Replacement of the battery on Xiaomi Redmi 6A: a detailed guide with photos and nuances

Xiaomi Redmi 6A

2018

Redmi 6A

Many users are afraid to disassemble a smartphone for fear of damaging it or losing warranty. But in practice, replacing a battery with a Xiaomi Redmi 6A is a very feasible task, even for a beginner, if you approach it wisely. In this article, we will examine the whole process from A to Z: from choosing a new battery to calibrating after installation, you will learn what tools you need, how to avoid typical errors and what to do if the phone behaves strangely after replacing.

⚠️ Attention: If your Redmi is 6A If you've been in water, fallen from a height, or have visible damage to the board, it may not be enough to replace the battery.

1. Signs of battery wear: when is it time to change?

How do you know if the Xiaomi Redmi 6A battery really needs to be replaced, not just discharged?

🔋 Phone's running out of power. 2-3 hours with moderate use (social networks, messengers).
📉 The percentage of charge “jumps”: for example, from 40% immediately drops to 15% after a reboot.
🔌 The device is switched off when 20-30% charge and only activated from charging.
🌡️ The battery is very hot even with a small load.
🔄 The phone is slowly charging or does not recognize the charger.

If you know at least 2-3 items from the list, the battery is probably worn out, and you can check its condition using apps like AccuBattery (available on Google Play), and note the battery health option, if it is below 70-75%, it is time to change the battery.

Also worth considering is the age of the device: Lithium polymer batteries are designed for 300-500 charging cycles, after which their capacity is markedly reduced. With intensive use (charging every day) in 2-3 years, the capacity can fall to 50-60% of the original.

📊 How often do you change the battery in your smartphone?

Every 2 years

Only when the phone stops turning on

Never changed.

Buying a new phone

2. Selection of a new battery: original vs analogues

The quality of the battery not only determines the life of the phone, but also the safety of the phone, and cheap fakes can swell, overheat, or even ignite, so you have to make the choices responsibly.

For Xiaomi Redmi 6A suitable batteries with the following characteristics:

🔋 Model: BM47 (Original article from Xiaomi).
📏 Capacity: 3000 mAh (don’t believe the sellers who offer 4,000 batteries)+ mAh is a hoax).
⚡ Voltage: 3.85 V (standard for lithium polymer batteries).
🔌 Connector: Must match the original (usually 3 pins: +, -, thermistor).

Where to buy it?

Option	Pluses	Cons	Price (2026)
The original (Xiaomi)	Quality assurance, exact dimensions, long service life	More expensive than analogues, it is difficult to find in small cities	1 200–1 800 ₽
Quality analogues (Baseus, Remax)	Cheaper than the original, good reviews, easy to buy	It may differ slightly in capacity, the risk of running into a fake	600–1 000 ₽
Budgetary analogues (no-name)	Very low price, they are delivered quickly.	High risk of bloating, short service life	300–500 ₽

We recommend choosing between the original battery and proven brands (such as Baseus or Remax).Pay attention to customer reviews - if they have a photo of the battery with a production date (not older than 1 year), this is a good sign.

⚠️ Note: If the seller offers a battery with a capacity of more than 3200 mAh for Redmi 6A, It's 100% deception. The phone can't physically fit a larger battery without compromising safety.

Preparation for replacement: tools and safety

Before you disassemble the Redmi 6A, prepare everything you need.

🔧 Plastic mediator or shoulder blade (for careful smearing of the body).
✨ Screwdriver. T4 (for screws at the bottom of the phone).
🧲 Magnetic substrate or container (so as not to lose cogs).
🔥 Hair dryer or heat glue (if the battery is glued too tightly).
🧴 Isopropyl alcohol (90%+) (clean-up).
📱 New battery (pre-check its voltage multimeter - should be ~3.7–3.8).

Take care of the workplace as well:

🪑 Work at a table with good lighting.
🧹 Remove all small items that can get inside the phone.
⚡ Turn off the phone and remove it. SIM-memory-card.

If you don’t have experience disassembling the equipment, practice on an old, unnecessary phone or watch video instructions on YouTube (for example, from the channels “Repair Guru” or “Xiaomi Repair”).

Is the phone off the grid? |

Are there spare cogs in case of loss?|

Is isopropyl alcohol available for cleaning? |

Is the device charged to 30-50% (safe)?-->

Step-by-step: how to disassemble the Redmi 6A and replace the battery

Now, to the most critical stage, follow the instructions carefully so that no plumes or boards are damaged.

Step 1 Remove the back cover

The Redmi 6A is mounted on latches and glue to remove it.

Heat the phone edge with a hair dryer (temperature ~50–60°C) for 1-2 minutes – this will soften the glue.
Insert a plastic mediator into the gap between the case and the screen (start at the bottom corner).
Carefully use the perimeter mediator to snap the latches. Don't force it -- if the lid doesn't respond, warm it up again with a hairdryer.

Step 2: Spinning the screws

After removing the cover, you will see:

🔋 Battery (stick to the body).
📱 A board with a camera and plumes.
⚙️ 8 screws (marked in the photo below - usually they are under a screwdriver) T4).

Unscrew all the screws and fold them on a magnetic substrate. Don't confuse long and short screws! - this can damage the board when assembled.

