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

Xiaomi Redmi 7A is one of the most popular budget smartphones of the brand, but even it may eventually need to replace the battery. Unlike the flagship models with non-removable batteries, the Redmi 7A battery is theoretically removable, but the process of removing it requires caution. This article will help you understand how to remove the battery without risking damage to the board, plumes or body.

It's important to understand that even though the Redmi 7A's back cover is mounted on the latches, removing it without special tools can cause cracks or chips, and that the battery in this model is glued to the body — you can't just pull it out like you would in old push-button phones. We'll go into detail about each step, warn you of common mistakes, and give you tips on how to choose a replacement.

If you've never taken a smartphone apart before, we recommend that you first get to know the general theory of how modern batteries work, why they can't bend or pierce, and what tools are really needed, which will save you time and nerves.

Preparing for battery removal: tools and safety measures

Before you start disassembling the Xiaomi Redmi 7A, make sure you have everything you need. Lacking at least one tool can make the process impossible or dangerous.

Here is the minimum set that will be required:

• 🔧 Plastic blade (mediator) - to gently slap the lid and unplug the plumes. Metal tools can scratch the body or damage the contacts.
• 🔨 A cross screwdriver (PH00 or PH0) is for screw twisting. Size matters: too big a screwdriver will rip the slivers off.
• 🧲 Magnetic mat or container -- so you don't lose any small screws. Redmi 7A has 8 screws, but they're all different sizes.
• 🔥 A hair dryer or thermoplatform is for softening the glue under the battery, and a household hair dryer at a minimum power (not higher than 60°C) is suitable.
• 🧴 Isopropyl alcohol (90%+) — acetone or solvents should not be used!
• 🔋 New battery -- if you're planning a replacement, check compatibility. The original battery for the Redmi 7A is labeled BM47 and has a capacity of 4,000 mAh.

Also, prepare your workspace, which should be well lit, clean and without static electricity, and an antistatic mat table is perfect, and if you don't have one, at least touch a grounded metal object (like a heating battery) before you start working, it will take the static charge off your hands.

⚠️ Warning: Never disassemble your smartphone on a carpet or couch - static electricity can damage the motherboard. Also avoid working in wet spaces (such as a bathroom): even a drop of water trapped on the battery contacts can cause a short circuit.

Step 1: Turn off and discharging the smartphone

The first and most important step is to shut down the power completely, and even if the battery is almost dead, the voltage may be enough to short-circuit the contacts by accident.

How to turn off Redmi 7A before disassembling:

1. Press the power button for 3-5 seconds until the off menu appears.
2. Select "Switch off" and wait for the screen to be completely turned off.
3. Wait another 1-2 minutes - this is the time necessary to discharge the capacitors on the board.

If your smartphone doesn't respond to the power button (for example, because of a bloated battery), try a forced reboot: press the power button + increase the volume for 10-15 seconds. If this does not help, you will have to disassemble the device with the battery connected - but this is extremely undesirable.

It's also recommended that you discharge the battery to 20 to 30 percent before you take it out, which will reduce the risk of fire if you accidentally damage it, and if you've already bloated, you don't have to follow that rule, so you can get it out as quickly as possible.

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If the battery is swelling, don't try to puncture it or squeeze it! It could cause an explosion.

Step 2: Removal of the back cover

The Redmi 7A's back cover is mounted on plastic latches and a thin layer of glue, and the first mistake newcomers make is to try to smack it with a knife or a metal screwdriver, which almost always ends up with chips or cracks.

Step-by-step:

1. Place the smartphone down on a soft surface (such as a napkin).
2. Heat the edge of the lid with a hair dryer for 1-2 minutes. This will soften the glue. Keep the hair dryer at a distance of 10-15 cm so that the plastic does not overheat.
3. Insert a plastic blade into the gap between the lid and the body at the headphone jack (top left corner). Carefully move the shoulder blade along the edge, alternately snapping the clamps.
4. As soon as the lid begins to succumb, do not pull it sharply - raise it by 1-2 mm and walk again with a spatula around the perimeter.

Typical problems and solutions:

• 🔧 The lid does not lend itself in one of the corners → warm up this area with a hairdryer again and try again.
• 🔧 You hear a crunch or a crack → immediately stop and check if the plastic is breaking. You may have missed the latch.
• 🔧 The lid has been raised, but it is not completely removed → most likely, the fingerprint scanner plume (if any) has remained unclicked.

