Self-replacement of the battery on Xiaomi Redmi Note 5: from battery selection to assembly

Xiaomi Redmi Note 5 — one of the most popular smartphones 2018 Even with a reliable battery capacity. 4000 m.h. 3-4 It starts to discharge rapidly, swell or shut down when the charge is low. 30-40%, If you don't hold a charge or deform the back cover, it's time to change the battery. 1500 before 3000 With the tools and patience, you can do everything yourself. 30-40 minute.

This article includes step-by-step analysis of the smartphone with the photo, a list of necessary tools, recommendations for choosing an original or high-quality battery analog, as well as key nuances that are missed in most instructions. For example, why you can not use metal mediators to jack the lid or how to properly unplug an old battery without damaging the plumes. If you have never disassembled a smartphone, do not worry: the Redmi Note 5 is a device with medium repair complexity, and with accuracy, the risk of breaking something is minimal.

Before you start, answer two questions:

• 🔋 Battery condition: it swells (lid lifted), discharges quickly or the phone shuts down on the phone 20-30%?
• 🛠️ Your experience: you have ever disassembled the equipment (laptop, tablet), or it will be the first repair?

If the battery is swollen, you can not pull with replacement: it is dangerous for the display (matrix may crack) and the motherboard (risk of short circuit).

How to understand that the battery Redmi Note 5 is time to change: 5 clear signs

It's not always low autonomy that means the battery is out of order, sometimes it's background processes, damaged software, or a worn-out charging connector, and before you spend money on a new battery, check for these symptoms.

• 📉 A sharp drop in charge: the smartphone shows 40%, and after 5 minutes it turns off. This is a sign of losing real capacity - the battery controller "lies" about the level of charge.
• 🔥 Overheating during charging: if the case is heated more than before, and charging is slow, most likely, the chemical structure of the battery is broken.
• 📱 Bloating: the back cover has risen, the smartphone “plays” in the hands when you press the screen or there are gaps between the body and the display!
• ⚡ Long charging: if the battery was previously charged for 2 an hour, and now it demands 4-5 — It's a cell degradation signal.
• 🔄 Spontaneous reboots: The phone turns off in the cold or when the charge is low (for example, on the phone). 15-20%).

If at least 2-3 The items on the list match, so it's time to change the battery, and you can use applications like AccuBattery to make a final diagnosis, or AIDA64 (Note the "Save Capacity" parameter if it is lower 70-75% factory-like (4000 mAh) - battery worn out.

⚠️ Warning: If the battery is swelling, do not try to puncture or compress it - this can lead to fire! Also do not use a smartphone with a deformed battery: it presses on the display and motherboard, which can break the screen or short circuit.

Which battery to choose for Redmi Note 5: original vs analogues

Xiaomi’s original battery pack for Redmi Note 5 (model BM47) near 1500-2000 It's hard to find it on the market, most often in service centers. Online stores (e.g. AliExpress, Beru, Yandex Market) sell analogues that can be both quality and frank marriage:

If you decide to take an analog, pay attention to brands:

• 🔋 ZOP Power is one of the best battery manufacturers for Xiaomi. Capacity is close to the original, good controller.
• 🔋 Remax is a budget option, but with acceptable quality.
• 🔋 Baseus – reliable batteries with protection from overheating, but they are almost as original.

Before buying, check:

1. The presence of a hologram or seal on the package (the originals and quality analogues it is).
2. Production date – if the battery is more than 1 year old, it could lie in a warehouse and lose some of the capacity.
3. Reviews about the seller – especially pay attention to photos of real buyers.

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Before you buy, ask the seller to send a photo of the battery from both sides. The original and good ones have clear labeling, smooth seams and high-quality soldering of contacts.

3. Replacement tools: what you need and where to buy

To disassemble the Redmi Note 5 and replace the battery, you will need a minimum set of tools, most of which can be bought at electronics stores (Chip and Deep, 220 Volts) or ordered on AliExpress in smartphone repair kits.

• 🔧 Plastic mediators (2-3 They can be used to pull the lid off the plumes. Metal is not suitable. They can scratch the body or damage the contacts.
• 🔧 Cross screwdriver (PH00 or PH0) — You better get a magnetic one so the cogs don't get lost.
• 🔧 Suction cup (optional) - helps to lift the lid after warming up. You can use a suction cup from the holder for the phone.
• 🔧 A hair dryer or a thermo-air station to soften the glue under the lid, a normal hair dryer at maximum temperature will do.
• 🔧 Tweezers to carefully detach the plumes.
• 🔧 Double-sided tape or glue B7000 — to fix a new battery (sometimes included).
• 🔧 Alcohol (isopropyl or medical) – to clean contacts and remove glue residues.
• 🔧 Gloves (optional) – if you are afraid of getting hurt or getting glue on your hands.

If you don't want to buy everything separately, look for smartphone repair kits -- they cost between 300 and 800 rubles and include mediators, screwdrivers, suckers and tweezers, like the iFixit Pro Tech Toolkit or Chinese counterparts.

⚠️ Warning: Don't use knives, scissors or other sharp metal objects to lid! They can damage display plumes or buttons, and scratch the body. Plastic mediators cost pennies but save you from costly mistakes.

Buy a new battery (check compatibility with Redmi Note 5)

Prepare the workplace (clean table, good lighting)

Charge your smartphone to 30-50% (swell-out!)

Download the disassembly instructions (in case something goes wrong)

Prepare a container for screws (so that they do not get lost)-->

Step-by-step: how to disassemble the Redmi Note 5 and replace the battery

Now, to the most critical stage, which is disassembling your smartphone, turn off your phone and follow the instructions Step-by-step. If you've never really understood the technique, we recommend that you first watch YouTube videos (like those from Repair Guru or JerryRigEverything) to see what the plumes and mounts look like.

