How to remove the battery Xiaomi Redmi Note 7: the full guide

Smartphones Redmi Note series from Xiaomi deservedly considered one of the most reliable devices on the market, but even the highest quality equipment over time requires maintenance. Most often, owners are faced with the need to replace the battery, which by the time of the release of the Redmi Note 7 model has already ceased to hold charge or swelled. The process of extracting the battery in modern monolithic cases is much more difficult than in older models with removable covers, and requires some preparation, accuracy and understanding of the design of the device.

In this article, we will discuss in detail how to remove the Xiaomi Redmi Note 7 battery without damaging the plumes, display or the body itself. It is important to understand that any disassembly of the gadget is fraught with risks, and inept actions can lead to the final failure of the device. If you have never done electronics repair, carefully study the theoretical part, prepare the necessary tool and evaluate your strength before you start practical actions.

Special attention should be paid to safety, as lithium polymer batteries can be dangerous if mishandled. If the battery case is damaged by a needle or knife, the electrolyte instantly ignites, which can cause burns or fire. So follow the instructions strictly, use only good tools and do not ignore warnings about heating and deformation of the cells.

Tools and workplace preparation required

A good repair starts with the right organization of the space. You need a clean, well-lit surface, preferably an antistatic mat, although for a home craftsman, a regular table with white cloth, on which small screws are clearly visible, will be suitable. The toolkit should be complete, since the use of inappropriate items such as kitchen knives or thick screwdrivers is almost guaranteed to damage the body or internal components.

To successfully dismantle the battery in the Redmi Note 7, you will need the following tools:

• 🔥 A hair dryer or thermotable to heat the back cover (temperature near the back cover) 80-90 degree).
• 🔧 Set of screwdrivers (cross-haired) P2 or P00 hull-rotor).
• 💳 Plastic card or mediator for uncoupling the lid.
• 🧲 Magnetic mat or screw sorting tray.
• 🔋 New battery (model) BM4B) glue B-7000 double-scotch.

And don't forget the suction cup, which will help you gently lift the back panel after heating. Some craftsmen use special adhesive solvents, but in the case of Xiaomi, it's often enough to warm up well enough. Make sure that all the tools are on hand so you don't get distracted while you're working, when your hands can be busy holding on fragile parts.

Primary disassembly and removal of the back cover

The first step in any disassembly of a smartphone with a non-removable battery is to dismantle the back panel. In the Redmi Note 7 model, it is made of glass and glued around the perimeter with a special adhesive compound. SIM-To avoid pressure on the internal mechanisms when expanding materials, also be sure to turn off the device even if it is discharged to minimize the risk of short circuit.

Heat the back cover evenly, driving a hair dryer around the perimeter of the device for 2-3 minutes. Do not hold the hair dryer at one point for too long, so as not to overheat the display matrix or the battery itself. Once the glass is warm to the touch, gently apply a suction cup at the bottom and try to create a vacuum, while inserting a mediator or plastic card into the resulting gap.

⚠️ Warning: Do not try to cover the metal tools immediately after heating. The glass is very fragile and can burst from point pressure, breaking into small fragments.

Move the tool around the perimeter, gradually cutting the adhesive layer. Exercise special care in the corners and in the area of the camera module, where the adhesive can be applied with a thicker layer. Once the lid is free, remove it and put it in a safe place, preferably on the soft tissue with the face down.

Dismantling the protective panel and disconnecting the plumes

Once the glass is removed, you will see the inside of the smartphone, which is covered with a plastic lining that protects the main components from dust and mechanical stress. This panel is screwed with many small screws of different sizes, so it is recommended to photofix or spread the screws according to their location on the board. Unscrew the screws sequentially, starting with those that are closer to the center or have color markings.

Under the plastic lining, you hide the top of the battery, the display plumes, the main and front camera connectors, and the charging connector. The first thing you need to do is turn off the battery plume to turn off the device. To do this, carefully bend the locking connector with a plastic blade, avoiding the use of metal objects that can damage the contacts.

Then you have to disconnect the main plume of the display and the camera plumes, often additionally fixed metal clipplates, which also require careful dismantling, and once all communications are turned off, you can completely remove the plastic panel, allowing access to the bulk of the components, including the battery itself.

Removal of the Redmi Note 7 battery

The battery in the Redmi Note 7 (BM4B) is glued to the middle frame of the device firmly enough, which is the standard for modern smartphones. Just pull it by the tongue, as in some other models, you can not do this here - you can pull the tongue only after the bulk of the glue is dissolved or cut off. The main difficulty is to separate the battery without damaging its body and without deforming it.

There are several effective ways to remove:

• 🧵 Using dental floss or a thin string: the method allows you to “resaw” the layer of glue, threading the battery from side to side.
• 💧 Application of a special solution (Isopropyl alcohol): the liquid is applied around the perimeter of the battery to soften the adhesive.
• 🌡️ Reheating: The device is warmed again by a hairdryer in the battery area to a temperature 40-50 degree.

The safest method is to combine heating with using a plastic card or a shoulder blade. Carefully peel the battery from different sides, trying not to bend it. If you feel strong resistance, add some more solvent or heat. Never use sharp metal objects between the battery and the frame.

⚠️ Warning: It is strictly forbidden to pierce or bend the battery at any angle.Even microscopic damage to the internal structure can lead to ignition minutes or hours after the incident.

💡

To make it easier to remove the battery, you can use a suction cup by attaching it to the center of the battery and creating tension while you cut the glue around the edges.

Comparison of extraction methods and risks

The method of dismantling depends on the tools and experience of the wizard, and each method has its advantages and disadvantages, which must be considered, so as not to turn a simple repair into an expensive replacement for the display or the entire board.

The safest for a beginner is the use of dental floss in combination with moderate heating, since this method eliminates the risk of piercing the battery with a sharp object. Chemicals require caution that the liquid does not get on the contacts of the connectors or under the display, where it can cause corrosion or detachment of the adhesive layers of the screen.

If you've chosen a mechanical method using blades, you're going to be extremely slow. Control the force applied to the tool. It's better to spend an extra 10 minutes on a neat tweak than to instantly disable the device. Remember that the battery is a power source, and its integrity is critical to safety.

💡

The combined approach (heat + thread) provides the best balance between the speed of operation and the safety of smartphone components.

Installation of a new battery and assembly

Once the old battery is successfully removed, you need to prepare the seat for the new one. Carefully clean the frame of the residues of old glue and double-sided tape using a plastic card and, if necessary, a little alcohol. The surface should be perfectly smooth and clean so that the new battery will lie flat and securely fixed.

The new BM4B battery must be glued with two-sided tape strips (usually included) or a thin layer of B-7000 glue around the perimeter. Don't overdo it with glue: excess can squeeze out and stain the internal components or screen. Let the glue dry a little (if liquid is used) before inserting the battery.

Place the battery in place, gently pressing it all over the surface. Connect the battery plume to the motherboard until the characteristic click. Before the final assembly, it is recommended to check the device's health: connect the display plume and turn on the smartphone. If everything works correctly, turn off the battery again (if necessary), put the plumes down, fasten the protective panel and return the back cover to place, pre-applying a new layer of glue around the perimeter.