Replacement of the battery on Xiaomi Redmi Note 6 Pro: a complete guide with photos and nuances

Why the Redmi Note 6 Pro Battery Fails and When to Change It

Xiaomi Redmi Note 6 Pro, released in 2018, is equipped with a non-removable battery capacity of 4000 mAh. Despite the stated resource of 500-800 charging cycles, the real battery life rarely exceeds 2-3 years of active use.

🔋 Fast discharge – the phone loses 30-50% of its charge in 1-2 hours in standby mode. 🔌 Bloating of the case - the back cover begins to "step away" from the screen, and the smartphone swings on a flat surface. ⚡ Disconnection – the device shuts down at 20–30% charge, although the indicator shows a normal level. 🔥 Overheating – the battery heats up even with minimal load (for example, during a call).

If you notice any of these symptoms, you don't have to wait to replace them. A ballooning battery can damage the display module, the motherboard, or even cause a fire, and it's especially dangerous to ignore the problem if the smartphone has started to reboot or not turn on after it's completely discharged.

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

Every 1-2 years

Only when the charge stops holding.

Never changed a.

Buying a new phone

Which battery to replace: original vs analogues

The original battery for the Redmi Note 6 Pro has an MB-J10 article (or BM46 in some batches) and a capacity of 4000 mAh. However, it is almost impossible to find it on sale today - Xiaomi has long since withdrawn the model from production.

🔹 ZMI (Xiaomi subsidiary – 4200 mAh capacity, 100% compatibility, 12-month warranty.
🔹 Baseus - capacity of 4100 mAh, protection against overheating and short circuit.
🔹 Remax – budget option (3800 mAh), but with the risk of shorter service life.
🔹 OEM-brandless analogues are cheap, but often with an understated capacity (3000-3500 mAh).

When choosing, pay attention to:

Capacity – do not take batteries less than 3800 mAh, otherwise the operating time will be reduced.
Controller: Cheap batteries without protection can swell or explode.
Compatible with connector – the Redmi Note 6 Pro has a non-standard power plume (3 contacts + thermistor).
The guarantee is a minimum of 6 months, otherwise the risk of running into a marriage.

Critically, the battery must have a thermistor, without which the smartphone will not display the charge level correctly and can shut down when heated.

How to check the originality of the battery?

The original Xiaomi battery has: 1. Holographic sticker with serial number (checked through the Xiaomi website). 2. Production date (not older than 2 years). 3. Mi or Redmi logo on the case. 4. Weight ~85-90 grams (forgeries are easier by 10-20%).

Tools and preparation for battery replacement

To replace the battery on the Redmi Note 6 Pro, you will need:

Tool.	Appointment	Where to buy
Plastic mediator (2-3 units)	Cover smacking and plume disconnection	AliExpress, parts stores
Cross screwdriver (PH00)	Body screw twisting	Any hardware store
Suction (diameter 5-7 cm)	Raising the display module	Phone repair kit
Isopropyl alcohol (90%+)	Cleaning contacts of glue	Pharmacy or radio shop
Hair dryer	Softening the glue under the battery	Household appliances / AliExpress

Before the start of the work:

Turn off your smartphone and remove it. SIM-map.
Discharge the battery to 20-30% – this minimizes the risk of fire if damaged.
Remove the back cover (if it has already moved away due to the bloating of the battery, act carefully!).
Prepare a workspace – a clean table with good lighting.

Backup data |Switch off smartphone and retrieve cards |Discharge battery to 20-30% |Prepare tools and alcohol |Provide good lighting-->

⚠️ Warning: If the battery is too swelled, do not try to prick or bend it, this can cause the body to ignite or rupture.

Step-by-step: how to disassemble the Redmi Note 6 Pro and remove the old battery

Disassembly of the Redmi Note 6 Pro requires care - inside a lot of fragile plumes and small screws.

Step 1 Remove the back cover

Heat the edge of the body with a hair dryer (~60-70°C) for 2-3 minutes. This will soften the glue.

Insert a plastic mediator into the gap between the lid and the case at the charging connector.
Carefully drive the mediator around the perimeter, separating the lid. Don't push too hard - there are plumes underneath!
When the lid is lifted, put it aside.

Step 2. Turn off the plumes.

Under the lid, you'll see:

🔋 Battery (stick to the body).
📱 Trains: display, touch panel, cameras.
🔧 10 screws (different lengths – remember the location of each one!).

First, unplug the battery connector (it's under the black film) and then put it in a plastic mediator, and then unscrew all the screws and gently unplug the other plumes.

Step 3: Battery extraction

The battery is glued to the body with double-sided tape to remove it.

Pick up the battery around the corner with a plastic spatula.
Pull up slowly with the glue, and if it resists, warm up with a hair dryer (no more than 80°C!).
Do not use metal tools – the risk of puncturing the battery!

If the battery is swelling, it cannot be bent or pressed, carefully remove and immediately place in a non-combustible container (for example, a metal jar).

💡

If the glue is too strong, moisten it with isopropyl alcohol - it will dissolve the adhesive in 5-10 minutes.

