Xiaomi Redmi 5 Plus (codenamed Vince) was released in 2018, but still remains popular due to its balanced performance and low price in the secondary market. However, after 4-5 years of operation, even the most reliable battery loses up to 40-50% of capacity, and the phone begins to run out in a couple of hours or turn off at 20-30% charge. If you encounter these problems, it is time to think about replacing the battery.
In this article, you will find a step-by-step guide to replacing your battery with a Redmi 5 Plus, taking into account all the nuances from choosing a new battery to assembling the case without damage. We will analyze what tools you need as avoidable errors (for example, damage to the display plume), and give recommendations for calibrating the new battery. If you have never disassembled your smartphone, don’t worry: with the right approach, the procedure will take less than an hour.
When exactly do I need to replace the battery?
Before you start the screwdriver, make sure that the battery is the problem, and here are the key symptoms that signal the need to replace:
- 🔋 Phone's running out of power. 2-3 hours with moderate use (social networks, messengers).
- 📉 The percentage of charge “jumps” (for example, from 40% immediately drops to 15%).
- ⚡ The smartphone is turned off when 20-30% although it had previously been used before 5-10%.
- 🔥 The battery swelled (seen on a raised display or body).
- 🛑 The device does not turn on from charging or requires "resuscitation" via Fastboot.
If you have at least 2-3 items on your Redmi 5 Plus list, you probably have a battery that is worn out, and you can check it through apps like AccuBattery (reveals real capacity) or built-in statistics in Settings → Battery. Normal capacity for the Redmi 5 Plus is 3900-4000 mAh. If the value is below 3000 mAh, the battery must be replaced.
⚠️ Warning: If the battery is swollen, don't delay replacement! a bloated battery can damage the display, motherboard or even ignite when mechanically exposed.
What battery should I use for the Redmi 5 Plus?
The original battery for Xiaomi Redmi 5 Plus is marked BM47 and nominal capacity of 4000 mAh. However, the market is full of fakes and low-quality analogues that will last from strength six months.
- 🏷️ Marking: Must match the original (BM47 3.85V 4000mAh).
- 📦 Packaging: Xiaomi’s original batteries are sold in a white box with a hologram and a sleek look. QR-code.
- 🔍 Contacts: The battery board should have a charge control chip (NTC thermistor and protection against KZ).
- 🛡️ Guarantee: Reliable sellers give a minimum of 6 months.
The best options to buy:
| Type of battery | Capacity | Price (2026) | Where to buy | Pros/minuses |
|---|---|---|---|---|
| Original Xiaomi BM47 | 4,000 mAh | 1500–2500 ₽ | Mi Store, AliExpress (official sellers) | ✅ Maximum resource❌ High price. |
| High quality analogue (e.g. Patona) | 4,000-4200 mAh | 800–1500 ₽ | Beru, Wildberries, Specialty Stores | ✅ Good Price/Quality Relationship❌ It can last 20% less than the original. |
| Budgetary analogue (no-name) | 3800-4,000 mAh | 500–900 ₽ | AliExpress, markets | ✅ Cheap option❌ Risk of bloating through 3-6 months |
Critically, never buy batteries with a capacity above 4200mAh for the Redmi 5 Plus! These batteries are often fake and their controllers are not compatible with the smartphone motherboard.
Battery replacement tools
To disassemble the Redmi 5 Plus and replace the battery, you will need:
Special plastic spatula (or mediator)|Set of screwdrivers (cross-haul) PH00, flat-footed 1.5 mm)|Screen suction cup|Thin-ended tweezers|Isopropyl alcohol (90%+) and cotton-stick|Dryer or thermo-air station (optional)|New battery BM47-->
Where to buy tools:
- 🛒 Smartphone repair kits (e.g. iFixit Pro Tech Toolkit) – on Wildberries or Ozon (~1500 ₽).
- 🔧 Individual tools: plastic blades are sold in electronics stores, and screwdrivers - in any household.
- 🔥 Dryer can be replaced with a conventional household, but it is better to use a building with temperature adjustment (maximum 80).°C).
If you do not have experience disassembling, we recommend you to buy a magnetic screw mat - they are easily lost, and in Redmi 5 Plus there are more than 10 pieces of different lengths!
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Before disassembling, take a picture of the location of the screws on the motherboard, which will help not confuse them when Assembly, especially if they are of different lengths.
Step-by-step instructions for replacing the battery
Now, to the process itself, follow the instructions carefully, because one wrong step can damage the plumes or the motherboard.
Step 1: Turn off and prepare the phone
1. Turn off Redmi 5 Plus completely (press the power button and select Turn off).
2. Remove the tray for SIM-paper-card.
3. Heat the back cover with a hair dryer (~60°C) for 2-3 minutes to soften the glue.Do not overheat - this can damage the plastic!
