How to properly remove the battery from Xiaomi Redmi 8: detailed instructions with a photo

Xiaomi Redmi 8 is equipped with a non-removable battery, but sometimes owners have to remove it to replace, diagnose or repair other components. Unlike older phones with a lid, it will require disassembling the case, which can risk damaging the plumes or display. This article will help avoid mistakes: we will analyze the necessary tools, step-by-step process and key nuances that are not written in the standard instructions.

Many users are afraid to disassemble the Redmi 8 for fear of losing the warranty or breaking the device. Indeed, improper battery extraction can lead to short circuit, damage to the motherboard or even fire. However, with a competent approach and compliance with safety precautions, the procedure is quite feasible at home.

In this article you will find not only standard instructions, but also hidden life hacks (for example, how to disconnect the glued battery without a special device), as well as answers to frequent questions: what to do if the battery is swollen, how to check its condition after extraction and when it is better to contact the service center.

Why do you need to remove the battery from the Redmi 8?

The battery in Xiaomi Redmi 8 is designed for 500-800 charge cycles, but over time its capacity inevitably decreases.

• 🔋 Replacement with a new battery – if the phone is rapidly discharged (less than 4-5 hours of active use) or suddenly shuts down at 20-30% charge.
• 🔥 Battery bloating – the phone’s body begins to “bloat”, the screen rises, or there are gaps between parts.
• 🛠️ Repair of other components – for example, replacing the display, speaker or power plume to which the battery is attached.
• 🔍 Diagnostics of malfunctions – if the phone doesn’t turn on, charge or overheat, checking the battery can reveal the cause.

It is important to understand that a bloated battery is not just an inconvenience, but a real danger. Lithium-ion batteries can ignite or explode if damaged. If you notice that the Redmi 8 body has deformed, do not try to charge the device and immediately remove the battery (or take the phone to the service).

Another common cause is charging error (e.g., the phone shows 0% charge, but it doesn't even turn on from the mains). In 30% of these cases, it's the battery that's the fault, and replacing it solves the problem. However, before removing it, it's worth checking the charger and cable, and sometimes the problem lies in them.

Preparation: security tools and measures

Before you start disassembling the Xiaomi Redmi 8, make sure you have everything you need.

• 🔧 Plastic blades (mediators) - for careful smearing of the body and disconnection of plumes.
• ⚡ Screwdriver cross (PH00) — back-cover.
• 🧲 Magnetic mat or container – to avoid losing small details.
• 🔥 Gloves and safety glasses - when working with a bloated battery.
• 📱 Hair dryer or thermo-air station - for softening the glue (optional).

If the battery isn't swollen, you can do without a hair dryer, but a glued battery (and that's what it is in Redmi 8) is difficult to remove without heating. The alternative is a special battery suction cup or a thin guitar string, but it takes experience.

⚠️ Warning: Never use metal tools (knives, screwdrivers) to smack the battery! The risk of piercing it and triggering fire is extremely high. Plastic blades or mediators are the only safe option.

Also prepare the workplace:

1. Work on a clean, flat surface without carpets (so you don’t lose your screws).
2. Turn off the phone and remove it. SIM-memory-card.
3. If the battery is swollen, disassemble the phone outdoors or near a window - if damaged, it can release toxic gases.

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Before disassembling, take a photo of each stage on a different phone – this will help to properly assemble the Redmi 8 back, especially if you’re doing a repair for the first time.

Step-by-step: how to disassemble Xiaomi Redmi 8 and get the battery

The process of removing the battery consists of several steps. Follow the instructions strictly in order to avoid damage.

Step 1: Removing the back cover

1. Turn off the phone and put it down with the screen.
2. Heat the back cover with a hair dryer (a temperature of ~60°C) for 2-3 minutes to soften the glue.
3. Insert a plastic blade into the gap between the lid and the body (start at the bottom edge where the connectors are located).
4. Carefully swipe the perimeter, separating the lid. Be careful - there are plumes under it!

Step 2: Disconnect the battery plume

• After removing the lid, you will see a battery with a black connector (it is located closer to the bottom of the phone).
• Carefully put a plastic spatula on the jack and unplug it from the motherboard.
• If the plume does not lend itself, check whether there is a retainer on it (sometimes you need to slightly lift the latch).

Step 3: Removing the battery

The battery in Redmi 8 is glued to the body to remove it.

1. Put a plastic shoulder blade on the battery from any edge and try to lift it.
2. If the glue is too strong, heat the battery with a hairdryer (not higher than 70 ° C!) and try again.
3. Do not use force – it is better to slowly “cut” the glue with a guitar string (if any), leading it under the battery.
4. After removal, inspect the battery for swelling or damage, and if it is deformed, do not try to recharge or reuse it.

