Removing the battery from the Xiaomi Redmi 8A is a challenge that owners face when replacing the battery, repairing after a fall or diagnosing malfunctions. Despite its apparent simplicity, the procedure requires care: improper actions can lead to damage to plumes, battery rupture or even short circuit. In this article, we will understand when you really need to remove the battery, what tools you will need, and guide you through each stage of disassembly, taking into account the characteristics of this particular model.
Redmi 8A
Before you start, answer yourself the question: do you really need to take off the battery? In most cases, battery problems (fast discharge, bloating, overheating) are solved by software or replacing the module in the service center.
- 🔧 You are confident in your skills and have experience with small electronics
- 💰 Want to save on the services of the workshop (replacing the battery in the service costs 1.5-3 thousand rubles)
- 🔄 Planning a comprehensive repair (for example, replacing the display) + battery)
- 📦 You already have the necessary tools and a spare battery.
When you need to remove the battery from the Redmi 8A
Not every malfunction requires physical intervention, but consider situations where battery removal is necessary and when it is possible to do without it.
Mandatory cases:
- 🔋 Battery bloating -- if the phone's body is deformed and the battery is "puffy," it needs to be replaced urgently!
- 💥 Mechanical damage after a fall or impact if the battery has received visible damage (cracks, breakdowns).
- 🔧 Replacement of the display or other internal components – without turning off the battery, the risk of short circuit when working with the board.
- 🔌 Diagnosing charging problems if the phone doesn't turn on or hold a charge, and software methods haven't helped.
When you can do without disassembly:
- 📉 Fast battery discharge (often solved by calibration or resetting settings).
- 🔄 The phone doesn't turn on, but it responds to charging (possibly firmware problem).
- 🌡️ Overheating when charging (check the cable and power supply before disassembling).
⚠️ Note: If the phone is warranty-free, self-disassembly will cancel it. In this case, contact an authorized Xiaomi service center.
Preparation: security tools and measures
Before disassembling, gather everything you need, and if you don't have at least one tool, you can damage the body or the internal components.
| Tool. | Appointment | Where to buy |
|---|---|---|
| Plastic mediator (2-3 units) | For careful putting of the cover and disconnecting of plumes | AliExpress, electronics stores |
| Cross screwdriver (PH00) | For spinning the screws of the back cover | Any hardware store |
| Suction (optional) | Helps to lift the cover after warming up | Phone repair kits |
| Fryer-dryer | To soften the glue under the lid | Household stores |
| Tweezers | To work with small details and plumes | Radio shops |
Also prepare:
- 📱 Spare battery (if you are planning to replace) will suit the original battery BM47 or a qualitative analogue (for example, from ZMI or Baseus).
- 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and removing glue residues.
- 🧻 Soft fabric or wipes – so as not to scratch the screen and body.
- 🔌 Antistatic bracelet (optional, but recommended to protect the board from static electricity).
⚠️ Warning: Never use metal tools (knives, screwdrivers) to lid the lid! This is almost guaranteed to damage the case or plumes. Plastic mediators cost pennies, but will save your phone.
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Before disassembling, completely discharge the phone (up to 0%) and turn it off, which minimizes the risk of short circuits when the battery is disconnected.
Step-by-step: how to remove the back cover
The most important step is to carefully detach the back panel. On the Redmi 8A, it is glued around the perimeter, so it will take patience and caution.
Step 1. Warming up the hull
The glue that holds the lid becomes elastic when heated. Use a hair dryer at minimum power (temperature). ~50–60°C) and warm the edges of the phone evenly for 2-3 minutes. Do not direct hot air to the screen or camera - this can damage them!
Step 2: Filting the lid
Insert a plastic mediator into the gap between the lid and the body (begin at the bottom edge where the charging connector is), carefully drive the mediator along the perimeter, gradually separating the lid, and if you feel resistance, warm up the place again.
☑️ Preparation for lid removal
Step 3: Disconnect the plumes
After removing the cover, you will see:
- 🔋 Battery (takes up most of the space).
- 📸 Camera plume and fingerprint scanner.
- 🔊 Dynamics and vibrator.
Before touches anything, unplug the battery plume from the motherboard, which is under a black protective film and is attached to a small connector, and carefully tweez it with a plastic transmitter or tweezers.
What to do if the lid does not lend itself?
