How to carefully remove the battery from Xiaomi Redmi 7: instructions with photos and warnings

Xiaomi Redmi 7 is a popular smartphone with a non-removable battery, but sometimes users need to remove it: to replace, diagnose or repair after a fall. Unlike older phones with lids, you will have to disassemble the case here, which is fraught with the risk of damage to the plumes or display. This article will help you get it right, even if you have no experience of repair.

Important: the battery in Redmi 7 is glued to the body and connected to the motherboard in a thin plume, and errors in the extraction can lead to short circuit, damage to the power controller or even fire, and we will tell you how to minimize the risks, what tools you will need and what to do if the battery is blown up.

If you're not sure about your abilities, you'd better go to a service center, but if you're going to do it yourself, follow the instructions Step-by-step.

When should I remove the battery from the Xiaomi Redmi 7?

There are several situations where the disassembly is justified:

• 🔋 Battery bloating – the phone body is deformed, the screen “steps away” from the frame.
• 🔌 Fast discharge – the phone holds a charge less 2-3 hours under normal use.
• ⚡ No charge – cable is connected, but the charging indicator does not burn, the phone does not respond.
• 💥 Overheating - the body is very heated even without load.
• 🔧 Repairs after falling – check the integrity of board and contacts required.

If the battery is swelling, you need to remove it as quickly as possible — lithium-ion batteries in this state can spontaneously ignite. Signs of bloating: the screen is raised, the body is curved, the phone does not lie flat on the table.

In other cases, first try the software diagnostic methods:

• Check battery wear through the engineering menu (#4636## → “Battery Information”).
• Install the AccuBattery app to analyze charging cycles.
• Clean the dust charger connector with compressed air or a wooden toothpick.

⚠️ Warning: If the phone has been in water, don't disassemble it yourself! corrosion on the board can short circuit when in contact with tools.

What tools will you need?

For safe battery extraction from Xiaomi Redmi 7, prepare:

In addition, the following may be useful:

• 🧲 Magnetic mat - so as not to lose the screws.
• 🧴 Double-sided tape or glue B-7000 — installing a new battery.
• 🛡️ Protective gloves – if the battery is swollen or leaking.

Don't use metal blades or knives - they can puncture the battery! Also avoid cheap Chinese sets with fragile screwdrivers that break when loaded.

💡

Before disassembly, completely discharge the phone (before turning off) - this will reduce the risk of short circuit when the battery is disconnected.

Step-by-step: how to disassemble Xiaomi Redmi 7 and get the battery

Follow the algorithm in strict order, and if you don't get a step, don't force it, read the instructions again, or watch the video guides.

Step 1: Removing the back cover

The Redmi 7 body is glued together, so you're going to need heat.

1. Turn on the dryer at an average temperature (about 60-70°C).
2. Warm up the edges of the phone around the perimeter for 2-3 minutes, holding the hair dryer at a distance of 5-10 cm.
3. Insert a plastic blade into the gap between the case and the screen (start at the bottom edge where the charging connector is).
4. Carefully drive the blade along the body, separating the glue. If the resistance is strong, warm up more.

Don't try to pull the lid off with a jerk, because there are plumes of the fingerprint scanner and antenna underneath, and after the glue is removed, lift the lid on the side where there are no plumes (usually on top).

Step 2: Turn off the plumes

Under the lid, you'll see:

• 🔋 Battery (takes up most of the space).
• 📱 Motherboard with connected plumes.
• 📷 Camera and antenna connectors.

First, you disconnect the battery plume, which is on top of the battery, and it's locked in a black connector, and you put a plastic blade on the side (not on top!), and if you pull on the plume, you can rip off the contacts.

⚠️ Warning: If the phone has been on in the last 10 minutes, there may be voltage on the board.A touch of metal tools to the battery contacts will cause a short circuit!

Step 3: Removing the battery

The battery is glued to the body to remove it.

