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

Removing the battery from the Xiaomi Redmi smartphone is a challenge that owners face when replacing the battery, repairing after a fall or getting moisture. Unlike older phones with removable covers, modern Redmi models (including the Note series, 9/10/11, A, etc.) have a non-shattered body, where the battery is glued to the rear panel, which complicates the process, but does not make it impossible for a user with minimal skills.

It’s important to understand that improper battery extraction can cause plumes to break, contacts to break, or even fire (in the case of a lithium-polymer cell puncture). In this article, we’ll take a step-by-step approach to Redmi models with their designs in mind, list the tools you need and warn you of common mistakes. If you’ve never taken your smartphone apart, you’d better go to a service center.

Which Xiaomi Redmi models have a non-removable battery?

The vast majority of Xiaomi Redmi smartphones released after 2016 have built-in batteries, meaning that the battery is not just inserted into the compartment, but glued to the body with double-sided tape or special glue. Here are the key series and models that will require disassembly of the case to be removed:

• 📱 Redmi Note (all generations) Note 4/5/6/7/8/9/10/11/12)
• 📱 Redmi 9/9A/9C/9T and their modifications (9 Pro/9 Power)
• 📱 Redmi 10/10A/10C/10 Prime and others.
• 📱 Redmi K20/K30/K40/K50 (The K series is often confused with POCO, But it's also true of Redmi)
• 📱 Redmi A1/A2 (Budget models with simplified design)

The exception is rare models from the early 2010s (like the Redmi 1S or Redmi 2), where the back cover was removed without tools, and if you have one, the battery can be removed by slapping it with a nail or plastic card after the lid is removed.

Preparation: security tools and measures

Before you start disassembling, make sure you have everything you need, and even one tool that is missing can damage the body or internal components.

• 🔧 Plastic mediators (2-3 (a) - for the separation of the back cover.
• 🔧 Suction (optional) - helps to lift the cover after heating.
• 🔧 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C).
• 🔧 Thin screwdriver (cross or Torx) T3/T4) — screw-off.
• 🔧 Tweezers - to detach the plumes.
• 🔧 Alcohol or isopropyl alcohol - to remove glue residues.
• 🔧 Gloves (recommended) – protection against static electricity.

Also, prepare your workspace: a clean desk with good lighting, no carpets or fabrics that can electrify. If you work with Redmi K-series or flagships (like Redmi K50 Gaming), note that there may be an additional heat-dissipating film there — you need to take it off carefully so as not to break.

⚠️ Warning: Never use metal tools (knives, screwdrivers) to separate the lid - they can puncture the battery or damage antenna lines. Plastic mediators are sold in phone repair kits (cost 100-300 rubles).

Turn off the phone and remove it. SIM-map|Charge the battery to 30-50% (not fully!)|Prepare tools and the workplace|Take a picture of the location of the screws before unscrewing|Wear gloves (optional)

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Step-by-step: how to remove the back cover

The first and most important step is to separate the back, and in Redmi models, it's glued around the perimeter, and in some cases, like the Redmi Note 10 Pro, it's also latched.

1. Turn off your smartphone and wait until it's completely cooled (if it's warmed up). SIM-map.
2. Heat the edges of the body with a hair dryer for 1-2 minutes. Keep the hair dryer at a distance of 5-7 cm, evenly driving around the perimeter. Do not overheat one place for longer than 10 seconds - this can damage the display or battery.
3. Insert the mediator into the gap between the lid and the frame (start at the bottom edge where the USB-C connector is located). Carefully drive the tool along the case, separating the glue.
4. Lift the lid after the mediator has passed around the perimeter, and if the lid doesn't respond, reheat the problem areas.

In Redmi 9/10 models, the lid can be attached with additional clips near the volume buttons. If you hear resistance, don't force it, but check if all latches are snapped. The video below shows the process for the Redmi Note 8 Pro (similar to most models):

When you remove the lid, you'll see the battery covered with black film, and don't pull it, it's a heat-dissipating layer, not a battery protection layer, and underneath the film are the connectors of the plumes (display, cameras, buttons) that you need to detach before you disassemble.