When you remove the lid, put it aside, be careful, it has a fingerprint scanner plume attached to it (if you have one in your model), and don't pull the plume or bend it!

Make sure all latches are snapped | Check the integrity of the fingerprint scanner plume |Put the lid on a safe place |Consider the battery for bloating or damage-->

Step 3: Disconnecting plumes and screws

Under the lid, you'll see a battery, a motherboard, and a few plumes. First rule: never pull the plumes! They need to be carefully disconnected with a spatula or tweezers.

Procedure:

1. Unscrew all the screws that hold the metal plate over the battery. Redmi 7A usually has 8 of them. Remember the location of each screw - they can vary in length!
2. Take the metal plate off. Under it, you'll see plumes going to the motherboard.
3. Carefully tuck in the black battery plume connector (usually signed BATTERY or BATT) and unplug it. Use a plastic shoulder blade to keep the contacts intact.
4. Disconnect the other plumes (display, cameras, buttons) if they interfere with battery access. In Redmi 7A, it is usually enough to turn off only the battery.

Notice the color labeling of the plumes, for example, the battery plume is often black or red, and the display plume is white or gray, which will help you not confuse them when you build them back.

⚠️ Warning: If you accidentally touch a metal screwdriver on the motherboard, it could cause a short circuit. In this case, before further disassembly, be sure to check the board for blackened or melted elements. If any, the smartphone can not be turned on before repair.

Step 4: Removing the battery

Now the most critical thing is to take the battery off, and the Redmi 7A uses double-sided tape or glue, which gets very sticky over time, and the wrong actions can cause the battery to rupture or damage to the board.

Step-by-step:

1. Warm up the battery with a hair dryer (temperature no higher than 60°C) for 2-3 minutes. This will soften the glue.
2. Put a plastic blade on the battery from any angle. Don't use metal tools! If the battery doesn't respond, warm it up again.
3. Once you have a crack, slowly pull the battery up while you put the glue on the shoulder blade. Don't put too much effort into it, it's better to heat it up and jeer it a little bit.
4. If the battery begins to bend or deform, stop pulling and warm up the problem area again.

What to do if the battery is swelling:

• 🔋 Don't try to squeeze or puncture it! Bloating means that gases have accumulated inside, and any puncture can cause a fire.
• 🔋 Work in a ventilated room – if damaged, the battery can release toxic fumes.
• 🔋 Use protective gloves — electrolyte from damaged battery corrodes the skin.

In the Redmi 7A, the battery is glued particularly strongly in the area near the charging socket. If you feel resistance there, warm up the area longer (up to 4-5 minutes) and use more isopropyl alcohol to dissolve the glue.

Step 5: Installation of a new battery

If you have removed the battery for replacement, installing a new one requires no less care. The new battery should be fully compatible with the Redmi 7A - check the marking (BM47) and capacity (4000 mAh).

How to correctly establish:

1. Remove the remnants of old glue from the body with isopropyl alcohol and a lilac-free wipe.
2. Apply a new double-sided tape (usually bundled with a battery) or a thin layer of special B-7000 adhesive.
3. Carefully put the battery in place, combining the contacts with the connector on the board. Don't press the battery! - it should lie down without effort.
4. Connect the battery plume to the motherboard, make sure the connector is snapped to the end.

After installation, check:

• 🔋 The plume is not bent - it should lie loose, without tension.

Before assembling a smartphone, check the performance of the new battery:

1. Connect the charger (without the cover!).
2. Make sure that the charging indication appears on the screen (if the display is connected).
3. Measure the voltage at the contacts of the battery multimeter - it should be in the range of 3.7-4.2 V.

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Never turn on a smartphone with the battery turned off! This can cause a reset or damage to the firmware. Always plug the battery in first, and then try to turn the device on.

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when replacing the battery in the Redmi 7A. Here are the most common ones and ways to prevent them:

Another common problem is that the smartphone doesn't turn on after the battery is replaced, and the reasons may be as follows:

• 🔌 Unconnected battery plume → check if the connector is tightly inserted.
• 🔌 Short circuit on the board → inspect the motherboard for blackened elements.
• 🔌 Faulty new battery → check voltage with multimeter.
• 🔌 Reset settings due to power outage → try going to Fastboot mode (Power button + volume down).

If the battery is quickly discharged or heated after replacement, it is likely that the problem is a poor battery or improper installation, in which case it is better to return the old battery (if it is still working) and order the original replacement.

FAQ: Frequent questions about battery replacement in Redmi 7A