1. Warm up the surface of the battery with a dryer (do not overheat - the maximum temperature is 80 ° C!).
2. Put a plastic blade on the battery from any end, and if the glue doesn't work, warm it up again.
3. Carefully pull the battery up, don't rot it. If you feel resistance, check if the plumes are unconnected.

If the battery is swollen, don't prick it, it can cause fire.

• Place the phone in a sealed container (such as a jar with a lid).
• Take it to a service center or battery recycling point.

Step 4: Installation of a new battery

If you are replacing the battery, before installing the new battery:

1. Clean the landing site of the remnants of old glue with alcohol.
2. Apply the new bilateral Scotch or B-7000 glue with a thin layer.
3. Connect the new battery plume to the connector on the board.
4. Carefully press the battery, making sure it lies flat.

After assembling the phone, charge it 100% and complete 2-3 full discharge/charging cycles to calibrate the controller.

💡

Never use a battery with visible damage (swelling, cracks, corrosion marks) and even if the phone turns on, the risk of fire remains!

Frequent Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when replacing the battery.

Another common problem is that the phone doesn't turn on after assembly, and there are many reasons.

• 🔌 Not connected battery plume or display.
• 🔋 The new battery is discharged (sometimes you need to connect the charge for 10-15 minutes before the first turn on).
• 💥 Damaged board (check for blackened elements or the smell of burning).

If the phone turns on after the battery is replaced but discharges quickly, there may be a problem with the power controller on the motherboard, in which case a diagnosis will be required in the service.

How do I check a new battery?

After replacing the battery, it is important to make sure it is working properly.

1. Charging check: Connect the original charger. Make sure the charging indicator is on and the status bar displays a zipper icon. Set charging time from 0% to 100% - the Redmi 7 is 2-2.5 hours normal.
2. Autonomous test: Charge your phone to 100% and turn off charging. Use your phone as normal (calls, messengers, internet) normal consumption of 5-8% per hour; if more, the battery is defective or uncalibrated.

Diagnostics through the engineering menu:

• Enter the code ##4636##.
• Go to "Battery Information".
• Check the parameters of the charge level, voltage (normal 3.7-4.2V) and temperature (not higher than 40 ° C when charging).

If the parameters go beyond normal, the battery may be defective or damaged during installation, in which case return it to the seller (if there is a warranty) or replace it with another.

💡

For accurate diagnosis, install the CPU-Z app (Battery section) to show the actual battery capacity, number of charging cycles, and health status (Health).

Where to buy a high-quality battery for Xiaomi Redmi 7?

The quality of the battery is not only dependent on autonomy, but also on safety.

• 🛒 Xiaomi’s official service centers are original batteries with warranty, but more expensive (1500-2500) ₽).
• 🔧 Service centers – some sell batteries separately (ask for “contract” or “contract” batteries «OEM»).

When choosing, pay attention to:

• Capacity - the original battery for the Redmi 7 has a capacity of 4000 mAh.

Avoid batteries that say "Premium," "Ultra Capacity," or "5000 mAh" are fakes with low real capacity, and don't buy batteries that are sold without protective film or with damaged contacts.

⚠️ Warning: If you buy a battery on AliExpress, order it in advance — it can take up to a month to deliver!

What do you do with the old battery?

Lithium-ion batteries can't be thrown away in the trash -- they contain toxic substances and can spontaneously ignite.

• 🔄 Battery reception points – they are accepted in electronics stores (M. Video, Eldorado), at gas stations or in eco-parks.

Before disposal:

1. Deplete the battery (if it is still working).
2. Wrap it in thick paper or polyethylene.
3. Do not store at home – if the battery is swollen, it can ignite.

If the battery is damaged (piercing, leaking), don't touch it with your bare hands - the electrolyte can cause chemical burns. Place it in a sealed container and take it to the disposal point as soon as possible.

FAQ: Answers to Frequent Questions