Smartphone Xiaomi Redmi Note 8 Pro (model number M1906G7G) remains popular even 5 years after the release - thanks to the powerful processor Mediatek Helio G90T, 64-MP camera and a capacious battery of 4500 mAh. However, over time, the battery capacity inevitably falls: the phone discharges in a few hours, turns off at 20-30% charge or refuses to turn on. If your Redmi Note 8 Pro has become "hold" less than a day with moderate use - it's time to think about replacing the battery.
In this article, you will find step-by-step instructions for replacing your battery with photos, a list of tools you need, tips for choosing a quality battery and answers to frequent questions. We have taken into account all the nuances from removing the glue layer to connecting the power plume correctly. And if you have never disassembled a smartphone, don’t worry: the Redmi Note 8 Pro is a device with medium disassembly difficulty (6/10 on the iFixit scale).
Signs that it is time to change the battery
Before you start the screwdriver, make sure the battery is the problem. Here are the key symptoms of a worn-out battery on the Redmi Note 8 Pro:
- 🔋 The phone discharges in 3-4 hours with normal use (social networks, instant messengers, calls).
- ⚡ Charging jumps: for example, from 50% immediately drops to 15%, or the phone turns off at 20-30% charge.
- 🔥 The body is noticeably heated in the battery area (even without load).
- 🛑 The device does not turn on after full discharge, although charging is ongoing (the indicator burns).
- 📉 Settings menu → The state of the battery capacity shows less than 80% of the original (3600 mAh instead of 4500 mAh).
If you know 2-3 items from the list, the battery definitely needs to be replaced. You shouldn't delay repairs: a worn-out battery can swell and damage the screen or motherboard. By the way, check the phone's case on a flat surface: if it "swings" like a swing, this is a sure sign of bloating.
⚠️ Warning: If the battery is already swelling, do not try to puncture or bend it! This can lead to fire.
Which battery to replace?
The original battery for the Redmi Note 8 Pro is BM47 (or DM-BM47) and has a capacity of 4500 mAh. However, the market is full of fakes and low-quality analogues.
| Parameter | Recommended value | What to check |
|---|---|---|
| Capacity | 4500-4600 mAh | Do not take batteries with a declared capacity of 5000+ mAh – this is a scam. |
| Tension. | 3.85–3.9 V | It should be indicated on the label. Deviation ±0.1 V is acceptable. |
| Marking | BM47, DM-BM47, HB476545ECL | Counterfeit products are often labeled as BM46 or BM48. |
| Manufacturer | ATL (Amperex), Sunwoda, Desay | Avoid no-name brands. Originals are supplied by Xiaomi in a hologram package. |
| Price. | 1 200–2 500 ₽ | Cheap batteries (up to 800) ₽) They are usually of poor quality and quickly lose capacity. |
Where to buy it?
- 🛒 Xiaomi service centers (warranty 6-12 months, but the price is higher).
- 🌍 Verified online stores: AliExpress (sellers rated 98%+), I'll take it, Yandex Market.
- 🔧 Local phone repair services (often selling batteries in bulk with warranty).
⚠️ Note: If you buy a battery on AliExpress, pay attention to the reviews from the photo! scammers often send empty boxes or batteries from other models (for example, from the Redmi Note 7).
Battery replacement tools
To disassemble the Redmi Note 8 Pro and replace the battery, you will need:
- 🔧 Screwdriver kit: cross-haired PH00, flat 1.5 mm, five-pointed Y00 (back-coat).
- 🧲 Suction (to remove the screen) or mediator (plastic shoulder blade).
- 🔥 Dryer (power 1000-1500 W) or heating platform for softening glue.
- 🧴 Isopropyl alcohol (90%+) or a special adhesive solvent (e.g. Loctite 7649).
- 📦 Plastic blades or cards to separate parts (metallic can damage plumes!).
- 🔋 New battery (see section above).
- 🧤 Antistatic bracelet (optional, but recommended to protect the board from statics).
If you don't have a hair dryer, you can use hot air from a household hair dryer, but be careful: don't direct the flow directly to the screen or battery - only on the edges of the case! The temperature should not exceed 60-70 ° C, otherwise you can damage the display or adhesive layers.
☑️ Preparation for battery replacement
Step-by-step instructions for replacing the battery
Now, to the process itself, follow the instructions strictly in steps so that you don't damage the plumes or the screen.
Step 1: Turn off the phone and remove the back cover
1. Turn off the Redmi Note 8 Pro completely (press the power button and select “Switch off”).
2. Remove the tray for SIM-cards by means of a paper clip or a special key.
3. heat the hair dryer edge of the back cover for 2-3 minutes, holding the hair dryer at a distance of 5-7 cm The glue will become softer, and the cover will be removed easier.