Phone's off and cooled.|SIM-map and memory card retrieved|Tools prepared (scapula, screwdriver)|The workplace is lit and free from debris|Photo of each step taken (optional)-->

Step 4: Installation of a new battery

If you are replacing the battery:

1. Make sure the new battery is compatible with the Redmi 8 (the original is labeled BM47 or BM48).
2. Remove the protective film with the base adhesive (if any) and carefully install the battery in place.
3. Connect the plume to the motherboard and fix it.
4. Before assembling the phone, check if it is powered on from the charger.

⚠️ Note: After replacing the battery, the Xiaomi Redmi 8 may show an incorrect charge level in the first 2-3 charge/discharge cycles. This is normal - the system needs time to calibrate. If the problem persists longer, check the density of the plume or update the firmware.

Frequent Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when retrieving the battery, and here are the most common ones and ways to prevent them:

Another common problem is that the adhesive damage to the base under the battery, if you plan to reset the battery, save the old glue or buy a new two-way battery tape (e.g., 3M 9448A), will dangle inside the battery, which can cause the plume to break.

If the phone does not turn on after replacing the battery, check:

• The density of the plume adjacent to the connector on the motherboard.
• Integrity of contacts (sometimes they are oxidized - clean with alcohol).
• The power of the charger (try another one).

How to check the status of the battery after removal

If you have removed the battery from Redmi 8 for diagnostics, it is important to properly assess its condition.

• 🔍 External inspection: Bloating (even a mild one) is a sign of failure; dark spots or white plaque are electrolyte leaks; shell damage (cracks, punctures) - battery to be disposed of.
• 📊 Multimeter test: The voltage of the serviceable Redmi 8 battery is 3.7-4.2 V. If the voltage is below 3.0 V, the battery is deeply discharged and may not recover. If the multimeter shows 0 V, the internal circuit is.

For accurate diagnostics, you can use applications like AccuBattery (if the phone is still turning on), which will show the actual capacity of the battery and the degree of wear and tear, for example, if the original capacity of Redmi is 8 - 5000 mAh, and the application shows 3000-3500 mAh, it is time to change the battery.

If the battery is blown up but looks good, don't try to charge it. Lithium-ion batteries are unstable and can explode. The best option is to dispose of it at a special reception point (many electronics stores have battery bins).

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Even if the battery looks normal on the outside, but the phone quickly discharges or turns off at 20 to 30 percent charge, the problem is likely to be the battery, and replacing it with a new one will solve the problem 90 percent of the time.

When is the best time to contact the service center

While you can replace the battery in Xiaomi Redmi 8 on your own, in some cases it is better to trust the professionals.

• 🛠️ You’ve never taken your smartphone apart and are afraid of damaging the fee.
• 🔥 Battery is heavily swollen or deformed (risk of electrolyte leakage).
• 🔌 After replacing the battery, the phone does not turn on or charge.
• 📱 Not only the battery but also other components (e.g., power plume) must be replaced).

The cost of replacing a battery in a Xiaomi service center or third-party workshop is usually 1500-3000 rubles (depending on the region and type of battery), which is not so expensive if you consider the risks of self-repair, and the service often gives a warranty for work (from 1 to 6 months).

If you decide to repair the phone yourself, but something went wrong (for example, after the assembly does not work touchscreen or camera), do not try to fix further - consult a specialist. Often "home" errors are more expensive than the original repair.

How to extend the life of a new battery in Redmi 8

After replacing the battery, you want it to last as long as possible.

• 🔋 Avoid deep discharge – try to charge your phone when the charge drops to 10-20%.
• ⚡ Do not keep on charging constantly – after reaching 100%, turn off the cable.
• 🌡️ Watch the temperature – do not leave your phone in the sun or near heaters.
• 📵 Use the original RAM – cheap charging can damage the power controller.

It is also useful to calibrate the new battery:

1. Charge your phone to 100% and hold on charging for another 1-2 hours.
2. Discharge until it's automatically turned off.
3. Repeat the cycle 2-3 times, which will help the system to correctly determine the level of charge.

If you notice that a new battery is fast-setting, check which apps are consuming. In Redmi 8, go to Settings → Battery → Battery Use. Often messengers, games or background processes are to blame.

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In Redmi 8 settings, turn on Battery Savings (in Battery) mode, which will limit background activity and increase your running time by 10-15%.

FAQ: Frequent questions about battery replacement in Xiaomi Redmi 8