The battery in Xiaomi Redmi Note 5 is one of the most vulnerable places after 2-3 years of active use. If your smartphone began to discharge in a few hours, spontaneously turn off at 20-30% charge or overheat during charging, it is likely time to replace the battery. The service center will charge from 1500 to 3000 rubles for this procedure, but with patience and a minimum set of tools you can do it yourself - saving money and gaining invaluable experience.
In this article, we will go through the entire process in detail, from fault diagnosis to final assembly of the device, you will learn how to choose a quality battery, what tools you will need, and how to avoid the typical errors that can lead to damage to the Redmi Note 5. Special attention will be paid to safety – working with lithium-ion batteries requires caution, and we will tell you how to minimize the risks.
⚠️ Important: If your smartphone is warranty-free, self-replacement of the battery will cancel it.
How to know if the battery is time to change: 5 obvious signs
Before you start the screwdriver, make sure the battery is the problem. Here are the key symptoms that indicate wear on the Redmi Note 5 battery:
- 🔋 The smartphone is running out of power. 3-4 hours with moderate use (social networks, instant messengers, calls).
- 🔥 The body is noticeably heated in the battery area during charging or operation.
- 📉 The percentage of charge "jumps" (for example, with a 40% drops 15%) or the phone is turned off when 20-30%.
- ⚡ The charge is extremely slow (longer). 3-4 hourly 100%) or stops at a certain percentage.
- 💥 Bloating of the back cover (noticeably, if you put the smartphone on a flat surface - it will swing).
If you see at least 2-3 of the signs on the list, the probability of battery wear is 90%. For accurate diagnostics, you can use applications like AccuBattery (available on Google Play), it will show the real capacity of the battery and its degradation. For example, if the original capacity of the Redmi Note 5 is 4000 mAh and the application shows 2500 mAh, it is time to change the battery.
⚠️ Warning: If the battery is swelling, you can't pierce it or try to flush it, it can cause a fire, in which case, immediately turn off your smartphone and start replacing it.
What battery to choose for Xiaomi Redmi Note 5: original vs analogues
The battery quality is not only the life of the smartphone, but also the safety of the battery, with three types of batteries for the Redmi Note 5 on the market:
| Type of battery | Pluses | Cons | Price (2026) |
|---|---|---|---|
| Original (Xiaomi) | Guaranteed quality, full compatibility, long service life | High cost, difficult to find in small towns | 2000–2800 ₽ |
| Analogues (brands: Camon, Baseus, Remax) | Cheaper than the original, often with increased capacity (up to 4500 mAh) | Low quality risk, possible problems with charge calibration | 800–1500 ₽ |
| No-name (no brand) | Very low price. | High risk of bloating, rapid degradation, possible charging problems | 400–700 ₽ |
We recommend choosing between the original battery and quality analogues from proven brands.
- 🔍 Check the labeling: the original battery should indicate Xiaomi MDY09EM (article for Redmi Note 5).
- 📦 Packaging should be whole, without damage, with a hologram and barcode.
- 🔋 Capacity should not exceed 4000 mAh – if the seller offers a battery of 5000 mAh, it is a fake.
- 🛡️ Protection against overheating and short circuit (check with the seller).
Where to buy:
- 🌍 Xiaomi’s official store (if you have one in your city).
- 🛒 Verified online stores: AliExpress (sellers with a rating above 98%), Beru, Citronix.
- 🔧 Local service centers (sometimes selling original parts).
💡
Check the reviews of the seller before you buy, especially if you are using AliExpress, and comments often describe the actual battery capacity after testing.
Required tools: what you need to replace
To replace the battery Xiaomi Redmi Note 5 you need a minimum set of tools, most of them can be bought in electronics stores or ordered on AliExpress in a set for repairing smartphones (cost – from 300 rubles).
Screwdriver cross (PH00 or PH0)
Plastic blades (2-3 pieces) or a mediator
Suction cup
Tweezers (preferably with curved ends)
Thermoclei or bilateral scotch (to fix a new battery)
Isopropyl alcohol (70% and higher) and cotton swabs
Fryer (for softening glue)
Multimeter (optional, to check the battery voltage)-->
More about each instrument:
- 🔧 Screwdriver. PH00 — It's used to unscrew small screws in the Redmi Note 5. The usual cross screwdriver won't work because the screws are so small.
- 📱 Plastic blades -- used to gently tweak the body and unplug the plumes. Metal tools can damage the board!
- 🧲 Suction cups help lift the display after heating the glue, and you can replace it with wide tape, but it's less convenient.
- 🔥 Hair dryer -- you need to soften the glue that the battery has glued to the body, and you can use a hair dryer (hot air mode»).
