How to replace the battery on Xiaomi Redmi Note 7 Pro: a detailed guide with photos and nuances

Xiaomi Redmi Note 7 Pro

4000 mAh

1500-2500 ₽

30-40 minutes.

In this article, we will provide a step-by-step photo guide, the choice of the original battery, the list of necessary tools and key nuances that are not covered in the short guides, and we will also discuss how to check the new battery and calibrate the charge controller to avoid problems with the percentage of charge after replacement.

⚠️ Warning: Disassembling your smartphone will void the warranty (if it's still valid) and could damage your display or motherboard. If you've never repaired your electronics, you better contact the service.

1.How to know that the battery is time to change: 5 clear signs

Don't rush to disassemble the phone at the first suspicion. First, check if the battery is really the problem:

🔋 Fast discharge: the phone goes down in 3-4 hours with moderate use (social networks, instant messengers). Normally for the Redmi Note 7 Pro — 1.5-2 day of operation.
⚡ Jumping percentage of charge: for example, from 40% immediately drops to 15% or turns off at 20-30%. This is a sign of wear and tear on the battery controller.
📱 Bloating: If the back cover or screen starts to "go away" and the smartphone wobbles on a flat surface, the battery swells. It's dangerous: the risk of fire!
🔌 Poor charge set: The phone only charges when it is turned off or gains 1% in 10-15 minutes.
🌡️ Overheating: The battery warms even when you just scrolle through the tape on social networks.

For accurate diagnostics, use apps like AccuBattery (revealing real capacity) or type ##4636## in your phone dialer, then select Battery Information. If your Health Level is below 70%, you need to change the battery.

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

Every 2 years

When the phone stops holding the charge

Only if you're swelling.

Never changed.

Other

2. Which battery to choose for Redmi Note 7 Pro: original vs analogues

The original battery for the Redmi Note 7 Pro is BM4D (manufacturer – ATL or Sunwoda) and a capacity of 4000 mAh. But the market is full of fakes, so when buying, pay attention to:

Criteria	Original battery	Quality analogue	Fake (risk)
Marking	BM4D, QR- Code leads to Xiaomi website	BM4D, but may be a different batch (e.g. BM4E)	No labeling or inscription "For Xiaomi"
Capacity	4000 mAh (indicated on the sticker)	3800-4000 mAh (may be slightly lower)	4500+mAh (deception)
Contacts	4 units (2 power + thermistor + BMS)	4 pcs, but they can be thinner	3 contacts or oxidized
Price.	1200–1800 ₽	800–1200 ₽	400–600 ₽

Where to buy:

🛒 Official stores: Mi Store, Xiaomi Shop (original warranty, but higher price).
🌍 AliExpress: Look for sellers with a rating of 98%+ and reviews with photos. Best brands-analogues: Patona, Baseus.
🏬 Local service centers: They often sell batteries in bulk at a price below the market.

⚠️ Warning: If you see a battery with a capacity of 5,000 mAh or higher, that's a hoax. The maximum for the Redmi Note 7 Pro is 4,000 mAh. The high capacity means either a fake or a battery from another model (like the Redmi Note 8 Pro) that doesn't fit.

💡

Before you buy, ask the seller to send a photo of the battery from both sides. The original must be QR- code, which can be checked through the Mi Verify app (available only for service centers).

3. Replacement tools: what will be needed

You don't need professional tools to disassemble the Redmi Note 7 Pro, but you can't do without them.

🔧 Plastic blades (mediators): 2-3 pieces for putting the lid and battery on. You can't use metal blades, you scratch the body.
🔨 Cross screwdriver (PH00 or PH0): for the back screws. Better get a magnetic one.
🧲 Suction cup: helps remove the lid after heating (a glass suction cup may be used).
🔥 Dryer or thermoair station: for softening the adhesive (temperature 60–80°C). Replaces the iOpener (special heater).
🧴 Isopropyl alcohol (90%+): to remove glue residues from the battery and housing.
📦 Helical container: to avoid losing small parts (magnetic mat is fine).

