Xiaomi Redmi 8 Pro is a popular smartphone with a non-removable battery that may need to be replaced over time, but the process of removing it requires caution: the wrong actions lead to damage to the plumes, battery rupture or even fire. In this article, we will discuss the step-by-step algorithm, necessary tools and key nuances that will help to avoid errors.
It's important to understand that the Redmi 8 Pro (codenamed olivewood) has a glue battery soldered to the motherboard, which makes it harder to dismantle compared to the removable models. If you've never disassembled a smartphone, you'd better go to a service center, but if you decide to act on your own, follow our recommendations.
Preparation: security tools and measures
Before disassembling, collect everything you need, and the absence of at least one tool can lead to permanent damage.
- 🔧 Plastic mediators (2-3 (a) - for separation of the back cover and the battery.
- 🔥 Dryer or thermo-air station - heating to 60-80°C softens the glue.
- 🔩 Screwdriver. T3 and T5 — lid-pin.
- 🧲 Suction - helps to lid the lid after heating.
- 🧴 Isopropyl alcohol (90%+) — glue-residue.
- 🛡️ Gloves and safety glasses – battery can leak or ignite.
Also, prepare the workplace: the desk should be clean, without metal objects (the risk of short circuit); Never take your smartphone apart on a sofa or carpet - static electricity can damage the board; use an antistatic mat or at least put your phone on a wooden surface.
⚠️ Warning: If the battery is swelling (phone cover is raised), do not heat it - risk of explosion.
Step 1: Removing the back cover
The Redmi 8 Pro's back panel is glued around the perimeter to remove it.
- Turn off the phone and remove it. SIM-map.
- Heat the hair dryer of the edge of the cover (30 seconds on each side) at a distance of 5-7 cm.
- Put the cover on a plastic mediator at the USB-C connector (there is weaker glue).
- Carefully drive the mediator along the body, separating the latches.
If the lid doesn't lend itself, reheat the problem area. Don't use metal tools, they leave scratches and can close contacts. After removing the lid, put it aside: it's fragile and can crack if handled carelessly.
Is the phone off the grid?
Whether extracted SIM-memory-card?
Are plastic mediators and suction cups ready?
Do you heat the lid evenly, without overheating?
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Step 2: Disconnect the plumes and batteries
When you take the lid off, you'll see the battery covered with black film, but before you touch it, you'll need to turn off all the plumes.
- Unscrew 4 T3 screws, fixing the metal plate over the plumes.
- Carefully tuck the plumes of the display, camera and touch panel with a plastic spatula.
- Disconnect the battery connector (usually marked in red or orange).
If you don't turn off the battery, if you accidentally close the contacts, the power controller can burn down. The plumes are very fragile - pull them only by the plastic tongues, not by the wires!
| schleife | Location. | Risk of damage |
|---|---|---|
| Battery | Top of the board, red connector | Short circuit, failure of the power controller |
| display | The board center, wide plume | White screen, artifacts, lack of image |
| Cameras | Top left corner of the board | The main/front camera is not working. |
| Touch panel | Under the display plume | He doesn't respond to touch. |
Step 3: Removing the battery
The battery in the Redmi 8 Pro is glued to the body with double-sided tape and additionally fixed with glue at the edges.
- Put the battery with a plastic spatula from any corner (preferably from where there are no plumes).
- If it doesn't lend itself, drop the isopropyl alcohol under the edge - it will dissolve the glue.
- Carefully drive the blade along the battery, separating it from the body.
- Don’t pull the wires – they can break away from the charge!
If the battery is swelling, be very careful not to pierce it or bend it. Bloated batteries contain gases under pressure and can ignite. Ideally, these batteries are removed in gloves and safety glasses, having previously placed the phone in a refractory container.
What to do if the battery is too tight?
⚠️ Warning: If the battery starts to smoke or heat up during the extraction, immediately place it on a non-combustible surface (such as ceramic tiles) and leave the room. It is useless to extinguish lithium batteries with water - use sand or a class D fire extinguisher.
Common Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when working with the Redmi 8 Pro.
- 🔌 Forgetting to turn off the battery before work → short-circuit.
- 🔨 They use metal tools. → scratches on the board, closing contacts.
- 🔥 Dryer overheats the battery → ignition.
- 💧 Liquor on the charge → contact-corrosion.
- 🔄 Bending plumes when assembled → cliff.
To minimize the risks, follow the rule: "If you're not sure, don't press." Better to heat the glue or drip alcohol again than break the plume or break the battery. Remember, Xiaomi does not provide official spare parts for self-repair - all parts will have to order from third parties.
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If there is trace of glue on the board after removing the battery, remove it with a wooden toothpick dipped in isopropyl alcohol. Do not use cotton cotton cotton or cloth - the villi may remain on the contacts.
How to replace the battery: original vs analogues
The original battery for the Redmi 8 Pro is BM47 and has a capacity of 4000 mAh. However, Xiaomi does not sell them retailly - only through authorized service centers.
| Type | Advantages | Deficiencies | Price (roughly) |
|---|---|---|---|
| Original (b/u) | Guaranteed compatibility, long service life | Hard to find, can be worn out | 1500–2500 ₽ |
| Analogue (e.g. Patona) | Availability, low price | Less resource, possible calibration problems | 800–1200 ₽ |
| Increased capacity (5000 mAh) | More time to work | Maybe not fit into the body, quick wear. | 1800–2200 ₽ |
When buying an analogue, check:
- 📏 The sizes must match the original (150.5 × 70.5 × 3.8 mm).
- 🔌 The connector - must approach the board without alterations.
- 🔋 The tension is just 3.85V (For the Redmi 8 Pro).
After installing the new battery, be sure to calibrate:
- Charge your phone to 100% and keep it on charge for 2 hours.
- Turn off and discharge until automatically turned off.
- Repeat the cycle 2-3 times.
Building a phone: the reverse order of action
To assemble Redmi 8 Pro need in reverse order, but taking into account the nuances:
- Make sure that all the plumes are connected to the end (the click should be heard).
- Make sure the screws are twisted into the same holes – they are of different lengths!
- Stick the back cover to a new double-sided scotch (the old one has lost adhesiveness).
- Heat the lid with a hair dryer before the final fixation (it will sit tighter).
After assembly, turn on the phone and check:
- 📱 Does the sensor work (no dead zones").
- 📸 Are the cameras (front and main) functional).
- 🔊 Is there sound in the speakers and microphone.
- 🔋 Is the battery charge correctly determined (no percentage jumps).
⚠️ Warning: If the phone doesn't turn on after assembly, check: Is the power plume connected to the board? Is the contacts on the battery closed (call the multimeter) Are the screws mixed up (long screws can break the board).
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If the phone discharges quickly after replacing the battery, the cause may be a poor battery or improper calibration. Try repeating the charging-discharge cycle or checking the consumption current in standby mode (should be no more than 50–100 mA).