- 🧴 Isopropyl alcohol removes glue residues and cleans the contacts. Do not use acetone or solvent!
⚠️ Note: If you don’t have experience with electronics, practice on an old, unnecessary smartphone before replacing the battery in the Redmi Note 5. Mistakes when disconnecting plumes or working with the board can lead to a complete failure of the device.
How to Replace the Battery in Redmi Note 5
Now, to the process itself, follow the instructions carefully, because every step is important. If you're not sure about yourself, refer to the video guide at the end of this article.
Step 1. Turn off your smartphone and remove SIM-map.
- Press the power button and select Turn it off.
- Get the tray for you. SIM-cards with a paper clip (so as not to damage it during disassembly).
Step 2. Heat the back cover with a hair dryer.
- Set the hair dryer at a temperature of 60-70 ° C (not higher!).
- Warm up the edges of the back cover for 2-3 minutes, evenly driving the hair dryer.
- The goal is to soften the glue so that the lid moves away without damage.
Step 3. Remove the back cover.
- Suction or tape gently pull the lid up.
- Insert a plastic blade into the resulting gap and slowly lead it around the perimeter.
- If the lid doesn't lend itself, warm it up again.
What to do if the lid is not removed?
Step 4. Disconnect the battery plume.
- On the board, you'll see a small connector with a black lid -- this is a battery connector.
- Carefully tuck the lid with a spatula and disconnect the plume.
- Do not touch other elements of the board with tweezers - this can cause a short circuit!
Step 5. Remove the old battery.
- The battery is glued to the body, and you can put a plastic blade on it from any side.
- If the glue is too strong, drop a little isopropyl alcohol under the battery - it will dissolve the glue.
- Don’t pull the battery by the wires – they can come off!
Step 6. Install a new battery.
- Make sure that the new battery contacts match the old ones.
- Stick the battery onto double-sided tape or heat glue (comes complete with some batteries).
- Connect the plume to the board and snap the connector cap.
Step 7. Get your smartphone together.
- Make sure all the plumes are connected correctly.
- Close the back cover, pressing it until the snap of the latches.
- Put it in. SIM-map and turn on your smartphone.
💡
After replacing the battery, be sure to calibrate: fully discharge the smartphone before turning off, then charge to 100% without interruptions. Repeat the process 2-3 times for the charge indicator to work accurately.
Common Mistakes and How to Avoid Them
Even with careful operation, you can make mistakes that will lead to problems with the Redmi Note 5, and here are the most common ones and ways to prevent them:
- ⚡ Short circuiting occurs when you accidentally tweez the contacts on the board. Solution: Remove static electricity before you work (touch the grounded object) and use plastic tools.
- 🔧 Display plume damage -- if you pull the lid too hard. Solution: heat the glue evenly and take your time.
- 🔥 Battery overheating -- if you use a hair dryer at maximum temperature. Solution: keep the hair dryer at a distance. 10-15 corps-wise.
- 📉 Wrong calibration - after the battery is replaced, the battery shows the wrong percentage of charge. Solution: complete the full discharge-charging cycle 2-3 once.
⚠️ Note: If after replacing the battery, the smartphone does not turn on, check:
- Is the battery plume connected to the board?
- Have you damaged flexible plumes (display, power buttons)?
- Whether the back cover is properly installed (sometimes it presses on the board and interferes with the inclusion).
If the problem is not solved, the fee may be damaged, in which case it is better to contact the service center.
What to do after replacement: Calibration and care for the new battery
Successful battery replacement is only half the battle, so to make a new battery last, follow these guidelines:
- 🔄 Calibration: Fully discharge the smartphone before shutting down. Charge before 100% without interruption (do not use your phone while charging). 2-3 once.
Charging:
Xiaomi
Temperature:
Storage:
40-50%
Compliance with these rules will help to extend the life of a new battery to 2-3 years.
💡
If after replacing the battery, the smartphone began to discharge faster, check the background processes in Settings → Battery → Battery Use. Perhaps some application consumes too much power.
Video Instructions and Additional Resources
If you are more visually aware of the information, we recommend you to watch the video guide for replacing the battery with the Xiaomi Redmi Note 5:
Useful video (YouTube):
- 🎥 Replacing the battery Redmi Note 5 – Step-by-step for beginners
- 🎥 How to remove the back cover of Xiaomi without damage
- 🎥 Calibration of the battery after replacement
Forums and communities for consultation:
- 💬 4PDA — section on Xiaomi Redmi Note 5.
- 💬 MIUI Superforum - topics for repairs.
- 💬 Telegram chat Xiaomi Russia.