Smartphone Xiaomi Redmi 5 Plus has proven itself as a reliable device with excellent autonomy, but time does not spare even the highest quality lithium-ion batteries. If your device began to quickly discharge, spontaneously turn off in the cold or inflated, then replacing the battery becomes an inevitable necessity. Self-replacement saves a significant amount compared to contacting the service center, but requires accuracy and understanding of the device gadget.
The process of removing the battery in the Redmi 5 Plus range is difficult, because the back cover is not removable, but is glued around the perimeter. This distinguishes the model from the older versions, where access to the battery was opened by a simple movement of fingers. You have to work with adhesive base and fragile plumes, so rush in this case is the main enemy of successful repairs.
The workspace must be well lit and the table surface clean and protected from static electricity. The Redmi 5 Plus has a metal body that requires a special approach to heating so as not to damage the internal components or the display module itself during the separation of the rear panel.
Tools and workplace preparation required
To do the job properly, you need a specialized set of tools. You should not try to replace the battery using only a knife or a screwdriver, as this increases the risk of damage to the case or, worse, a puncture of the battery. The minimum set includes a dryer (construction or household at a minimum), a sucker, plastic mediators and a set of screwdrivers.
Special attention should be paid to safety. Lithium-ion batteries are sensitive to overheating and mechanical damage. If during operation you notice that the battery has started to smoke or emit a strange smell, immediately stop working and take the device out into the open air.
- 🔧 Precision screwdrivers (cross-hatched) P2, P5) hull-rotor.
- 🔥 Building hair dryer or thermophene for softening glue.
- 📱 Plastic blades and mediators for opening the body.
- 💧 Isopropyl alcohol or special liquid B-7000 glue-removal.
- 🛡️ Protective glasses and gloves to protect against possible glass or chemical fragments.
Prepare a screw folding container. Xiaomi Redmi 5 Plus uses screws of different lengths, and if you confuse them with places during assembly, you can damage the thread or punch through the motherboard. It is recommended to use a magnetic mat or simply spread the screws in order of their extraction on a sheet of paper with signatures.
☑️ Pre-commencement checks
Rear cover removal process
The most difficult step, which often scares newcomers, is to remove the back panel. In the Redmi 5 Plus, it's made of metal and attached to a two-part glue. First, you need to unscrew the two screws located at the bottom of the smartphone, next to the charging connector, and then you can start heating.
Turn on the hair dryer and warm up the perimeter of the back cover evenly. Keep the hair dryer 3-5 cm from the surface, constantly moving it so as not to overheat one point. The optimal heating temperature is about 80-90 degrees Celsius. Don't overdo it: if the body becomes too hot for the hands, it's best to pause so as not to damage the display on the back side or the internal plastic elements.
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Use an infrared thermometer to monitor the heating temperature of the case.The optimal range for softening Xiaomi adhesive is 80-90 ° C. Exceeding 100 ° C can damage the display.
After 2-3 minutes of warming up, try gently inserting the suction cup into the bottom of the lid (where there is no camera) and pulling slightly upwards, creating a gap. Insert a thin plastic card or mediator into the resulting slit. Driving the instrument along the perimeter, cutting the adhesive layer. Movements should be smooth, without jerks, so as not to break the plastic latches, if any.
Exercise special care in the top of the smartphone, where the plumes of the display and the main camera are located. Although in the Redmi 5 Plus, the plumes go to the sideboard, the risk of hitting them with a metal tool still remains. If the lid does not respond, repeat the heating, but do not use brute force.
What to do if the cover is broken when removed?
Disconnection of plumes and access to the battery
After successfully removing the back cover, you will see the inside of the smartphone. The battery in the Xiaomi Redmi 5 Plus takes up most of the space, but access to its connector is blocked by a metal protective bar of the motherboard, which is screwed with several screws that need to be twisted out.
Use a magnetic screwdriver to keep the screws from dropping into the case. Once you remove the bar, you'll see the connection connectors. The first thing you need to do is turn off the battery plume, and you need to do this carefully, using a plastic blade or nail, but not a metal needle, so you don't close the contacts on the board.
- 🔋 Disconnect the battery plume from the motherboard.
- 📱 Turn off the main camera plume (located nearby).
- 🔌 Disconnect the display plume (if full access is required).
