How to change the battery on Xiaomi Redmi 3: video instructions and nuances

Xiaomi Redmi 3 is one of the most popular budget smartphones of 2016, but even it eventually dies battery. If your device turns off at 30% charge, quickly discharges or swells up, it's time to think about replacing the battery. In this article, we will discuss how to change the battery on Redmi 3, select the right model and show a video with a step-by-step process.

Self-replacement is cheaper than a service center, but it requires care, and the key is not to damage the plumes and leave little details inside. We will describe each step in detail, from disassembling the case to first charging the new battery. And if you prefer visual instructions, at the end of this article you will find a selection of the best videos with a replacement battery with a Redmi 3.

Signs Xiaomi Redmi 3 battery needs replacement

How do you know if your battery has run out of life and needs to be replaced?

🔋 The smartphone is turned off when 20-30% The indicator shows the remaining energy.
⚡ The battery is discharged for 2-3 with minimal load (for example, in standby mode).
📱 The body of the phone swelled – between the screen and the back cover there was a gap.
🔥 The phone gets very hot when charging or while working.
🔌 Charging is very slow or interrupted for no reason.

If you're watching at least 2-3 The battery is probably the problem with the listing. → Battery → Battery status, if it says the tank has dropped below 70-75% From the original, it’s time to change the battery.

⚠️ Attention: Bloated battery is dangerous! It can damage the screen or even ignite. Don't delay replacement if you notice a deformation of the housing.

Also, you should rule out the software causes of rapid discharge.

Restart your phone in Safe Mode (click the power button) → long tap on "Switch off" →"Safe regime").
Check the charge consumption without running applications.
If the battery is kept in safe mode longer, the problem is in one of the installed applications.

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

Every 1-2 years

Every 3-4 years

Only when the phone is no longer holding charge

I have never changed my phone, I am buying a new phone.

What battery to choose for Xiaomi Redmi 3

The original battery for Redmi 3 is marked BM43 And it's 4,100 mAh, but there's a lot of alternatives on the market, from cheap no-names to quality replacements from proven brands:

Parameter	Original (BM43)	Quality analogue	Cheap no-name
Capacity	4100 mAh	4000-4200 mAh	3,500 mAh
Term of service	500-800 cycles	400-600 cycles	200-300 cycles
Price.	1500–2500 ₽	800–1500 ₽	300–600 ₽
Guarantee	12 months	6–12 months	No guarantee.

We recommend paying attention to batteries from the following manufacturers:

🔝 Baseus – reliable batteries with overheating protection.
🔋 Remax – Good Price/Quality Rate.
📱 Patona is a German brand specializing in batteries for Xiaomi.
🔌 ZMI (Xiaomi subsidiary – almost original quality.

When buying, be sure to check:

The presence of protective film on the contacts (original and qualitative analogues always have it).
Production date – if the battery is more than 1 year old, its capacity has already decreased.
Packaging - official suppliers it is sealed, with a hologram.

💡

Check the seller reviews before you buy. On AliExpress, look for stores with a rating of at least 98% and orders from 1000+.

Preparing for replacement: security tools and measures

To replace the battery with Xiaomi Redmi 3, you will need:

Also prepare the workplace:

🪑 Work at a table with good lighting.
🧲 Use a magnetic mat or tray to avoid losing your screws.
📱 Turn off the phone and remove it. SIM-memory-card.
🔌 Charge the new battery before 30-50% before installation (this will extend its service life).

When you disassemble Redmi 3, you will encounter the following nuances:

The body is glued very tightly - you will need heating (you can use a hair dryer at minimum power).
The plumes are fragile - do not pull them by the wires, only by the plastic connectors.
Under the battery is a flexible plume - it is easy to damage when negligent removal of the battery.

⚠️ Warning: Do not use metal tools to tamper with the battery - this can cause short circuit! Only plastic blades.

If you’ve never taken a smartphone apart, practice on an unnecessary device or watch a few Redmi 3 demo videos before you start, which will help you avoid the typical mistakes.

Step-by-step: how to change the battery on Xiaomi Redmi 3

Now, let's get to the process. Follow the instructions carefully, every step is important.

1. Removal of the back cover

Start by heating the edge of the body with a hairdryer (temperature not higher) 60°C) during 2-3 It'll soften the glue:

Place the suction cup on the bottom of the screen (near the charging connector).
Pull it up carefully - a small gap should appear.
Insert a plastic mediator into the slot and slowly lead them around the perimeter, separating the lid.

Be careful with the fingerprint scanner plume – it’s on the right and can come off!

2. Disconnection of plumes

After removing the cover, you will see:

🔋 Battery (fixed to adhesive tape).
📱 Motherboard with connected plumes.
🔌 Battery connector (protected by black film).

First, turn off the battery:

Put a black protective film on the battery connector.
With a plastic spatula, gently lift the plume up.

Then disconnect the other plumes:

📞 Display plume (top left corner).
🎤 Dynamics and microphone plume (lower right corner).
👆 The loop of the button on and volume control (upper right corner).

3. Removal of the old battery

The battery in Redmi 3 is glued to the body to remove it.

Put a plastic shoulder blade on the battery from any angle.
Slowly pull up while putting on the duct tape.
If the battery fails, heat it with a hair dryer (no more than 50).°C!).

⚠️ Warning: Don't pierce the battery or rot it too much - it can cause fire! If the battery is swelling, work with protective gloves.

