Why do you need to take off the battery from the Redmi 7?
The battery is one of the most vulnerable components of the smartphone, and the Xiaomi Redmi 7 is no exception. Over time, the battery loses capacity, swells up or stops holding the charge. In some cases, it has to be removed to replace, diagnose or repair other internal parts, for example, if the phone stopped turning on after a fall, does not hold a charge for more than 10 minutes, or the body is markedly deformed, these are direct signs of battery problems.
But the layman should remember that disassembling your smartphone on his own is a security issue (if it still works) and can damage the board, plumes or display. If you're not sure about your skills, you should contact the service center, but if you decide to act yourself, this will help you to do everything carefully.
Important: Redmi 7 has a non-removable battery glued to the body, and it requires patience and special tools to remove it. Don't try to pull the battery out by force, it will cause contacts to break or even fire!
Preparation: What will be needed for the job
Before you start disassembling, gather all the necessary tools and materials, without which the process can be delayed or end in damage to the phone.
- 🔧 Plastic blades (2-3 pieces) - for careful lid slinging and disconnection of plumes.
- 🔨 Cross screwdriver (size) PH00) — screw-twisting.
- 🧲 Magnetic mat or tray – so as not to lose small details.
- 🔥 Dryer or thermo-air station - to soften the glue under the battery.
- 🧴 Isopropyl alcohol (90%+) — glue-residue.
- 🩹 Gloves and safety glasses in case the battery is damaged.
Also, prepare the workspace: it should be well lit, free of dust and moisture. Put your phone on a soft substrate (like a silicone mat) so that you don't scratch the case. If you don't have experience disassembling the equipment, practice on an old smartphone or watch video instructions, this will help avoid typical mistakes.
Step 1: Turn off the phone and retrieve SIM-map
The first and mandatory step is to shut down the power completely. Even if the phone doesn't respond to the buttons, try holding the Power + Volume Up for 10 to 15 seconds. If the screen doesn't go out, maybe the battery closes, in which case it's better to trust the professionals to disassemble the device.
After turning off, remove the tray for SIM-This will prevent accidental damage to the contacts during disassembly. Make sure that the phone is free of moisture - even microscopic drops can cause a short circuit when the body is heated with a phenome.
⚠️ Warning: If the phone has been in water or condensate, don't disassemble it yourself! corrosion on the board can lead to unpredictable consequences when heated.
Step 2: Removal of the back cover
The Redmi 7 back cover is mounted on latches and glue. To remove it, heat the edges of the body with a hair dryer (temperature no higher than 60-70°C) for 1-2 minutes. This will soften the glue and make it easier to separate. Start at the bottom edge where the charging connector is located.
Insert a plastic blade into the gap between the lid and the body and carefully guide it along the perimeter. Don't apply excessive force - the plastic can crack! If the lid does not respond, reheat the problem area. After removal, put it aside, avoid scratching on the inside (there is an NFC antenna, if you have one in your model).
Heat the edges with a hairdryer (60–70°C) | Use a plastic blade | Start at the bottom edge | Do not apply excess force | Check for no latches-->
Step 3: Disconnecting the plumes and batteries
When you take the lid off, you'll see the battery covered with black film, and before you try to remove it, be sure to unplug the battery plume from the motherboard, which is located at the top of the phone and is attached by a small connector. Carefully tuck it in with a plastic blade, don't pull the wires!
Also, turn off the display and camera plumes (if they interfere), which are fixed by latches that need to be lifted with a screwdriver. If you don't disconnect the battery before heating, there's a risk of short circuits when you accidentally touch the board! This is one of the most common mistakes of beginners.
| schleife | Location. | How to disconnect |
|---|---|---|
| Battery | The top of the board, next to the camera | Pull the shoulder blade, pull only the connector. |
| display | Board centre, under metal screen | Lift the latch with a screwdriver |
| Back camera. | Upper left corner | Slide it sideways carefully. |
Step 4: Removing the battery
Now, to the most critical stage, the battery in Redmi 7 is glued to the body with double-sided tape. To remove it, use a hairdryer again: heat the battery on the back side (through the body) for 2-3 minutes. The temperature should not exceed 80 ° C - overheating can damage the battery!
After heating, try to tamper with a plastic blade from any angle. If it doesn't lend itself, put a thin guitar string or a special battery mediator under it and carefully cut through the glue while driving the string back and forth. Don't use metal objects - they can puncture the battery!
What to do if the battery is blown?
⚠️ Warning: If you smell a sharp chemical smell or notice smoke while removing the battery, stop working immediately! Place the phone in a safe place (for example, on the balcony) and don't touch it with your bare hands. The battery may have damaged and now it is dangerous!
Step 5: Installation of a new battery
If you removed the battery to replace, before installing the new battery, clean the seat of glue residues with isopropyl alcohol. Apply a new two-way scotch (you can use tape for batteries from Xiaomi or universal 3M) and gently press the battery.
Make sure the contacts match the connector on the board. Connect the battery plume last, after all the other components are connected. Check the phone for health before assembly: plug the charger and make sure it turns on. If the screen doesn't respond or the phone overheats, turn it off immediately and check that the plumes are properly connected.
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If the phone discharges quickly after replacing the battery, calibrate: completely discharge it, then charge it to 100% without interruption. Repeat the procedure 2-3 times.
Frequent Mistakes and How to Avoid Them
Even experienced tycoons sometimes make mistakes when replacing a battery, and here are the most common ones and ways to prevent them:
- 🔋 Damage to battery plume - never pull the wires, just the connector!
- 🔥 Overheating with a hair dryer - keep the temperature below 80°C and do not direct the airflow to one point.
- 🛠️ Loss of screws – use a magnetic mat and sort parts into groups.
- 💥 Battery puncture – do not use sharp metal objects for tweaking.
If the phone does not turn on after assembly, check:
- Correct connection of all plumes (especially the display and battery).
- No damage on the board (blackened areas, chipped).
- Charging is possibly a problem in the cable or adapter.
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If the phone doesn't hold a charge after the battery is replaced, it's likely that the power controller on the board is a problem, and that requires a diagnosis at the service center.