Step 2: Removal of the back cover
1. Place the suction cup to the bottom edge of the phone (above the USB-C connector).
2. Pull up carefully to create a gap. Put a plastic shoulder blade in it.
3. Swipe the perimeter of the case, separating the lid. Be careful with the fingerprint plume (right of the camera)!
⚠️ Warning: If the lid fails, don't force it, dryer the problem areas again. Too much pressure can break the latches.
Step 3: Shutting off the battery
1 Unscrew 10 screws that fix the metal plate above the battery (use the PH00 cross screwdriver).
2. Take the plate off carefully and put it aside.
3. Unplug the battery connector with a plastic spatula. Don't pull the wires!
What happens if you don’t turn off the battery before you disassemble?
Step 4: Remove the old battery
1. Tap the battery with a plastic blade of adhesive tape (usually it is on the upper edge).
2 Pull slowly and evenly. If the battery fails, heat it with a hair dryer (maximum 70°C) and drip the isopropyl alcohol under it, it will dissolve the glue.
3. Recycle old battery according to your region’s rules (don’t throw it away in the trash!).
Step 5: Installation of a new battery
1. Remove the protective film from the new battery and check that the contacts match the connector on the board.
2. glue the battery to double-sided tape (comes with) or use the original glue (e.g., B-7000).
3. Connect the battery connector to the motherboard. Make sure it sits until the end - unpressed contact can lead to poor charging.
Step 6: Build the phone
1. Put the metal plate back in and twist all 10 screws. Don't pull it over! It could damage the thread.
2. Stick the back cover. Warm it up with a hair dryer (60°C) and press it for 1-2 minutes.
3. Put the tray in. SIM-card and turn on the phone.
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After replacing the battery, be sure to calibrate: completely discharge the phone before turning off, then charge to 100% without interruption. Repeat the procedure 2-3 times to accurately display the charge level.
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when replacing batteries, and here are the most common problems and ways to prevent them:
- 🔌 Display plume damage: occurs when you push too hard on the screen cover. Solution: use plastic shoulder blades and take your time.
- 🔥 Battery overheating when soldering: If you solder contacts (which is not required for the Redmi 5 Plus), the temperature should not be higher than 300°C. Solution: Use a temperature-adjusted station.
- 📱 The phone doesn't turn on after assembly: it's often the fault of an unwed battery connector or a forgotten motherboard screw.
- 🔋 Fast discharge of the new battery: if the battery goes down in a day, it may be defective or not calibrated. Solution: execute 2-3 full discharge/charge cycle.
If the phone is replaced with a "Battery not supported" error, it means that the controller does not recognize the new battery. 90% of the time, it helps to reset settings through Settings → Additional → Recovery and Reset. If the error persists, the battery is unoriginal or damaged.
Calibration of the new battery
The new battery requires proper calibration to ensure that the charge controller accurately displays the charge level. 2-3 day-time:
- Completely discharge the phone before automatically shutting down.
- Connect the original charger and charge up to 100% without interruptions.
- Turn off charging and use your phone until it is completely discharged (do not recharge!).
- Repeat cycles 2-3 times.
After calibration, check the actual capacity via AccuBattery or Settings → Battery → Status. The normal value for a new battery is 3900-4100 mAh.
If the capacity is significantly lower (e.g. 3,500 mAh), there are two possible causes:
- Battery defective or fake.
- The charge controller on the motherboard is not working correctly (diagnosis is required in the service).
Should I change the battery myself or give it to the service?
Replacing the battery in the service center will cost 1500-3000 ₽ (If you've never taken a smartphone apart, you might want to trust the professionals. But self-replacement has its advantages:
| Criteria | Self-sustaining replacement | Service centre |
|---|---|---|
| Cost | 500–2000 ₽ (spare parts) | 1500–3000 ₽ (job + spare parts) |
| Time. | 40-90 minutes | 1-3 days (depending on the load) |
| Guarantee | Battery only (if you bought with a guarantee) | 1-6 months to work and spare parts |
| Risks. | Damage to plumes or boards in case of negligence | Minimum (if the service is verified) |
If you've decided to change your battery, follow this rule: it's better to spend an extra 20 minutes on accuracy than 2 hours on remediation. Most of the breakdowns in self-repair are due to rush.
If you are not confident in your abilities, choose a service with good reviews.
- 📌 Availability of a work guarantee (minimum 1 month).
- 🔧 Use of original or certified batteries.
- ⭐ Rating on Yandex.Maps or Google (not lower than 4.5).