Installation of a new battery and assembly of the phone

Before installing the new battery:

Check the contacts on the motherboard – they should be clean (wipe with alcohol if necessary).
Make sure the new battery fits the connector (3 pins + thermistor).
Remove the protective film from the battery adhesive base (if any).

Assembly order:

Carefully put the new battery in place, combining the connector with the socket on the board.
Press it and check it so that there are no distortions.
Connect the battery plume to the motherboard.
Secure the battery with adhesive tape (goes with a new battery) or double-sided tape.
Connect the other plumes in reverse order.
Set the back cover and twist the screws (do not pull!).

After assembly:

🔌 Connect the charger and check if charging is going on.
📱 Turn on your phone and wait for the system to load fully.
🔋 Check the charge level display - if interest jumps, it's possible bad plume contact.

⚠️ Warning: If the battery is not turned on after the battery is replaced, check: Is the battery plume connected to the motherboard, is the contacts on the battery or board damaged, is all other plumes (especially the display) correctly installed. If the problem persists, it may be that the circuit on the board is damaged, and then you need to be diagnosed in the service.

💡

After replacing the battery, perform 2-3 full charge/discharge cycles (0–100%) – this calibrates the controller and prolongs the life of the new battery.

Frequent Battery Replacement Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes that damage their phone or cause a new battery to fail quickly.

🔧 Use of inappropriate tools - metal screwdrivers or knives scratch the body and can puncture the battery. Always use plastic pickers.
🔥 Battery overheating with a hairdryer - temperature above 80°C will damage the battery or display. Keep the hair dryer at a distance of 10-15 cm.
📱 Sloppy handling of plumes - sudden movements can tear off contacts!
🔋 Installation of a battery without a thermistor – the phone will not display charge correctly, and the battery will fail faster.
🔌 Poor battery fixation – if the battery dangles, contacts will eventually go away, and the phone will spontaneously turn off.

Another common problem is that the phone doesn't turn on after assembly, and the reasons may be:

Symptoms.	Possible cause	Decision
No charging.	Power plume or connector damaged	Check the contacts, if necessary, replace the connector
The phone vibrates, but does not turn on	Disconnected plume of the display or battery	Disassemble and check all connections
Battery's running out fast.	Poor battery or uncalibrated controller	Perform 2-3 full charge cycles

If you are not sure of your abilities, it is better to contact the service. The average cost of replacing a battery in the workshop is 1500-2500 rubles (taking into account work and the original analogue).

Calibration of the new battery and extension of its service life

To make the new battery last longer, calibrate the controller:

Charge your phone to 100% and hold on charging for another 1-2 hours.
Turn off charging and use the phone until it is completely discharged (until it turns off).
Repeat the cycle 2-3 times, which will help the system to correctly determine the level of charge.

Tips for extending the life of the battery:

🔌 Avoid deep discharge (below 10%) and recharge (above 90%).
🌡️ Do not use your phone in extreme temperatures (below 0)°C or higher than 40°C).
🔋 Turn off fast charging if you don’t rush it – it speeds up battery wear.
📵 Regularly update the software in new versions MIUI Optimized energy consumption.

It is also useful to disable unnecessary background processes:

Go to Settings → Battery → Power Saving Mode and activate the Ultra Mode option for critical situations, which will limit the background activity of applications and increase the running time by 20-30%.

💡

If the phone began to warm up when charging, remove the case - it can block the heat sink.

FAQ: Answers to Frequent Questions About Battery Replacement

❓ Can you replace the battery on the Redmi Note 6 Pro without disassembling the case?

No, the Redmi Note 6 Pro has a non-removable battery glued to the body, requires a complete disassembly of the phone to replace it, and attempts to pull the battery without removing the lid will damage the plumes or display.

❓ How much does it cost to replace a battery in a service center?

Cost depends on the region and type of battery: original (ZMI/Baseus) — 1800–2500 Budgetary equivalent (Remax/OEM) — 1000–1500 The work of the master — 500–1000 In official services Xiaomi may refuse to make a replacement due to the lack of original spare parts.

❓ What to do if after replacing the battery, the phone does not hold the charge?

Possible causes and solutions: Bad plume contact — take the phone apart and check the battery connector connection. Battery marriage — if the capacity is low, return to the seller under warranty. Uncalibrated controller — perform 2-3 full charge/discharge cycles. Charging connector damaged — requires a replacement power unit. If the problem persists, check the power consumption in Settings → Battery — perhaps some application discharges the phone.

❓ Can I use the battery from the Redmi Note 5 Pro?

No, despite the similarities, the batteries of these models are incompatible: the Redmi Note 6 Pro has a connector with 3 contacts + thermistor. the Redmi Note 5 Pro uses a connector with 4 contacts. The capacity and dimensions are also different (4000 mAh vs 4000 mAh, but with a different location of the mounts). Installing an incompatible battery can lead to overheating or failure to charge.

❓ How to Recycle an Old Battery?

Bloated or damaged batteries can't be thrown into the trash! Hand them over: E-waste reception points (available in most cities); Xiaomi service centers, many of them accept old batteries for free; electronics stores (e.g., Svyaznoy, M. Video, often run recycling campaigns); before recycling, seal the battery terminals with tape to avoid short circuits.