Replacement of the battery on Xiaomi Redmi 5 Plus: Step-by-step analysis

Redmi 5 Plus smartphones launched in early 2018 have already come a long way. Over time, any lithium-ion power source degrades, losing its capacity and stopping holding the charge the way it did on day one. Users often notice that the phone discharges quickly, turns off in the cold or the percentage of charge jumps chaoticly.

However, the design of modern gadgets, including Xiaomi models, involves the absence of easily removable covers. To get to the internal component, you will have to carefully open the case, which requires a certain skill and special tools. Wrong actions can damage the plumes, screen or the newest part. That is why it is important to follow the algorithm of actions clearly so as not to damage the fingerprint module, which in this model is integrated into the rear panel.

In this article, we will take a closer look at how to get an old battery and install a new one. We will discuss the tools, safety practices for working with bloated elements and the nuances of connecting plumes. Even if you have never done electronic repair before, a careful study of the material will help you perform the procedure yourself and save on the services of the service center.

Preparation of the workplace and necessary tools

Before starting to disassemble the Xiaomi Redmi 5 Plus, you need to organize a comfortable workspace. The surface should be clean, well-lit and, preferably, not slippery. Small screws and parts are easy to lose, so it is recommended to use a magnetic mat or containers to sort the fastener. The absence of dust is also critical, as it can get under the screen or into the charging connectors.

To do this successfully, you need a specific set of tools that can make the process painful. Using inappropriate items, such as knives or pins, greatly increases the risk of damage to internal components or injury.

• 🔧 Set of screwdrivers (mandatory presence of cross-haired) PH000 and PH00 hull-rotor).
• 🔥 A hair dryer or thermophene (to soften the glue under the back cover).
• 💳 Plastic suction cups and mediators (scapula) for neat opening.
• 🧤 Tweezers with dielectric coating for working with small elements.
• 🧪 Isopropyl alcohol or special solvent B-7000 glue-residue.

Special attention should be paid to the source of heating. A normal household hair dryer for drying hair may not give enough temperature, whereas a building hair dryer requires caution not to overheat the screen matrix or melt the plastic frame. The optimal heating temperature of the back cover is about 80-90 degrees Celsius.

Safety and diagnostics of battery condition

Lithium-ion batteries are sources of chemical energy, and if mishandled, they can be dangerous.Be sure to turn the device off before starting work. If the phone turns on, it is recommended to discharge it to a level of 20-25%, since working with a fully charged battery increases the risk of fire in the event of an accidental short circuit.

Particular care should be taken if the old battery has signs of bloating. The bloated battery Xiaomi Redmi 5 Plus becomes thinner in the center, but expands significantly in the area, exerting pressure on the screen and the back cover. When the shell of such a element is punctured, electrolyte ignition or toxic smoke can occur. If you notice a deformation, do not press on the center of bloating.

⚠️ Warning: Never attempt to pierce, bend or heat a bloated battery directly.If the battery is stuck and not being removed, do not use force, but carefully cut the latch strips.

It is also important to protect your eyes from possible sparks or chemicals: Work in a well-ventilated environment, especially if you plan to use chemical solvents for glue. Hands should be dry, and your fingers should not have static electricity, which in theory can damage the board's sensitive electronics.

Rear cover removal and access to internals

Model Redmi 5 Plus has an all-metal body with plastic inserts for antennas, and the back panel is glued around the perimeter. SIM-maps to allow air to escape and prevent pressure damage to the internal machinery, then carefully warm the perimeter of the back cover with a hair dryer during the 2-3 minutes, constantly moving the heat source so as not to overheat one point.

Once heated, apply the suction cup to the bottom of the back cover, closer to the Mi logo, and slightly pull up to create a gap. Insert a thin plastic mediator into the resulting gap. Do not use metal blades, as they can easily damage antenna plumes running along the edges or tear the plume of the fingerprint scanner.

We use the mediator along the perimeter, gradually peeling off the panel. Pay special attention to the upper left corner, where the camera module and flashes are located, where the glue can hold tighter. When all the latches are snapped, take your time to abruptly remove the lid. It is connected to the motherboard by a thin plume of the fingerprint scanner.

Once the plume is turned off, the back cover is completely removed, allowing access to the metal screen covering the main board and the battery, and at this point you'll see screws that lock the metal plate, and you need to unscrew them to access the battery connectors.

Disconnecting plumes and removing the old battery

Once the metal shield is removed, you will see the interior of the smartphone, and the first thing you need to do is to turn off the battery connector from the motherboard, a critical step to prevent short circuits when working with other components.

The battery in Xiaomi Redmi 5 Plus is attached to double-sided tape and possibly special adhesive strips. To extract it, you can not pull on the top edge, as this can lead to deformation of the battery. It is recommended to use a thin line, dental floss or a special plastic card to cut the adhesive layer under the battery.

Carefully thread under the accumulator, making sawing movements from side to side. If the battery is glued very strongly, you can slightly warm the back of the smartphone (without the lid) on a warm, but not hot surface to soften the glue. Do not exceed the temperature of 40-50 degrees when you are in direct contact with the battery.

Once the adhesive layer is cut, carefully remove the old power cell. If there is any glue left on the body, it must be carefully removed so that the new battery lays flat and tight, the surface must be clean and fat-free.

Installation of a new battery and assembly of the device

Before installing a new battery, compare it to the original one that was removed. They should have identical dimensions, contact locations and voltage. Usually, new Xiaomi batteries already have a film-protected adhesive layer on them. If there is no adhesive, use special electronics tapes, but don't use superglue or other aggressive chemicals.

Put the new battery in the compartment, making sure it's flat and doesn't stick out over the frame. Connect the plume to the motherboard before the characteristic click. Make sure the connector is flat and locked. You can now check the performance by turning the phone on briefly without fully assembling the case.

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Before final assembly, test the touchscreen, speakers, microphone and cameras, which will avoid re-disassembly if any plume is accidentally damaged in the process.

If everything is working correctly, put the metal plate back in place and twist all the screws. Notice the length of the screws: they may differ from one place to another, and if you confuse them, you can damage the thread or you can break the board with a long screw.

The back cover before installation should also be cleaned of old glue and degreased. Apply a new layer of B-7000 glue or use ready-made adhesive frames around the perimeter. Press the lid and lock the smartphone with gums for 15-20 minutes before the initial grasp of the glue.

First start and calibration of the new battery

Once the device is assembled, the new battery must be properly calibrated, which will help the MIUI system correctly display its charge level and prolong the life of the cell, first put the phone on charge when it is off and charge it to 100%.

After reaching full charge, leave the device on charge for another hour. Then turn on the phone. If the indicator shows less than 100%, re-connect the charge. Repeat the cycle until when you turn on it is stable 100%. Then you can use the smartphone as normal, discharge it to 10-15% and recharge.

Modern power controllers in Xiaomi are smart enough to set up on their own, but the initial calibration helps to avoid a situation where the phone turns off at the shown 20-30%. Also watch the heating temperature in the first days of use - the new battery can warm slightly when charging actively, this is normal.

Frequently Asked Questions (FAQ)

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Quality replacement of the battery returns the smartphone a second life, allowing you to use the device for another 1-2 years without being tied to the socket.