4. Put a plastic lid on the lid with a scapula or a suction cup (start at the bottom edge where the connectors are located). Be careful: under the lid are the plumes of the fingerprint scanner and antenna!
What to do if the lid does not lend itself?
Step 2: Disconnect the battery plume
1. After removing the lid, you will see the battery (large black part in the center) and the power plume (white connector with an orange tongue).
2 Carefully tuck the orange tongue of the connector with a plastic spatula and unplug the plume, which will turn off the phone and make further work safe.
3. If the battery is swelling, do not try to pull it out by force - first you need to remove the glue (see next step).
⚠️ Warning: Never use metal tools to unplug the plume! One careless movement and you can close contacts on the motherboard, which will lead to a short circuit.
Step 3: Remove the old battery
1. The battery in the Redmi Note 8 Pro is glued to the body with double-sided tape, and to remove it, you need to dissolve the glue.
- Apply isopropyl alcohol under the edges of the battery (use a syringe or pipette).
- Wait 5-10 minutes until the glue softens.
- Carefully tuck the battery with a plastic spatula, starting at the top edge (where there are no plumes).
2 If the battery fails, repeat the procedure with alcohol. Do not pull it by force - you can tear the plume or damage the body!
3. After removing the battery, clean the case of glue residues with alcohol and a napkin.
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If there is no isopropyl alcohol at hand, you can use acetone or a liquid to remove varnish, but you need to act faster - these substances are more aggressive and can damage the plastic.
Step 4: Installation of a new battery
1. Check the new battery for protective tape on the contacts. If you have one, remove it.
2. glue double-sided tape (usually bundled with battery) to the phone body. If there is no tape, use the residue of old glue or buy a new one (for example, 3M VHB).
3. Carefully set the battery in place, combining contacts with the plume. Make sure that it lies flat, without distortion.
4. Connect the power plume to the motherboard (click before clicking).
Step 5: Assembly of the phone
1. Check if all the plumes (fingerprint scanner, camera, speaker) are in place and connected.
2. Set the back cover starting at the top (where the latches are located). Press it around the perimeter so that it sits tightly.
3. Put the tray in. SIM-map.
4. Turn on the phone and check:
- 🔋 Charging is normal (indicator is burning, percentage of charge is increasing).
- 📱 The phone does not overheat in the battery area.
- 🔄 No accidental reboots or shutdowns.
1. Is the power plume connected correctly?
2. Have you damaged the fingerprint scanner plume (it goes under the battery).
3. Charge the phone 10-15 minutes - sometimes a new battery takes time to "wake up».-->
Frequent Mistakes and How to Avoid Them
Even experienced tycoons sometimes make mistakes when replacing batteries, and here are the most common mistakes and ways to prevent them:
- 🔌 Power plume damage, often occurs when the connector is unconnected neatly, so you can only use plastic blades and plug the connector on the side instead of the top.
- 🔥 Overheating of the battery or screen, if you heat one area with a hair dryer for too long, you can melt the adhesive layers or damage them. OLED-Solution: warm up in short intervals (30 seconds) and let the phone cool down.
- 🧲 Getting metal chips inside the case, it can close the contacts on the board. Solution: work on a clean surface and use a magnetic screw mat.
- 📉 Poor-quality glue: If the battery is not glued properly, it can move when vibrating (e.g., during a bell) Solution: Use the original double-sided tape or glue. B-7000.
If after replacing the battery, the phone began to discharge quickly, check:
- Is the Adaptive Battery feature included in the settings (Settings → Battery → Power Modes).
- Does not work in the background “gluttonous” application (check in Settings → Battery → Charge use).
- Is there a non-original firmware installed (it may not display the percentage of charge incorrectly).
How long will the new battery last?
Battery life depends on battery quality, operating conditions and charging mode.
- 🔋 Original battery (from Xiaomi or ATL) It will last 2-3 years (500-800 charging cycles).
- 📱 Quality analogue (for example, from Sunwoda) - 1.5-2 years (400-600 cycles).
- ⚠️ Cheap counterfeiting – from 6 months to a year (200-300 cycles).
To extend the life of the battery:
- 🔌 Avoid deep discharge (charge your phone at 10-20% charge).
- ⚡ Do not leave your phone on charge all night (optimum - up to 80-90%).
- 🌡️ Do not use your phone in extreme temperatures (below 0)°C or higher than 40°C).
- 🔄 Calibrate your battery once every 3 months: completely discharge your phone, then charge up to 100% without interruptions.
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The Redmi Note 8 Pro has Optimized Charging (Settings → Battery → Additional) on it, and it will charge up to 80% and wait for you to wake up to 100%, which reduces battery wear by 20 to 30%.