Xiaomi Redmi Note 5 Pro (codenamed Whyred) was released in 2018, but still remains popular with users due to its balanced performance and reliability. However, over time, even the best battery loses capacity: the phone starts to run out in a few hours, turns off at 20-30% charge or requires constant recharging. If you are faced with these problems, it is time to think about replacing the battery.
Many owners are afraid to disassemble their smartphone for fear of damaging the plumes or display. In fact, the procedure for replacing the battery with the Redmi Note 5 Pro does not require professional skills if you act carefully and follow the proven instructions. In this article, we will discuss the entire process in detail, from choosing a new battery to the final test, you will learn what tools you need, how to avoid typical errors and what to do if the phone does not turn on after replacing.
⚠️ Important: If your Redmi Note 5 Pro is still warranty, self-replacement of the battery will cancel it.
1. Signs of battery wear: when is it time to change?
Lithium polymer batteries in smartphones degrade over time, even if you follow the charging cycle.Here are the key symptoms that the Redmi Note 5 Pro battery needs to be replaced:
- 🔋 The phone discharges in 3-4 hours with moderate use (social networks, messengers, calls).
- 📉 The percentage of charge “jumps”: for example, from 40% immediately drops to 15% after a reboot.
- 🔌 The smartphone turns off at 20-30% charge and turns on only after connecting to charging.
- 🌡️ Battery heats up when charging or playing (above 40-45)°C).
- ⚡ Autonomous life has decreased by 2-3 times compared to the new state.
Check the battery status through an engineering menu or apps like AccuBattery (available on Google Play). If the battery capacity has dropped below 70-75% of the original capacity of the Redmi Note 5 Pro - 4000 mAh, it is time to change it. Also worth paying attention to the physical condition: bloating (especially from the back cover) - a direct signal to urgent replacement!
⚠️ Warning: A billowing battery can damage the display or motherboard.If the smartphone case is deformed, don't delay replacing it!
Which battery should I choose for the Redmi Note 5 Pro?
The original battery for Xiaomi Redmi Note 5 Pro is labeled BM47 or BM48 (depending on the batch) and a capacity of 4000 mAh. However, there are many analogues of different quality on the market.
| Type of battery | Advantages | Deficiencies | Price (roughly) |
|---|---|---|---|
| The original (Xiaomi) | Compatibility guarantee, long service life, accurate capacity | High cost, difficult to find on sale | 2500–3500 ₽ |
| Premium class analogue (ZMI, Baseus) | Quality close to the original, often with increased capacity (up to 4200 mAh) | Prices above average, fakes are possible | 1800–2500 ₽ |
| Budgetary analogue (unknown brands) | Low price, fast delivery | Low capacity risk, rapid wear and tear, possible controller problems | 800–1500 ₽ |
We recommend that you choose batteries with a built-in protection controller (such as models from ZMI or Remax), which prevent overheating and overcharging, which prolongs the life of the battery.
- 🔍 Check that the battery is marked with 4000 mAh and the inscription Redmi Note 5 Pro (or whyred).
- 📦 The kit should be two protective stickers (to isolate contacts) and a plume (if sold in the set).
- 🛡️ Avoid batteries without a controller – they can damage the motherboard.
⚠️ Warning: 5000mAh batteries and above for the Redmi Note 5 Pro are a hoax! The maximum compatible capacity is 4200mAh (and even with the risk of overheating).
3. Tools and training required
To replace the battery with the Redmi Note 5 Pro, you will need:
- 🔧 Plastic blades (2-3 pieces) for dissociating the body.
- 🔨 Cross screwdriver (size) PH00 or PH0) screw.
- 🧲 Magnetic mat or screw container (so as not to lose).
- 🔥 Hair dryer or thermo-air station (for softening glue).
- 🧴 Isopropyl alcohol (90%+) clean-up.
- 📱 New battery with a set of stickers.
- 🛠️ Suction (optional, to remove the back cover).
Also prepare the workplace:
- Work on a flat, clean surface (it is better to cover the table with paper).
- Turn off your smartphone and remove it. SIM-memory-card.
- If the battery is swelling, do not pierce it - it can lead to fire!
⚠️ Warning: Do not use metal blades - they can damage plumes or body. Plastic mediators are safer.
☑️ Preparation for battery replacement
4. Step-by-step instruction: disassembly of the smartphone
Disassembly of the Redmi Note 5 Pro requires care, since the body is glued together and the plumes are fragile.