In addition, the following may be useful:

🧤 Gloves: Li-Pol batteries contain caustic electrolytes.
📏 Plastic tweezers: for the careful detachment of the plumes.
🔋 Power Bank: To keep the phone charged during replacement (if the battery is completely dead).

The cost of the toolkit is 500-1000 ₽. If you plan to repair the equipment further, take a set for smartphones (available on AliExpress or in electronics stores).

Buy a new battery (check the labeling)|Charge your phone to 30-50% (if there is no bloating)|Prepare the workplace (clean table, good lighting)|Download the Disassembly Guide (in case of difficulties)|Turn off the phone and take it out. SIM-map-->

Step-by-step: how to disassemble the Redmi Note 7 Pro and replace the battery

The replacement process consists of 5 steps. Don't miss the steps - this can damage the plumes or the display.

Step 1: Turn off and prepare the phone

Turn off your smartphone completely. If the battery is swelling, don't turn it on, you're at risk of short circuit. Get the SIM- card tray (use a paper clip or tool from the kit).

Step 2: Removal of the back cover

The back cover of the Redmi Note 7 Pro is glued around the perimeter to remove it.

Heat the edge of the body with a hair dryer (10-15 seconds on each side) at a temperature of 60-70 ° C. Do not overheat - the plastic can deform.
Place the suction cup at the bottom of the phone (above the USB-C connector) and pull up.
Insert a plastic blade into the resulting gap and carefully lead along the body, separating the glue. If the lid does not lend itself, warm up again.

⚠️ Warning: Don't pull the lid too tightly, there are plumes of the fingerprint scanner and antenna underneath, and if you hear a crack, stop disassembling and check the integrity of the parts.

Step 3: Battery disconnection

After removing the cover, you will see:

🔋 Battery (takes up most of the space).
📶 Camera plumes and fingerprint scanner (top).
🔌 Battery connector (right, under black film)

First, disconnect the battery connector with a plastic spatula. Then gently tuck the battery on either side and pull it up. If it doesn't come out, heat it with a hair dryer (the glue under the battery also needs to be softened).

What to do if the battery is too tight?

If the battery is still in place even after heating, use strings or guitar strings, stick them under the battery and saw them back and forth, as in the video below, a method that is safer than scapulating, but requires patience.

Step 4: Installation of a new battery

Before installing the new battery:

Remove the remains of the glue from the body with isopropyl alcohol.
Check the contacts on the motherboard – they should be clean (wipe with alcohol if necessary).
Take the protective film off the new battery (if any) and glue it to the old one. Don't press it too hard, you can damage the cells.
Connect the battery connector to the motherboard.

Step 5: Assembly of the phone

Make sure all the plumes are connected, then:

Put the back cover in place and slightly press the edges.
Turn the screws (do not pull!).
Turn on the phone and check the charge (should show 0-1%).

If the phone does not turn on after assembly:

🔌 Check the battery connector connection.
📱 Make sure the display plume is not gone.
🔋 Try charging your phone for 10-15 minutes — sometimes a new battery needs an initial charge.

💡

The most common mistake when replacing is to damage the fingerprint scanner plume, so if the print is not read after assembly, check if the connector at the top of the motherboard has moved away.

5. Calibration of the new battery: why it matters

After the battery is replaced, the charge controller may misrepresent the percentage of charge (e.g., show 100% after 10 minutes of charging).

Full discharge: Use your phone before automatically turning off.
Charge to 100%: plug in the original RAM and charge until the indicator shows 100%.
Extra 2 hours: Leave your phone charging even after 100% – this will stabilize the voltage.
Recycle: Discharge the phone to 0% and charge it to 100% again.

After calibration, the percentage of charge will be displayed more accurately. If the problem persists, reset the controller settings through the engineering menu:

Enter the code ##4636##.
Select Battery Information.
Click Reset Battery Statistics (if there is such a item).

⚠️ Warning: If after calibration, the phone turns off at 20 to 30 percent charge, you probably installed a fake battery with an undercapacity, in which case, go back to the battery selection point.

