Xiaomi Redmi Note 8 Pro is one of the most popular smartphones of 2019, but even after 3-4 years of active use, battery problems begin. If your device suddenly turns off at 20-30% charge, quickly discharges or the body is swollen, it’s time to think about replacing the battery. In this article, we will discuss how to change the battery on the Redmi Note 8 Pro with your own hands, without contacting the service center.
Self-replacement costs 3-5 times less than official service, but requires care and preparation. We will describe each step in detail, from choosing a new battery to assembling a smartphone. It is important to understand that improper actions can damage the plumes or motherboard - so follow the instructions carefully.
1.Signs of battery wear on Redmi Note 8 Pro
How do you know if a battery really needs to be replaced?
- 🔋 The smartphone is turned off when 20-30% Charge, although the settings show a normal level
- ⚡ Quick discharge (less than) 4-5 hours with moderate use)
- 🔥 Overheating of the body during charging or work
- 📏 Bloating of the back cover (seen by the gaps between the screen and the frame)
- ⏳ Long charging (more than that) 3-4 hourly 0 before 100%)
If you see at least 2-3 signs on the list, it's likely that the battery capacity has dropped below 70% of its face value, and you can check the exact status through an engineering menu or an application like AccuBattery.
Attention! A bloated battery is dangerous, it can damage the screen or even ignite. If the case is deformed, don't delay replacing.
2. Which battery to choose for replacement?
The original battery for the Redmi Note 8 Pro is BM47-marked and has a capacity of 4500 mAh.
| Type of battery | Capacity | Price (rupe) | Pluses | Cons |
|---|---|---|---|---|
| The original (Xiaomi) | 4500mAh | 1800-2500 | Quality assurance, exact compatibility | Expensive, hard to find. |
| Analogue (Baseus, Remax) | 4500-5000 mic | 1200-1800 | Cheaper, sometimes more capacity | Maybe wear out faster. |
| Increased capacity | 5000-6000 mAh | 2000-3000 | Longer working. | Fatter, maybe not fit into the body. |
We recommend either the original or proven Baseus or Remax, and avoid cheap no-name batteries, which often have real capacity 20-30% below the stated capacity.
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Check the seller reviews before you buy. On AliExpress, look for stores with a rating of at least 98% and orders from 1000+.
3. Required tools for replacement
To disassemble the Redmi Note 8 Pro and replace the battery, you will need:
- 🔧 Screwdriver kit: cross-haired (PH00), The five-pointed (for the sleeves)
- 🧲 Screen suction cup (or mediator)
- 🔥 Hair dryer or thermo-air station (for softening glue)
- 🧴 Isopropyl alcohol (90%+) glue-cleaner
- 📦 Plastic blades or cards for smearing the body
- 🔋 New battery with adhesive base
If you do not have a hair dryer, you can use a regular household, but be careful - do not overheat the body above 60-70 ° C.
Where can I buy tools?
Step-by-step instructions for replacing the battery
Now, let's get to the process. Turn off your smartphone and take it out. SIM-card with memory card before the start of work.
Turn off the smartphone and remove the tray SIM-map
Prepare the workplace (clean surface, good lighting)
Warm up the back cover with a hair dryer (1-2 minutes)
Disconnect the battery plume before further disassembly-->
Step 1: Removing the back cover
Heat the edge of the back panel in a circle to soften the glue. Then gently apply the lid with a plastic blade, starting at the bottom corner (where the charging connector is). If the lid does not respond, warm up again.
Step 2: Shutting off the battery
When you take the lid off, you'll see a battery with a black plume, and the first thing you do is disconnect it, you'll put a flat screwdriver on the connector, and you'll never take apart a smartphone with a battery on it, because it can cause you to short circuit!
Step 3: Remove the old battery
The battery is glued to the body. You can put it on a plastic card and slowly pull it up. If the glue is too strong, put the isopropyl alcohol under the battery, and it will dissolve the glue in 5-10 minutes.
Step 4: Installation of a new battery
Make sure the new battery is the same size, stick it on double-sided tape, plug it in, make sure the contacts fit tightly.
Step 5: Build a Smartphone
Place the back cover in place and press it down. If there are gaps, warm up with a hair dryer and crush it with a weight (for example, a book) for 10-15 minutes.
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The main rule is not to rush. 80% of damages in self-repair are due to haste.
Possible problems and solutions
Even with a careful replacement, it can be difficult.
⚠️ Attention! If the smartphone doesn't turn on after assembly, check the battery plume and display connection. Often contacts leave when the lid is installed.
- 🔌 Not charged - clean the charging connector with alcohol, check the cable
- 📱 The screen is not responding – reconnect the plume of the touch screen
- 🔋 Fast discharge – maybe a new battery is defective or not calibrated
- 🔊 Speakers do not work - check the sealing mesh (may move during assembly)
If after replacing the battery discharges in a few hours, perform a calibration: completely discharge the smartphone, then charge to 100% without interruptions.
Calibration of the new battery
To make the new battery work properly, you need to train it.
- Charge your smartphone to 100% and hold on charging for another 1-2 hours
- Disconnect from the network and use until full discharge (before switching off)
- Repeat the cycle 2-3 times
This will help the power controller to more accurately determine the level of charge. Also recommend turning off Settings → Battery → Optimizing charging if it is on.
7. Should I contact the service?
The self-substitution will be in 1200-2500 ruble (battery price) + The service center will take the same job. 3000-5000 However, there are times when it is better to trust professionals:
- 🛠️ No experience in disassembling electronics
- 🔧 Trails or connectors damaged
- 💥 The battery swelled and deformed the body
- 📱 Smartphone warranty (self-repair it cancels)
If you are not confident in your abilities, it is better to overpay, but avoid the risk of damaging the motherboard.