- 📡 Remove the antenna module Wi-Fi/GPS, if it interferes with access.
Once the power is out, you can start removing the battery itself, and it's also planted on an adhesive, but less aggressive than the lid, and there's often a plume under the battery that connects the bottom board to the top board (charging and microphone plume), and be very careful that if you put the battery on, it's easy to damage that plume, which will cause the microphone or speaker to fail.
Use a plastic card to extract the battery. Carefully tuck the battery in from different sides, trying not to bend it or pierce it. If the battery is swelling, any manipulation of it becomes dangerous, so act with utmost care, trying not to disturb the tightness of the battery housing.
Removing the old battery and installing a new one
The process of removing the old battery requires patience. The glue under the battery hardens over time, but heating helps soften it. You can slightly warm the battery area through the screen (pre-protecting the display from overheating), but it is better to use chemical solvents such as isopropyl alcohol, dripping it under the edges of the battery.
When the battery is free, clear the seat of the old glue.The surface must be flat and clean to securely lock the new cell.The new battery for the Redmi 5 Plus (model BN42 or BN44 depending on the region) must be fully charged at least 30-40% before installation, although modern power controllers usually cope with zero charge.
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Never use superglue (cyanoacrylate) to lock the battery or lid! it releases fumes that settle on the camera and sensors, disabling them, and also making re-repair almost impossible.
Put the new battery in the compartment, make sure the connector plume is not twisted and lies flat. Connect the connector to a characteristic click. Check visually if there are gaps between the battery and the frame. If the battery is not tight, it may not fit in size or there are lumps of old glue in the compartment.
Before the final assembly, we recommend you do an initial check. Without sticking the lid, plug the battery in and try to turn the device on. If the smartphone responds to the on button, the charging indicator lights up, or the MIUI logo appears, you're on the right track. If the screen doesn't light up, double-check the density of the plumes.
Device assembly and final inspection
The final step is assembly. Apply a new layer of glue (B-7000 or Xiaomi screens special glue) around the perimeter of the frame of the case. Try not to apply the glue too close to the edge so that when you press the cover it does not squeeze out and stain the body. Also avoid getting glue on the camera and sensors.
Put the back cover on and press it tightly around the perimeter, and you can use the stationery bands to get it fixed, wrapping them around your smartphone. 15-20 The screws on the bottom of the screws only twist after you make sure the lid is in place.
| Phase | Action. | Important nuance |
|---|---|---|
| 1. Preparation | Shutdown, SIM retrieve | Remove the protective case |
| 2.Heating | Perimeter heating by a phenome | Temperature not above 90°C |
| 3. Autopsy | Work as a sucker and mediator | Don't damage the plumes. |
| 4. Replacement | Disconnection and replacement of the ACB | Careful with the bottom-fee plume |
| 5.Assembly | Glue application and fixation | Use rubber bands for pressing |
After assembly, turn on the phone and let it work. 10-15 Check the sensor, the camera, the vibrations and the charging. If all the functions are working properly and the phone is not warming up in the battery area, the replacement can be considered a success. 0% and 100%.
How to Calibrate a New Battery?
Possible problems and solutions
Even with careful operation, there can be unexpected situations. One of the common problems is that the phone doesn't see the new battery or shows the wrong percentage of charge, in which case you should reopen the device and reconnect the connector, sometimes you need to reset the static voltage: turn off the battery, press the power button for 15 seconds, then reconnect.
Another problem is that the display detachs or stains appear after heating, because it's overheated, and if the stains don't go away after a couple of days, you might need to replace the display module, and you might also have a leakproofness problem if the glue is applied unevenly, which will affect the dust protection.
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If the battery warms up more than usual after the replacement, check if the plume is transferred or closed to the body, and this can also be a sign of a defective battery.
It's important to keep track of the screws. If you lose one of the motherboard's mounting screws, don't leave the hole empty. Vibration when you're running your smartphone can shake the board, causing the contacts to fall off. Use a similar-sized screw from the repair kit.
⚠️ Warning: If you smell burns or see smoke from the case while you're working, stop immediately. Place the device in a non-combustible container and take it outside. Continuation with a damaged battery may cause a fire.
⚠️ Warning: Never attempt to pierce a ballooned battery to "relieve pressure" and this is guaranteed to cause instant electrolyte ignition and fire.