How to change the battery on Xiaomi Redmi Note 5: a full guide with photos and videos

Xiaomi Redmi Note 5 remains one of the most popular smartphones of the brand even years after its release — a reliable “middle” with good performance and long life. However, over time, even the best battery loses capacity: the phone starts to run out in a couple of hours, turns off at 20-30% charge or refuses to turn on without charging. If you encounter these problems, it’s time to think about replacing the battery.

In this article, you will find a step-by-step instruction for replacing the battery with a Redmi Note 5, taking into account all the nuances from choosing a new battery to assembling the case without gaps. We will analyze which tools you will need as avoidable errors (for example, damage to the display plume), and where to buy the original battery, rather than a cheap Chinese counterpart that will last for six months, and you will learn whether to contact the service center or you can manage yourself – even if you have no experience in repairing equipment.

We warn you that the process requires care and patience, if you are not confident in your abilities, you should trust the replacement to the professionals, but if you are willing to take the risk, follow our recommendations, and your Redmi Note 5 will work like a new one again!

Signs that it is time to change the battery

How do you know that the problem is in the battery, not software failures or damage to the charger?

• 🔋 Phone's running out of power. 2-3 hours with moderate use (social networks, instant messengers), although previously held the charge all day.
• ⚡ The charger jumps: for example, shows 50%, And then a minute later, it falls to 20% or the phone is turned off when 15-20% charge.
• 🔌 The smartphone does not turn on without connecting to the charger, even if it was shown before turning off 10-15%.
• 🌡️ The battery heats up heavily during charging or playing (hotter than usual).
• 📉 In settings (Settings) → Battery → The condition of the battery) the capacity shows less 70-75% from the original (e.g, 2500 m.h. 4000 mAhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh).

If you have at least 2-3 items on your Redmi Note 5 list, it's probably the battery's fault, but you should rule out other reasons before replacing:

• 🔄 Try resetting to factory settings (Settings) → Additionally. → Recovery and resetting. Sometimes background processes eat away at charge.
• 🔌 Check the charger and cable - they may not be giving enough current.
• 📱 Install an app like AccuBattery (available on Google Play) to analyze the actual state of the battery.

⚠️ Note: If the phone suddenly turns off 30-40% Charge, but after rebooting shows 0% — This is a sign of a very bad wear on the battery, and in this case, a replacement is required, because the risk of a sudden shutdown at a critical moment (for example, during navigation) is very high.

If all signs are confirmed, proceed to preparation.

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

The quality of the battery depends on whether it lasts a year or if it has to be changed again in six months.

1. Xiaomi’s original battery is the best choice, but it’s hard to find it. Xiaomi doesn’t sell batteries at retail, so the original can only be bought through service centers or trusted suppliers (for example, AliExpress from official sellers with a rating of 98%+). Articularity of the original battery: MBJ405300 (4,000 mAh capacity, voltage 3.85V).
2. The best-quality ones are batteries from proven brands like Baseus, Remax or ZMI (a Xiaomi subsidiary), which are cheaper than the original, but with the right choice, they will last 1-2 years. Look for models with a capacity of at least 3800 mAh.
3. Cheap Chinese counterfeits are sold for the first time 300-500 rupees, but often have real capacity 2000-2500 mAh instead of the stated 4000. Such batteries quickly lose charge and can swell.

Where to buy:

• 🛒 Xiaomi’s official service centers are a guarantee of the original battery, but the price is higher (about the same time). 2000-2500 work-rate).
• 🌍 AliExpress – Look for sellers with a rating 97%+ and reviews on the photo (example: Xiaomi Mi Store Official or DYS Store? Price: 800-1200 ruble.
• 🏬 Local parts stores – check certificates and ask for warranty (at least 3 months).

⚠️ Note: If you buy a battery on AliExpress, be sure to check the production date (indicated on the sticker). Battery older than 6 months loses up to 20% of capacity before use.

Critical: Don't buy batteries labeled "Premium" or "Ultra Capacity" from unknown brands, which is a marketing ploy. The actual capacity of these batteries rarely exceeds 3000 mAh.

Battery Replacement Tools: What You Need

To disassemble the Redmi Note 5 and replace the battery, you will need:

Plastic blades (mediator) for disengaging the body|Set of screwdrivers (cross-haul) PH00, flat-footed 1.5 mm)|Screen suction cup|Tweezers (preferably magnetic)|Hair dryer or thermo-air station (for softening glue)|Isopropyl alcohol (90%+) clean-up|New battery (with or without adhesive base)|Double-sided tape or glue B7000 (glueless)-->

Where to buy tools:

• 🔧 Smartphone repair kit – sold on AliExpress (price) 300-500 Or in a Chip and Deep store, look for kits labeled "For Xiaomi».
• 🔥 Hair dryer - suitable construction or even household, but with temperature adjustment (you need to heat to 60-80°C, no higher!).
• 🧴 Isopropyl alcohol - sold in pharmacies or electronics stores (used to clean contacts from glue).

If you don't have a thermal air station, you can use a hairdryer, but be careful: overheating can damage the display or motherboard. The alternative is to gently tuck the body with a plastic blade, but it's longer and more risky.

