires a lot of care, and we start by removing the back cover, which is the most critical part, because it's glued around the perimeter.
Step 1 Remove the back cover
- Put the phone down on a flat surface.
- Heat the edge of the back cover with a hair dryer (30 seconds on each side) at a temperature of 60–70 ° C. This will soften the glue.
- Put a plastic mediator in the gap between the lid and the body at the headphone jack, carefully guide it along the perimeter, separating the lid.
- Lift the lid on the camera, the glue is weaker here. Don't pull too hard, there's a plume of the fingerprint scanner under the lid!
Step 2: Unscrewing the screws of the middle cover
When you take the back, you'll see 12 screws of different lengths (marked by the arrows in the photo below), and remember their location, because when you build, it's important to screw each screw into its place. Use a PH00 screwdriver and a magnetic tray to avoid confusion:
| Type of screw | Number of | Location | Length (mm) |
|---|---|---|---|
| Black (short) | 6 | Perimeter of the middle lid | 2.5 |
| Silver (long) | 4 | The charger and speaker connector. | 3.0 |
| Gold (carved) | 2 | Fixing of the antenna module | 2.8 |
Step 3: Unconnect the plumes and remove the middle cover
After removing the screws, gently apply the middle lid to a plastic blade, which is attached to the latches, so don't put too much effort. Under the lid, you'll see:
- 🔌 Battery connector (black, with orange marker).
- 📱 Display plume (wide, white).
- 🎤 Microphone plume and dynamics (thin, black).
Disconnect all connectors with a plastic spatula, starting with the battery. Pull by the tongue, not by the wires!
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If the connector doesn't detach, don't use force. First, check if there's a latch that's locked (sometimes you have to pull it up with a screwdriver).
How to safely disconnect the battery from the board
The battery in the Redmi 7A is glued to the body with double-sided tape, which eventually hardens. Under no circumstances do you try to tear the battery out by force - this can tear off the contact pads on the board or puncture the battery body, which will lead to fire.
Method 1. Heating and squashing (recommended)
- Heat the body in the battery area with a hairdryer (temperature 70-80 ° C) for 2-3 minutes.
- Put a plastic blade on the battery at the top edge (from the camera side) and if it doesn't respond, heat it up for another 1 minute.
- Put a thin plastic card or mediator under the battery to prevent the glue from sticking again.
- Slowly trace the map along the battery, separating it from the body. Take your time, the glue can stretch.
Method 2. Use of isopropyl alcohol (for hardened glue)
If the battery fails even after heating, drop a few drops of isopropyl alcohol (90%+) under the edge of the battery. The alcohol dissolves the glue but does not damage the electronic components. Wait 5-10 minutes, then try again to tamper with the battery.
⚠️ Attention: If you notice a bloating battery (the battery body is deformed), do not heat it or use alcohol. The billowing battery can explode when mechanically exposed.
What to do if the battery is damaged or damaged?
Installation of a new battery: nuances and verification
If you have removed an old battery to replace, follow these rules when installing a new one:
- 🔄 Clean the seat from glue residues with alcohol and a napkin without pile.
- 📏 Check Compatibility: Original Battery for Redmi 7A has a capacity of 4000 mAh and marking MB01.
- 🔌 Connect the battery connector to the board last, after installing the middle cover.
- 🔧 Twisting the screws cross-cross to avoid skewing the cover.
After assembly, turn on the phone and check:
- Charging (plug the charger and make sure the current is running).
- The operation of sensors (fingerprint scanner, proximity sensor).
- No overheating (if the battery is heated without loading, check the contacts).
1. Correct connection of the battery connector.
2. the presence of a short circuit on the board (look for blackened elements).
3. charge the battery (possibly discharged "to zero" and needs a "push" charger).-->
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when disassembling the Redmi 7A. Here are the most common of them and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Use of metal tools to slap the cover | Scratches on the body, damage to antenna lines | Use only plastic mediators. |
| Battery overheating with a hairdryer (>90°C) | Bloating or ignition of the battery | Control the temperature with a thermometer |
| Confused screws during assembly | Damage to board or hull | Store the screws in a magnetic tray with markup |
| Disconnection of the display plume without fixing the cover | Trail break or screen damage | Secure the cover with tape before disconnecting |
Another common problem is that you don't completely shut down the battery before work, and even if the phone is turned off, there may be a voltage on the board, so to completely shut down the device, disconnect the battery connector and wait 5 minutes before you do any further manipulation.
When to contact the service center
Despite the apparent simplicity, some situations require professional intervention.
- 🔥 Battery swelled or has visible damage (risk of fire).
- 🛠️ After disassembly, the phone does not turn on, although all connectors are connected correctly.
- 📱 The screen does not respond to touch or colored stripes appear (damaged display plume).
- 🔌 Charging is jerky or the phone discharges quickly (problem with the power controller).
The cost of replacing the battery in the service center Xiaomi is about 1500-2500 rubles (including the original battery).If you are not sure of your skills, it is better to entrust repairs to specialists – it is cheaper than recovering the fee after errors.
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Before visiting the service, make a factory reset (Settings → About Phone → Reset) This will speed up the diagnosis and eliminate software failures.