Disconnection of plumes and access to the battery

Before you touch the battery, you need to disconnect all the plumes that go from the motherboard to the lid, which will prevent short circuits. In Redmi models, the following connectors are usually found:

Pay special attention to the battery connector. In some models (for example, the Redmi Note 9 Pro), it is hidden under a metal plate - it needs to be unscrewed with a Torx T3 screwdriver. Once the battery plume is disconnected, the smartphone will completely turn off, and the risk of damage will be minimized.

⚠️ Warning: If you see traces of oxidation or green plaque on the contacts when you disconnect the plume, this is a sign of moisture getting in, in which case you need to dry the board in rice or silica gel for at least 24 hours before replacing the battery.

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If the plume doesn't detach, don't pull it by force. First, check if there's a latch that's not open, sometimes transparent, and not visible. In Redmi K-series models, connectors are often soldered, and can only be detached with a soldering iron.

Removal of the battery: technique and risks

The battery in Xiaomi Redmi is glued to the body with double-sided tape or special glue. To remove it, you will need:

1. Fill the battery with a plastic mediator from any angle.
2. Pull on special ears (if any) in Redmi Note 10 and later, black tapes are often pasted under the battery — pull on them.
3. Apply isopropyl alcohol (if the glue is too strong). Apply a few drops under the battery and wait 1-2 minutes - the glue will soften.

If the battery fails, don't put too much effort into it, it may have unconnected plumes (like a proximity sensor) that will break when you move abruptly, and at worst, it will result in loss of sensor functionality (auto-brightness, gestures, etc.).

In Redmi K40/K50 models, the battery is often split into two parts (a dual battery), in which case, remove the cells in turn, starting from the one closest to the edge of the case. After removing, inspect the battery for bloating. If it is deformed (convex, with cracks), do not try to puncture or bend it, this can cause fire.

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If the battery is swelling, you can't throw it in the trash, and you can take it to a battery reception center or a service center, because lithium polymer cells need special disposal.

Frequent Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when disassembling Xiaomi Redmi, here are the most common mistakes and ways to prevent them:

• 🔥 Overheating the body with a hairdryer leads to detachment of the display or damage to the board. Solution: heat no longer than 2 minutes, temperature no higher than 80°C.
• 🔧 Loss of screws - Redmi uses screws of different lengths. Solution: put them in order or photograph the location.
• ⚡ Short circuit when touching the board without the battery disconnected. Solution: always turn off the battery first.
• 📱 Damage to the display plume, which is fragile and breaks when it's not properly extracted. Solution: unscrew the locking plate before disconnecting.

Another common problem is that the antenna lines are damaged (thin copper tracks at the edges of the case) and they're responsible for communication (4G, Wi-Fi, Bluetooth), and if the phone stopped catching the network after assembly, you probably hit those lines with a mediator, and then you'll need to repair them with conductive glue.

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

• Is the battery plume connected to the motherboard?
• Are there any other garbage or screws left under the charge?
• Is the charging connector damaged (check if the indicator is on when the cable is connected).

Installation of a new battery and assembly

Before installing a new battery, clean the case of residues of old glue with alcohol. The new battery must be original or from a proven manufacturer (for example, Patona, Baseus). Cheap analogues may not match the declared capacity or swell in a few months.

Installation algorithm:

1. Stick bilateral tape (comes complete with battery) on the case.
2. Carefully put the battery, combining contacts with the connector on the board.
3. Connect the battery plume to the motherboard.
4. Make sure no wires are clamped and lock the battery to pressure (e.g., put a book on top for 5 minutes).

After assembly of the case, turn on the phone and check:

• 🔋 Charging (connect the cable and make sure that charging is underway).
• 📶 Contact (call, check the mobile Internet).
• 🎵 Speakers and microphone (record voice message).
• 📸 Cameras (take a test shot).

⚠️ Warning: If the phone discharges quickly after battery replacement, check if the Adaptive Battery function is enabled in the settings (Settings) → Battery. → Power modes. Also update the software in new versions. MIUI Optimized energy consumption.

FAQ: Answers to Frequent Questions