Step 1: Removing the back cover

The Redmi Note 5 cover is glued around the perimeter, so you need to gently tuck it in after warming up.

1. Heat the lid edge with a hair dryer (do not direct hot air to the display or camera!). Keep the hair dryer at a distance. 5-10 see, warm up. 20-30 second-only.
2. Insert a plastic mediator into the gap between the lid and the body (better start at the bottom edge where the charging connector is). Carefully drive the mediator along the body, separating the glue.
3. If the lid doesn't respond, warm it up again. Don't force it, you can break the latches!
4. When the lid is removed, remove it and put it aside. Be careful: it has a fingerprint scanner plume attached to it (if you have one in your model).

Step 2: Battery disconnection

Before you turn off the battery, be sure to take the charge off the capacitors (if the phone was charged).

1. Unscrew 10 screws that attach the metal plate above the battery (they are of different lengths – remember where they were!).
2. Carefully tuck the plate with the mediator and remove it.
3. Unplug the battery connector with a plastic mediator or tweezers.
4. If the battery is swelling, don't try to pull it out by force, it may burst. It's better to cut it neatly with a knife (slightly!) or use the thread by holding it under the battery.

Step 3: Installation of a new battery

Before installing the new battery:

• Clear the place under the battery from the residues of glue with alcohol.
• Make sure that there is no dust or oxidation on the contacts.
• If you have double-sided tape on the battery, stick it on the body. If you don't, put a thin layer of glue on it. B7000 edgewise.
• Connect the new battery connector and put it back in place, press it so the glue grabs.

Step 4: Build a Smartphone

Collect the phone in reverse order:

1. Set a metal plate and twist the screws (make sure they stand in their holes!).
2. Connect the fingerprint scanner plume (if any) and gently press the cover.
3. Soak the edges of the lid with a hair dryer (so that the glue is better grasped) and press it on the top. 1-2 minute.

After assembly, turn on the phone and check:

• 🔋 Charging is normal (without overheating).
• 📱 The fingerprint scanner works (if the plume was turned off).
• 🔊 The speakers and microphone are not silenced (sometimes after disassembly the settings are lost).

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The most common mistake when replacing a battery is to install screws incorrectly, if you confuse them with places, you can damage the motherboard! Take a picture of the screws before disassembling or arrange them in order.

5. Frequent mistakes and how to avoid them

Even if you follow the instructions, there are nuances that are often overlooked. TOP-5 Errors when replacing the battery with Redmi Note 5 and how to prevent them:

• 🔧 Display plume damage: occurs when you push too hard on the mediator when you remove the lid. Solution: warm up the glue longer and use thin plastic blades.
• 🔋 Short circuit: if you disconnect the battery, you touch the motherboard screwdriver. Solution: always turn off the battery first and plug the last one in.
• 📱 The fingerprint scanner is not working: the plume has broken or damaged during assembly. Solution: check the plume connection before final assembly.
• 🔊 The lid is not holding well: the glue is not grasped or it is too little. Solution: use a quality glue. B7000 and warm the cover with a hair dryer after installation.
• 🔌 Phone won't turn on: maybe the battery connector is not connected or the contacts are damaged. Solution: disassemble the phone again and check all connections.

If the battery is discharged too quickly after replacement, there are two possible reasons:

1. You bought a fake battery with an understated capacity.
2. The power controller on the motherboard is defective (in this case, only repairs in the service center will help).

6. How to prolong the life of a new battery: 7 rules of operation

To make the new battery last longer, follow these guidelines:

• 🔋 Avoid full discharge: Lithium-ion batteries don't like deep discharge.Try to charge your phone when the charge has dropped to 10-20%.
• ⚡ Don't keep on charging too long: after 100% turn off power.Constant "recharging" shortens lifespan.
• 🌡️ Avoid overheating: Do not put your phone in the sun, do not play heavy games while charging.
• 🔌 Use the original charger: cheap Chinese charging can give unstable voltage, which damages the battery.
• 📵 Disable unnecessary functions: GPS, Bluetooth, mobile data in the background drains the battery.
• 🔄 Calibrate the battery: once in a while 2-3 Fully discharge and charge your phone until the end of the month. 100%.
• 🛠️ Update: In new versions MIUI often optimize energy consumption.

If you bought a high-quality battery and follow the rules of operation, it will last. 3-4 You can use apps to check the battery status for a year without any noticeable loss of capacity:

• AccuBattery - shows real capacity and wear.
• AIDA64 — displays battery temperature and voltage.
• GSam Battery Monitor – analyzes the charge consumption of applications.

7. Alternative options: when to change the battery is not worth it

Although replacing the battery with Redmi Note 5 is a moderately complicated procedure, in some cases it is better to contact the service center:

• 🛠️ No experience in electronics repair: If you’ve never disassembled smartphones, the risk of damaging plumes or boards is pretty high.
• 🔧 The battery is very swollen: it is difficult to remove without the risk of damage to the case or display.
• 📱 Phone warranty: self-repair cancels Xiaomi warranty.
• ⚡ Charging problems: if the phone does not charge even with a new battery, the motherboard is to blame - you need a professional.
• 💰 No time or tools: Buying tools and batteries can cost more than repairing a service.

Replacement costs in service centers:

If you do decide to give your phone to the service, choose a trusted workshop with good reviews, ask before repairing to show the new battery (to make sure it is not fake) and check whether there is a warranty for work.

FAQ: Answers to Frequent Questions