Xiaomi Redmi 5 Plus, launched in early 2018, has proven to be a reliable “people’s” device with excellent autonomy. However, time is inexorable: even the best quality lithium-ion battery loses its capacity over time, stops holding charge and can suddenly turn off at 20-30% charge. If your device started to warm up, bloated or simply stopped living until the evening, I came to think about replacing the battery.
Self-replacement of the battery is a real opportunity to extend the life of your favorite gadget and save a significant amount of money that would have to be paid in the service center. Unlike modern models with glued housing and moisture protection, the design of the Redmi 5 Plus allows you to conduct the procedure fairly carefully, with a minimum set of tools, it is important only to observe the sequence of actions and safety.
In this guide, we will take a closer look at the process of dismantling an old battery and installing a new one. You will learn what the display plume has to do with how to unplug the lid properly without damage and what to look for when choosing a new battery. Remember that careless actions can damage internal components, so follow the instructions carefully.
Diagnostics and workplace preparation
Before you start disassembling, you need to make sure that the problem is in the battery. Software failures or background processes can simulate battery wear. Check the power consumption statistics in the Settings → Battery and Performance menu. If the discharge schedule looks smooth, but the phone turns off in the cold or jumps percentage of charge, most likely, chemical wear has reached a critical point.
To make a successful repair, you'll need to have a workplace, a desk that's well lit, a surface that's clean and non-conductive to avoid short circuits, all the tools you need in advance so you don't look for them when the case is open, and rush and lack of organization are the main enemies of the amateur master.
Pay special attention to safety. Lithium-ion batteries are sensitive to puncture and bending. A damaged battery can catch fire or even explode. So you do all the manipulations without undue effort, and if there is smoke or smell, immediately stop working and dispose of the cell.
⚠️ Warning: Never try to prick, squeeze, or heat a bloated battery with an open fire. Dispose of it to special battery reception points, not to a household garbage can.
To work, you will need the following tools:
- 🔧 Sets of screwdrivers (cross Phillips #00 and flat).
- 🎵 Plastic blade or mediator for opening the body.
- 🌡️ A hair dryer or heating plate (to soften the glue).
- 🧲 Magnetic mat or organizer for screws.
Choosing a high-quality battery for Redmi 5 Plus
The market of components is full of offers, but find a really high-quality power supply for the Redmi 5 Plus model number BN44) The original Xiaomi batteries have a hologram with QR-And there's a code and a security sticker that you can check on the official website, but even the originals in retail are often high-quality fakes.
When choosing, pay attention to the capacity. The capacity is 4000 If the seller offers 5000 or 6000 The same size, it is likely. 99% The technology we have today is only a small increase in energy density, but not a small increase in energy density. 25-50%. It is better to take a proven brand like Nohon or the original than nouneym with overrated characteristics.
Also important is the appearance of the contacts and the build quality: on a quality battery, the contacts are golden, without oxidation, and the controller board is neatly assembled. Cheap counterparts often have crooked wires or cheap insulation, which can lead to unstable smartphone operation.
| Parameter | Original / Quality analogue | Cheap forgery |
|---|---|---|
| Capacity | 4,000mAh (real) | Claimed 4000+, real 2000-2500 |
| Weight. | About 90-95 grams | Often lighter (less than 85g) |
| Marking | Clear, with QR-code | Lubricated, easy to wash |
| Price. | Medium and higher | Suspiciously low |
Do not skimp on this component, as a poor-quality battery can spoil the power controller on the motherboard, and then repair will cost much more.
How to check the battery multimeter?
The process of disassembling the smartphone body
Disassembly of Xiaomi Redmi 5 Plus begins with the device turning off. This is a critical step, as turning off the plumes under voltage can cause the backlight of the display or other components to burn. SIM-memory-card.
The body of the smartphone is built on an adhesive basis. To open it, you need to warm the perimeter of the back cover evenly. Use a hair dryer at medium temperature, warming the edges for 2-3 minutes. Don't hold the hair dryer too long at one point so as not to damage the display or overheat the battery. The plastic should become warm, but not hot.
