How to remove the battery from Xiaomi Redmi 7A: instructions with nuances

Xiaomi Redmi 7A

Redmi 7A

Many users are afraid to disassemble the smartphone themselves, for fear of breaking the plumes or damaging the board. Indeed, in the Redmi 7A, the battery is connected to the motherboard not only with a connector, but also with a glue base that can make it difficult to extract, but with the right approach and the availability of tools, the procedure is quite feasible at home, the main thing is to follow the instructions and take your time.

In this article, you will find a step-by-step photo guide, a list of tools you need, and safety tips, and how to check the battery status before retrieving it and what to do if the battery is swollen.

Preparing for battery recovery: safety tools and measures

Before you start disassembling the Xiaomi Redmi 7A, make sure you have everything you need. Without the right tools, you risk damaging the body, plumes, or battery itself.

• 🔧 Plastic blade or mediator - for careful liding and disconnection of plumes.
• 🔨 Cross screwdriver (size) PH00) — screw-twisting.
• 🧲 Suction - will help to lift the cover after heating.
• 🔥 Hair dryer or thermo-air station - for softening the glue (temperature not higher than 60)°C!).
• 🧴 Isopropyl alcohol (90%+) — glue-residue.
• 📦 Container for screws - so as not to lose small details.

Also, prepare the workplace: it should be clean, well-lit and without static electricity, it is advisable to use an antistatic bracelet or at least periodically touch grounded metal objects to avoid damage to the board by discharge.

⚠️ Note: If the Redmi battery 7A If you're swelling, don't try to prick it or bend it, it could cause a fire or an explosion, and then you'd better go to the service center.

Before starting work, be sure to turn off the phone and remove it. SIM-If the battery is severely drained, charge it to at least 20%, which will reduce the risk of short circuit when the connector is disconnected.

Step 1: Removing the back cover of Xiaomi Redmi 7A

The Redmi 7A's back cover is glued around the perimeter, so you can't just take it off, you need heat and you need to do it neatly. Here's how to do it.

1. Heat the edges of the cover with a hairdryer for 1-2 minutes, keeping it at a distance of 5-7 cm. Do not overheat! Temperatures above 60 ° C can damage the display or board.
2. Apply the suction cup to the bottom of the lid (near the charging connector) and pull up slightly. If the lid fails, repeat heating.
3. Insert a plastic blade into the gap and gently swipe it around the perimeter, separating the glue. Start at the bottom edge and move counterclockwise.

Be careful around the volume and power buttons, because there are plumes that can be accidentally damaged, and if the lid doesn't lend itself to some place, don't force it: you better warm up the area again.

Check the heating temperature (not higher than 60 ° C)

Use a plastic blade, not a metal blade.

Start at the bottom edge of the lid

Do not pull the lid sharply, so as not to tear the plumes.-->

Once the lid is gone, put it aside, and underneath it you'll see the battery, the motherboard, and some plumes, and don't touch the board with your bare hands, which can cause corrosion or static discharge.

Step 2: Disconnection of the plumes and battery connector

Before you take the battery out, you have to disconnect it from the board. In the Redmi 7A, the battery connector is on top of the device, next to the camera, and it's locked in with a small clip that you need to gently lift.

• 📸 Take a picture of the location of the plumes, then connect them correctly.
• 🔧 With a plastic shovel or tweezers, lift the connector clamp (it is usually black or orange in color).
• ⚡ Carefully pull the battery plume out of the connector!

Also, disconnect the fingerprint scanner plumes (if you have one in your modification) and the main display plume so that they don't interfere. Be very careful: these plumes are very fragile and easily torn.

⚠️ Warning: If the phone accidentally switches on after the battery is disconnected (for example, due to the closure of contacts), immediately turn it off with a long press on the power button!

Once all the plumes are turned off, you can start removing the battery, but first make sure that the board is free of residual charge, so you can briefly touch the metal contacts screwdriver (for example, on the charging connector). If there is no spark, you can continue.

Step 3: Removing the battery from the housing

The battery in the Redmi 7A is glued to the body with double-sided tape, which eventually becomes very sticky, and it takes patience and care to separate it.

1. Apply isopropyl alcohol to the edges of the battery, it will dissolve the glue and make it easier to separate. Don't pour too much -- just a few drops are enough.
2. Wait 1-2 minutes for the alcohol to work.
3. Put a plastic card or a shoulder blade under the battery and gently move it back and forth, separating the battery from the housing. Start at the edge where there are no plumes.
4. If the battery fails, add more alcohol and try again. Don't use metal objects, they can puncture the battery!

And you can hear the characteristic creaking sound in the process, which is normal, because the glue is going away, and the key is to take your time and not put too much effort into it, and if the battery starts to bend, stop and add the alcohol.

Once the battery has separated, don't rush to pull it out. Look for bloating, damage, or corrosion. If the battery is deformed, it can't be reused -- just recycling!

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If you're planning to install a new battery, clear the place underneath with alcohol and a napkin, and the new battery should lie flat, without any distortion.

Step 4: Checking the battery and preparing for replacement

The battery that's been removed needs to be inspected for damage, and you should note the following:

• 🔋 Bloating – if the battery is swelling (even slightly), it cannot be used. This is a sign of a malfunction that can lead to fire.
• 🔌 Contacts -- they should be clean, without oxidation or plaque, clean them with a stripe or alcohol if necessary.
• 📉 Capacity – if the battery is discharged quickly, it can be checked with a multimeter or a special tester (for example, USB-Tester).

If you find bloating, don't try to fix the battery -- it needs to be disposed of. Bloated batteries can spontaneously ignite even when they're off! For recycling, go to a hazardous waste reception center or Xiaomi service center.

If the battery is in normal condition, but you want to replace it with a new one, choose only the original battery or a certified analogue. For the Redmi 7A, a battery labeled BM47 or DM43 with a capacity of 4000 mAh is suitable.

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Never use batteries from other Xiaomi models or unknown manufacturers – this can cause incompatibility with the charging controller and damage to the phone.

Step 5: Install a new battery and build your phone

If you have replaced the battery, before installing a new one, follow the following steps:

1. Clean the place under the battery from glue residues with alcohol and a napkin.
2. Make sure that the contacts of the new battery is not protective film (if any, remove it).
3. Carefully install the battery in place, making sure that it lies flat, without distortions.
4. Connect the battery plume to the board and fix the clamp.

Then you can start to reverse assemble, make sure all the plumes are connected correctly, and the screws are twisted with the same force as when disassembling. Don't drag them - this can damage the thread!

When the phone is fully assembled, turn it on and check:

• 🔋 Charging (plug the charger and make sure it is charging).
• 📱 Performance of the sensor and display.
• 📸 Camera and fingerprint scanner (if any).

If everything is working properly, congratulations, you have successfully replaced the battery! If you have problems (for example, the phone does not turn on or charge), check the connection of the plumes and the battery connector.

Frequent Mistakes and How to Avoid Them

Even with careful disassembly, you can make mistakes that will cause your phone to break down, and here are the most common ones and ways to prevent them:

Another common problem is improper battery installation, where if the battery is lying crooked or not fully glued, it can lead to poor contact and quick discharge, and to avoid this, use double-sided tape or special battery glue (sold in radio parts stores).

If the phone doesn't turn on after assembly, don't panic.

• 🔌 Unconnected battery plume or display.
• 🔋 Battery discharge (plug in charge and wait 10-15 minutes).
• 🛠️ Damage to the fee (in this case, a diagnosis in the service will be required).

FAQ: Answers to Frequent Questions