Step 3: Disconnecting the plumes and removing the battery

Now we have to:

Disconnect the battery plume (it is attached with a small connector to the board) and put a plastic blade on it.
If the battery is glued, put a mediator on it, and pull it up gently, and if the glue is too strong, you can drop some isopropyl alcohol under the battery, and it will dissolve the glue.
Make sure there are no small parts under the battery (sometimes cogs or gaskets are hidden there).

Step 4: Installation of a new battery

Before installing the new battery:

Check the contacts on the board and battery – they should be clean (wipe with alcohol if necessary).
Make sure the new battery is the same size and connector.
Stick the battery to a double-sided tape (usually included) or use heat-glue.

Connect the battery plume to the board and put it neatly in place, make sure no wires are clamped.

Step 5: Build the phone

Collect the phone in reverse order:

Set all the plumes and fees in place.
Turn the screws (long first, then short).
Press the back cover starting at the top (where the camera is).
Warm up the hair dryer edge of the body for better fixation of glue.

(1) Whether the battery plume is connected to the board.

(2) Are the wires under the battery clamped?

3) Are all screws installed correctly (some Xiaomi models do not turn on if the screws are tangled up).-->

Calibration of the battery after replacement

The new battery needs to be trained to make sure the phone displays its charge level correctly.

Completely discharge the phone before turning off.
Charge to 100% without interruption (use the original RAM).
Turn off the charging and let the phone work for 2-3 hours.
Repeat the cycle 2-3 times.

It is also recommended to reset the battery data in the settings:

Go to Settings → Battery → Three dots (menu) → Reset battery statistics.
Reboot the phone.

After calibration, the phone will more accurately show the percentage of charge, and the battery will last longer.

⚠️ Warning: If the phone starts to run out or overheat quickly after the battery is replaced, check: Is the new battery bloated (as seen by the bulge of the cover); Are the plumes clamped when assembled; Are there any "extra" applications that consume charge (check in Settings). → Battery → Use of the).

6. Frequent mistakes and how to avoid them

Even with a careful replacement, you can make mistakes that will cause your phone to malfunction.

🔧 Clutched plumes — if you accidentally pinch the plume of the display or camera during the assembly, the screen may not work or there may be "snow" in the image. Solution: disassemble the phone and check all connections.
🔋 Incorrect battery connection – if you confuse polarity (+ Solution: always check the labeling on the board.
📱 Lost screws - some screws in Redmi 6A They're responsible for grounding the antenna, and if you don't twist them, the network signal will deteriorate. Solution: use a magnetic substrate and count the screws when you disassemble them.
🔥 Overheating when soldering - if you decide to solder the battery plume (which is not recommended for beginners), you can damage the board. Solution: use a soldering station with a temperature of no more than 300°C.

If the phone doesn't turn on after the change, don't panic. 90% of the time, the problem is solved by reassembling and checking all connections.

What if the phone doesn’t turn on after replacement?

1. Check if the battery plume is connected to the board (sometimes it falls out when assembly). 2. Make sure the battery is not discharged to zero (plug the phone to charge for 10-15 minutes). 3. Try to pinch the power button for 20-30 seconds - sometimes this resets the protection. 4. If nothing helps, the board may be damaged (require diagnostics in the service).

7. Alternative options: when you should not change yourself

Despite the simplicity of the procedure, in some cases it is better to entrust the replacement of the battery to professionals:

🛠️ You have no experience in disassembling equipment and are afraid of damaging your phone.
🔧 The phone has been in the water or fallen – this may require additional repairs.
📱 You bought a used battery of unknown origin (risk of bloating).
⚡ You do not have the necessary tools (for example, screwdrivers). T4 hairdryer).

The cost of replacing the battery in the service center varies from 800 to 1,500 ₽ (If you're not sure about your own abilities, you'd better pay a little more, but be sure of the outcome.

Also note the guarantee: some services offer a job guarantee (usually 1-3 months), which will protect you from marriage.

1. Use only high-quality batteries (original or proven analogues).

2. Do not apply force during disassembly - it is better to warm up the body with a hairdryer.

3. After replacement, be sure to calibrate the battery (3 full charge-discharge cycles).-->

FAQ: Answers to Frequent Questions

Can I replace the battery with a Redmi 6A without disassembling the phone?

No, it's impossible. The battery in the Redmi 6A is soldered into the body and glued to the board, so you have to disassemble the phone to replace it, and trying to pull the battery out without disassembling will damage the plumes or the board.

How long does it take to replace the battery?

With tools and experience, 20 to 40 minutes. It can take up to 1 to 1.5 hours for beginners, especially if the glue is too strong or the screws are not unscrewed well. Take your time, you better do it carefully.

How do I check if my original battery has been sold?

The original Xiaomi battery has: Clear BM47 markings and the Xiaomi logo; smooth seams and high-quality packaging (if you buy a new one); production date (not older than 1 year); You can also check the capacity using the AccuBattery application - if it is very different from the declared one (3000 mAh), it is a fake.

What happens if you use a larger battery?

In theory, you can install a larger battery (for example, 4000 mAh), but in practice it is dangerous: These batteries are often swelled due to a mismatch of the charge controller. They may not fit in the case or damage the plumes. The phone may not display the percentage of charge correctly. It is better to stick to the original characteristics.

How to dispose of an old battery?

Lithium polymer batteries can't be thrown away in the trash! They need to be taken to the reception points: Electronics stores (Svyaznoy, M. Video, Eldorado), Xiaomi service centers, special containers for battery recycling (available in many shopping centers), before disposal, tape the contacts of the battery to avoid short circuits.