6. Frequent mistakes and how to avoid them

Even with a careful replacement, you can make mistakes that will lead to new problems.

Mistake.	Effects of consequences	How to avoid
Use of metal tools	Scratches on the body, damage to plumes	Use only plastic shoulder blades
Hydrogen overheating	Deformation of plastic, detachment of the display sensor	Keep the hair dryer at a distance of 5-10 cm, the temperature is not higher than 80 ° C.
Strong pressure on the battery during installation	Cell damage, bloating	Press the battery evenly, without effort.
Incomplete disconnection of the battery connector	Short circuit during manipulation	Check that the connector has gone completely (should "click")
Use of non-original RMS after replacement	Rapid degradation of the new battery	Charge with original RAM (5V/2A or 9V/2A)

If after the replacement the phone began to warm up stronger than usual, check:

🔌 Battery adhesion density: If it wobbles, the connector could have moved away.
📱 Thermopaste integrity: In some models, it is applied between the battery and the housing to remove heat.
🔋 Charging mode: Quick Charge can heat a new battery. Turn it off in settings.

7 How long will the new battery last and how to extend its life

The battery life of the Redmi Note 7 Pro depends on several factors:

🔄 Charging cycles: The original battery is designed to last 500 to 800 full cycles (0 to 100%) and then drops to 70 to 80 percent.
🌡️ Temperature: Optimal range is 10–35°C. Charging in the cold or heat reduces the service life.
⚡ Charger type: Cheap unprotected RAM overloads the controller.
📵 Depth of discharge: Constant discharges up to 0% kill the battery faster than recharging at 20-80%.

To extend the life of a new battery:

Avoid full discharge (connect charging at 15-20%).
Do not leave your phone on charge all night (especially if you use fast RAM).
Use original cables – cheap cables often do not meet the stated parameters.
Turn off the background activity of applications (in the battery settings).
Once every 3 months, perform a full discharge-charge cycle for calibration.

If these rules are followed, the new battery will last 2-3 years without noticeable degradation.

FAQ: Answers to Frequent Questions

Can I replace the battery with Redmi Note 7 Pro without a hairdryer?

Theoretically, yes, but it's complicated. The glue on the lid and battery is very strong, and without heating, the risk of breaking latches or plumes increases. Alternatives: Use hot water in the bag (put your phone in a sealed bag of warm water for 5-10 minutes); Buy a special glue for smartphones (for example, the B-7000), which dissolves the factory glue. But the hair dryer or thermoair station remains the most reliable way.

What if the phone doesn’t see a new battery after the replacement?

Possible causes and solutions: Bad contact: check if the battery connector on the motherboard is tight. Non-original battery: some analogues require a "wake-up" - connect the phone to the RAM for 10-15 minutes, even if it does not respond. Controller failure: reset through the engineering menu (code # #4636##).

How do I check if my original battery is sold?

The original Xiaomi battery has: Clear marking BM4D and QR- code (can be checked through Mi Verify at the service center). Smooth, non-oxidized contacts with clear labels (B+, B-, TH, ID) Factory packages with a hologram (if you buy in a box). Counterfeiting often has: Blurred markings or typos (e.g., BM40 instead of BM4D) Thin, bendable contacts, low price (less than 800 ₽).

Can I put a battery of larger capacity, for example, 5000 mAh?

No. The Redmi Note 7 Pro doesn't physically fit a larger battery. The "5000mAh" batteries for the Redmi Note 7 Pro are: Cheating (actually 3500-4000mAh capacity); batteries from other models (like the Redmi Note 8 Pro) that don't fit the connector; the most you can do is take a quality analogue with a real 4,000mAh capacity (like the Patona).

Do I need to glue a new battery on double-sided scotch?

Yeah, but not regular tape, but special battery glue (like the 3M 9448A or Tesa 61396) It: Locks the battery to prevent vibrations. It doesn't conduct current (ordinary tape can cause KZ); it's easily removed the next time you replace it; if you don't glue the battery, it can move when the phone falls and rip the connector off.