Step 1: Removing the back cover
1. Heat the back cover with a hair dryer (temperature ~60°C) for 1-2 minutes to soften the glue.
2. Insert a plastic blade into the gap between the body and the cover (start at the bottom edge where the charging connector).
3. Carefully drive the shoulder blade around the perimeter, separating the lid. If you feel resistance, heat the area again.
Step 2: Shutting off the battery
1 Unscrew 10 screws (they may differ in length - remember where you were!).
2. disconnect the battery plume using a plastic blade (plug the connector up).
⚡ Critical: After the battery is turned off, wait 1-2 minutes for the capacitors on the board to run out.
Step 3: Remove the old battery
1. The battery is glued to the body. Put a plastic spatula on it and pull the black tape (truck tongue).
2 If the glue is too strong, drop a little isopropyl alcohol under the battery - it will dissolve the glue.
3. dispose of the old battery according to the rules (do not throw it in the usual garbage!).
📌 Tip: If the tongue is torn, use two shoulder blades to evenly lift the battery from both sides.
What to do if the battery is too tight?
5. Installation of a new battery and assembly
Before installing the new battery:
- Make sure that there is no dust or glue residue on the contacts (wipe with alcohol).
- Remove the protective film from the new battery, but do not remove the stickers on the contacts!
- Stick the battery to double-sided tape (comes with) or use the original glue.
Assembly order:
- Connect the plume of the new battery to the motherboard.
- Put the battery in place and press it (make sure it lies flat).
- So, make sure that you have all the holes in the hole.
- Stick the back cover. You can use the B-7000 or some other plastic glue for reliability.
⚠️ Note: If the phone does not turn on after assembly, check:
- Is the battery plume tightly connected (sometimes it departs during assembly).
- Are the contacts closed (make sure the security stickers are in place)
- Are the screws confused (long screws can damage the board!).
💡
Before final assembly, turn on the phone without the back cover and check if the new battery is recognized (the settings should show 100% charge or real level).
Battery calibration and testing
After the battery is replaced, you need to calibrate it so that the system correctly displays the charge level.
- Charge your phone to 100% and hold on charging for another 1-2 hours.
- Turn off charging and use your smartphone until it is automatically turned off (do not turn it on until it is completely discharged!).
- Connect to charging and charge up to 100% without interruptions.
- Repeat the cycle 2-3 times.
Also check:
- 🔋 Autonomous operation time (should increase by 1.5-2 times).
- 🌡️ Battery temperature (normal to 35-40)°C when charging).
- ⚡ Charging speed (must be consistent with the original — ~10-15% in 15 minutes).
If the phone is quickly discharged after replacement, possible reasons:
- 🔌 Low-quality battery (capacity below the declared).
- 📱 Software failure (reset settings via Settings) → System system → Resetting settings).
- 🔥 Background processes (check in Settings) → Battery → Battery utilization).
💡
If the battery is not recharged after the battery is replaced, check the battery calibration first. In 80% of cases, the problem is solved with 2-3 full charge-discharge cycles.
7. Frequent mistakes and how to avoid them
Even experienced users sometimes make mistakes when replacing the battery.
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Use of metal tools | Damage to plumes, closure of contacts | Work only with plastic blades |
| Battery overheating with a hairdryer | Bloating or ignition of the battery | Heat no higher than 60-70°C, do not direct the air flow directly to the battery |
| Installation of the battery without protective stickers | Short circuit, failure of the motherboard | Check for insulation stickers on contacts |
| Tangled screws | Damage to board or display | Put the screws in order or photograph their location |
Critical error: trying to charge the phone with a bloated battery, which can cause the battery to explode! If you notice a deformation of the case, immediately turn off the smartphone and start replacing.
⚠️ Warning: If the phone doesn't turn on after you've replaced it, but when you connect to the charger, the indicator vibrates or lights up, the battery plume is a problem.
8. Alternatives: Service center vs. self-replacement
If you're not sure about your abilities, you can go to the service center.
- 🏠 Self-sustaining replacement:
- 🔧 Service centre:
If you choose a service, give preference to official Xiaomi partners or proven workshops with good reviews. Ask what battery will be installed, and ask for a guarantee for work.
📌 Tip: Before going to the service take a picture IMEI phone (dial *#06#) and body condition, which will help to avoid fraud (e.g., part swapping).