After warming up, insert a plastic blade or mediator at the junction between the frame and the back cover. Better start at the bottom or the side faces, where there is usually a small gap. Carefully guide the tool around the perimeter, cutting the adhesive layer. Don't try to tuck the lid sharply - it can crack.
- 🔥 Warm up the edges of the body with a hairdryer during 2-3 minute.
- 🔪 Carefully insert the mediator into the gap and lead in a circle.
- 👐 Put the back cover in a safe place so as not to scratch.
- 🔍 Examine the insides for visible damage.
When the lid is removed, you'll see a plastic panel covering the bulk of the components, and it's screwed up with several screws. Unscrew them all using a cross screwdriver. The screws can be of different lengths, so remember or arrange them in order.
⚠️ Attention: Be extremely careful with plastic latches when removing the interior decorative panel. They are fragile and when a strong jerk easily breaks, after which the panel will dangle.
Disconnecting plumes and removing the old battery
When you remove the shield, you'll have access to the motherboard and the battery, and the first thing you need to do is turn off the battery-to-board plume, and that will keep the device from accidentally shorting as you go along.
The battery in the Redmi 5 Plus is based on double-sided tape. To remove it, you need to unstick special tongues (if they are preserved) or gently tuck the battery with a plastic card. Metal tools are extremely undesirable to use, as you can damage the battery shell.
If the battery is very tight, you can slightly warm up the area under the battery with a hairdryer through the open rear (if the design allows), or just be patient, slowly loosening the battery, the main thing is not to bend the battery and not to press it with your fingers.
☑️ Ready to retrieve the battery
Once you've removed the old battery, look around the niche, remove the residue of the old glue and tape so that the new battery is flat, the surface should be clean and fat-free, and if there's bloating from the old battery at the bottom, they should be carefully removed.
Turning off the display plume is not normally required to replace the battery, but if you're planning a deep cleaning, you can disconnect it, too. Do this by bending the connector locks upwards rather than pulling the plume out by force.
Installation of a new battery and assembly
Before installing a new battery, check its configuration. Often new batteries come with a set of adhesive strips. If they are not available, use a quality two-way electronics tape (such as 3M). Apply adhesive tapes to the smartphone body, rather than the battery itself, to simplify future replacements.
Put the battery into the niche, making sure the contacts match the connector on the board. Carefully press the battery over the entire area for reliable fixation of the glue. Then plug the battery plume until the characteristic click. Make sure the connector sits smoothly and without distortion.
Now you can do a pre-test. Without screws twisting or liding, press the power button. If your smartphone comes alive and shows charging or charging, it's a success. If the screen doesn't catch fire, double check the plume.
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Before final assembly, wipe the inside of the display and body with a microfiber.The dust left inside will be very noticeable against the light background of the screen and can cause broken pixels to appear from pressure.
Put the device in reverse order: install the plastic shield, twist all the screws. Make sure that no screw is left over. Then apply a new layer of glue or double-sided tape to the frame and tightly press the back cover. Lock the device with rubber bands on the back. 15-20 glue-stripping.
First start and calibration of the battery
Once assembled, the device is ready to operate, but calibration is recommended for the power management system to work properly, which is especially important if the battery memory controller has reset or if you notice that the percentage of charge will “jump”.
The calibration process is simple: discharge the smartphone until it is completely turned off (0%). Then put it on charge when it is off and wait for 100%. After that, you can turn on the phone. If the indicator is not 100%, keep on charging. Repeat the cycle 1-2 times.
Modern controllers in Xiaomi are smart enough to calibrate themselves in the background for days of active use, but manual calibration helps the system understand the real capacity of a new element more quickly.
⚠️ Warning: Do not use questionable apps from the Play Market to “calibrate” the battery. They only reset statistics in the system, but do not affect the physical controller of the battery, and sometimes may contain ads or viruses.
In the early days, watch the heating temperature. The new battery may warm up a little during the first charge-discharge cycles, that's okay. However, if the phone gets hot in idle mode, that's an excuse to check the connection or quality of the battery itself.
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A high-quality battery replacement returns the smartphone factory autonomy and eliminates the risk of bloating, prolonging the life of the device for 2-3 years.