💡

Before disassembling, take a photo of each step on your phone or print out the instructions, which will help you to properly assemble your smartphone back, especially if you are doing repairs for the first time.

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

Now, to the most critical stage, follow the instructions carefully, because one error can damage the plume of the display or the motherboard.

Step 1: Turn off and prepare the phone

Before the disassembly:

1. Turn off the phone (Plug the power button → Turn off).
2. Extract. SIM-card and memory card (if any).
3. Remove the case and clean the case of dust (you can wipe with alcohol).

Step 2: Removal of the back cover

The Redmi Note 5 has a glue body, so you can't just take the lid off.

1. Heat the edge of the back cover (around the perimeter) with a hair dryer for 1-2 minutes. Keep the hair dryer at a distance of 5-7 cm so as not to overheat the plastic.
2. Insert a plastic blade into the gap between the case and the screen (start at the bottom edge where the charging connector is).
3. Carefully drive the blade along the body, separating the glue. If the lid does not lend itself, warm up again.
4. When the lid starts to move, remove it completely. Be careful, there are plumes underneath.

Step 3: Shutting off the battery

Before touching the internal components, be sure to turn off the battery:

1. Find the battery plume – it is located at the top of the board, under metal protection.
2. Carefully put a plastic spatula or tweezers on the connector.
3. Check with a multimeter (if any) that the voltage at the battery contacts is 0V.

⚠️ Note: If you miss this step and accidentally close the contacts of the battery with a metal tool, it can lead to fire or explosion of the battery!

Step 4: Remove the old battery

The battery in the Redmi Note 5 is glued to the body to remove it.

1. Put a plastic blade on the battery from any end, and if the glue is too strong, put some isopropyl alcohol under the battery, and it will dissolve the glue.
2. Carefully pull on a special black tape (pull-tab), if you have one. If not, pick up the battery a little bit from different sides.
3. Don’t use metal tools – they can puncture the battery!

If the battery is swelling, don't try to prick it or bend it, it's dangerous. Take it out carefully and pack it right into the recycling bag.

Step 5: Installation of a new battery

Before installing the new battery:

• Clear the place under the battery from the residues of glue with alcohol.
• If the new battery does not have a glue base, apply double-sided tape or B7000 glue.
• Connect the battery plume to the motherboard.
• Put the battery back in place and press it (but not too hard).

Step 6: Build the phone

Collect the phone in reverse order:

1. Make sure all the plumes are connected (display, camera, buttons).
2. Close the back cover and press it so that the glue is grasped. You can use clamps or a heavy book on the back. 10-15 minute.
3. Turn on your phone and check the battery, sensor and buttons.

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

(2) Is the display plume damaged (a common disassembly problem).

3) Are the battery contacts closed (check multimeter).-->

Frequent Mistakes and How to Avoid Them

Even experienced technicians sometimes make mistakes when replacing batteries, and here are the most common problems and how to prevent them:

• 🔧 Display plume damage occurs when you pull the lid too hard or use metal tools. Solution: Always use plastic blades and heat the body with a hairdryer.
• 🔥 Overheating of the battery or board - if you overheat with a hairdryer, the chip may become soldered off or the battery will swell. Solution: keep the hairdryer at a distance 5-7 Do not heat one point longer. 10 seconds.
• 📵 The phone doesn't turn on after assembly -- usually the fault is the wrong connection of the plumes or closed contacts. Solution: disassemble the phone again and check all connections.
• 🔋 The new battery discharges quickly - you may have bought a fake or not calibrated the battery. 2-3 full-cycle.

If the battery is discharged in a few hours after replacement, check:

• Real capacity through the AccuBattery app.
• Are there any background processes that “eat” the charge (Settings → Battery → Use).
• Is the new battery swelling (swipe your finger on the back cover - if there are bulges, the battery is defective).

Calibration of the new battery: why it matters

Once the battery is replaced, it needs to be calibrated so that the charge controller can correctly determine the charge level, otherwise the phone can show 100%, and after an hour suddenly shut down.

How to calibrate:

1. Charge your phone to 100% and hold on charging for another 1-2 hours.
2. Turn off charging and use the phone until it is completely discharged (until it turns off itself).
3. Charge again to 100% without interruption.
4. Repeat the cycle 2-3 times.

You can also use apps like AccuBattery (available on Google Play) to track the actual capacity and condition of the new battery.

If the phone still shows a faulty charge after calibration, there may be a problem with the power controller on the motherboard, in which case only repairs at the service center will help.

Should I change the battery myself or contact the service?

Self-replacement of the battery is cheaper (the price of batteries + tools is about 1000-1500 rubles), but has risks:

It is worth contacting the service if:

• You've never taken out smartphones.
• Phone for warranty (self-repair cancels it).
• The battery is swelling and can be dangerous.
• After the replacement, problems appeared (the sensor does not work, the screen does not turn on).

If you are confident and willing to take risks, replacing yourself will save money and provide invaluable experience.

FAQ: Answers to Frequent Questions