Battery Removal: A Step-by-Step Process
Now that the lid is removed and the battery is off the board, you can start removing it. In the Redmi 8A, the battery is glued to the case, so you need to be careful.
Step 1: Removal of the protective film
The battery is covered with a black film with the inscriptions. Take it off carefully, you will see a white adhesive layer underneath it. Take your time to pull the film so as not to tear it (it can come in handy when you reassemble it).
Step 2. Softening the glue
Use a dryer or a thermo-air station to warm the battery on the back (through the body). The glue will become softer, and the battery will separate more easily. Don't overheat! 1-2 minutes at 50-60 °C are enough.
Step 3: Battery tampering
Put a plastic mediator under the battery from any angle, and carefully steer it along, separating the battery from the body. If you feel resistance, warm up the place again. Do not use metal tools under any circumstances! They can puncture the battery, which will lead to a fire.
Step 4: Full extraction
When the battery separates around the perimeter, gently lift it over the edge. If it's "feeling" in some places, don't jerk, you better warm up the problem areas again. After extraction, clean the case of glue residues with isopropyl alcohol.
⚠️ Warning: If the battery is swelling, don't try to puncture or bend it! This can cause caustic gases or fire. Dispose of the battery at special reception points.
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When removing the battery, never make an effort to the center of the battery, only the edges, and this minimizes the risk of damage to the battery cells.
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when working with the Redmi 8A. Here are the most common ones and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Use of metal tools | Battery puncture, short circuit, plume damage | Use only plastic mediators and rubber tip tweezers |
| Hydrogen overheating | Melting plastic, damaging screen or camera | Keep the hair dryer at a distance of 10-15 cm and do not heat above 60 ° C |
| plume-breaking | Contact break, failure of the camera or fingerprint scanner | Disconnect the plumes carefully, putting them on the side |
| Ignoring antistatic measures | Damage to the motherboard by static electricity | Work on an antistatic surface or use a bracelet |
Another mistake is the wrong disposal of an old battery: bloated or damaged batteries can not be thrown into ordinary garbage! They contain toxic substances and can spontaneously ignite. Most cities have electronic waste reception points (for example, in Svyaznoy stores or M. Video stores).
Reverse Assembly: How to Install a New Battery
If you've successfully removed an old battery, it's time to install a new one, a process that's as important as disassembly, because the proper assembly of the phone depends on how the phone works.
Step 1: Preparing a new battery
Check that the new battery is compatible with the Redmi 8A (original model - BM47, capacity 5000 mAh). Make sure the contacts are clean and not bent. If necessary, wipe them with isopropyl alcohol.
Step 2. Applying glue
If you have tape attached to the battery, use it. If you don't, you can buy two-way tape for phones (like the 3M 9448A), and apply glue to the phone body, avoiding other components.
Step 3: Installation of the battery
Carefully put the battery in place, matching the contacts with the connector on the board. Press it evenly over the surface so that the glue grasps well. Don't press too hard, it can warp the battery.
Step 4: Connecting plumes and assembly
Connect the battery plume to the motherboard, then reset the camera plume and the fingerprint scanner, make sure all connectors are tightly locked, then install the back cover, warm it up with a hairdryer for better adhesion of the adhesive.
Step 5: Checking the performance
Turn on the phone and check:
- 🔋 Battery Charging (Connect the Charger).
- 📸 The operation of the camera and fingerprint scanner.
- 🔊 The sound from the speaker.
- 🌡️ Body temperature (should not be very hot).
⚠️ Warning: After the battery is replaced, the phone may show an incorrect charge level in the first few charge/discharge cycles".
Alternative solutions: when the disassembly is not necessary
Battery problems don't always require physical extraction, and in some cases, you can do it by software or simple actions.
- 🔄 Battery calibration: Completely discharge the phone, then charge to 100% without interruption. Repeat 2-3 times. This helps with incorrect display of the charge level.
- 🧹 Cleaning up the system: Remove unnecessary apps and cache through Settings → Background processes often drain the battery.
- 🔧 Resetting: If the phone starts to discharge quickly after the update, try resetting to factory settings (Settings) → The phone. → Resetting settings).
- 🔌 Replacement of charger: Sometimes the problem isn't with the battery, but with the power supply or cable.
If after these manipulations the problem remained, and you are sure that the battery is to blame - only then proceed to disassembly.