Installation of a new battery

Before installing the new battery:

Clean contacts on your phone and battery with isopropyl alcohol.
Make sure there is no old glue left on the body.
Stick a new adhesive tape (comes complete with the battery) or apply heat-glue.

Then:

Carefully put the battery in place, combining the contacts.
Put her on the top. 10-15 seconds.
Connect the battery plume to the motherboard.

5. Build the phone

Collect the phone in reverse order:

Connect all the plumes (start with the display, then the speaker, buttons, and fingerprint scanner).
Make sure that no plume is twisted or clamped.
Stick back cover – you can use the original glue or double-sided scotch 3M.
So, turn all the stains (not to be worn).

After assembly, do not turn on the phone immediately - let the glue dry for 10-15 minutes.

💡

The main thing when replacing the battery is not to damage the plumes and connect the battery correctly. If the phone does not turn on after assembly, check the contact density of the battery plume.

Video instructions for replacing the battery on Xiaomi Redmi 3

For clarity, we have selected the best videos with the replacement of the battery with Redmi 3. Pay attention to the nuances that the authors show – this will help to avoid errors.

Top.-3 YouTube video:

🎥 Detailed analysis with comments (in Russian) – the author shows each step and explains the possible difficulties.
📹 Quick replacement in 10 minutes (no further words) – if you only need a visual guide.
🎬 Replacing the battery with a new test (capacity comparison) – useful if you doubt the quality of the purchased battery.

Tip: Watch the video in full screen and pause for difficult moments.

🔧 How the author works with plumes (some use tweezers, others use hands).
🔥 How to heat the body (some use a hair dryer, others - a heating plate).
📦 How to Pack a New Battery (This Will Help You Distinguish the Original from a Fake).

Important: In some videos, authors use metal tools to tamper with the battery -- DON'T repeat it! Only plastic or wood.

What to do after replacing the battery

We've had a battery change, and now we need to run it right to extend the lifespan.

First charge: Charge your phone to 100%, then discharge to 5-10% and recharge. Recycle. 2-3 once.
Calibration: Reboot your phone after fully charging, which will help the system correctly determine capacity.
Check: Install the AccuBattery app and check the actual capacity of the new battery.

Also pay attention to the following points:

🔋 If the phone discharges quickly after replacement, check whether the battery is tightly sitting and whether its plume is connected.
📱 If the smartphone doesn’t turn on – you may have forgotten to plug in the display plume or battery.
🔥 If a new battery is heated, it is normal in the first place. 2-3 charge-cycle.

After a week of use, evaluate the new battery:

📊 The time of operation in active mode should be increased by 30-50%.
🔋 The phone should not be turned off when 20-30% charge.
📱 B Settings → The battery state should be good.

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

1. Check the connection of the battery plume - it could fall out during assembly. 2. Make sure all other plumes (display, buttons) are connected correctly. 3. Try charging your phone. 10-15 Sometimes the new battery is discharged to zero. 4. If nothing helps, take your phone apart and check if you have damaged your motherboard.

Frequent battery replacement errors and how to avoid them

Even experienced craftsmen sometimes make mistakes, and here are the most common problems and ways to prevent them:

Mistake.	Effects of consequences	How to avoid
Use of metal tools	Short circuit, battery damage	Use only plastic shoulder blades
High-heating of the hull	Melting plastic, damaging screen	Heat no higher than 60.°C, keep the hair dryer at 10 cm distance
Sharp pulling of plumes	Contact break, failure of display/buttons	Finish the plumes for plastic connectors, not for wires
Incomplete disconnection of the old battery	Short circuit when working with the fee	Always turn off the battery first and plug in the last one.
Use of poor quality glue	Battery falls off, bad contact	Use the original duct tape or heat glue

If you make a mistake, don't panic, and in most cases, you can fix it.

🔧 Is the plume damaged? - Buy a new one on AliExpress (worth it) 200-500 ₽) and replace.
📱 Is the screen not working? – Check the connection of the display plume.
🔋 - You may have a fake battery. Check the capacity in AccuBattery.

If the phone doesn't turn on after all the manipulations, contact the service center, and perhaps the problem is not the battery, but the motherboard.

FAQ: Answers to Frequent Questions

Can you replace the battery with Xiaomi Redmi 3 without experience?

Yes, but it requires care, and if you've never taken your phones apart, practice on an unnecessary device, or watch a few videos before you start, the key is to take your time and follow the instructions.

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

In official Xiaomi services, the replacement will cost 1500-2500 ₽ (In informal workshops, the price may be lower - 800-1500 ₽, But the battery quality needs to be clarified.

How do I check if I bought the original battery?

The original battery for Redmi 3 has: Clear labeling BM43 And the serial number, the contact tape, the sealed packaging with the Xiaomi hologram, the production date is 6 months old, and you can also check the capacity with the AccuBattery app, which is close to 4100 mAh in the original.

What to do if the new battery is quickly discharged?

Possible causes: Battery is poor (fake). Battery is not rocked. 2-3 The phone has a power-intensive app (check Settings). → Battery. Bad battery plume contact - take the phone apart and check the connection.

Can I use a battery with a larger capacity than the original?

Theoretically, yes, but in practice, this is fraught with problems: a larger battery (for example, 5000 mAh) may not fit into the case. The charging controller is not designed for another capacity - this can lead to rapid degradation. Only a battery of 4000-4200 mAh will be guaranteed to work.