How to replace the battery on Xiaomi Redmi 5: the complete guide

Xiaomi Redmi 5 was deservedly considered a hit with sales due to its excellent price-performance ratio, but time does not spare lithium-polymer batteries. If your device begins to quickly discharge, turn off in the cold or show the wrong percentage of charge, then it is time to think about replacing the energy source. This is a common problem for gadgets released several years ago, and self-solving the issue saves significant funds.

The battery replacement process in this model has its own peculiarities related to the design of the body and the location of the plumes. Unlike modern flagships with waterproofing, disassembly is relatively simple here, but requires accuracy and understanding of the physical properties of adhesives. Wrong actions can damage the display or plume of the main camera, so it is worthwhile to carefully study the theoretical part before starting work.

In this guide, we will take a look at everything from the selection of a quality component to the final calibration of the system, what tools you will need, how to safely disconnect old connectors and what to do if the new battery is not charging. A competent approach to repair will extend the life of your favorite gadget for several more years of active use.

Diagnosis and selection of components

Before disassembling the case, make sure that the problem lies in the wear of the chemical element, and not in the software failure or malfunction of the power controller. Often users confuse rapid discharge due to background applications with real degradation of the capacity. Check the usage statistics in the settings → Battery to exclude software “gluttonous” processes.

When choosing a new battery for Redmi 5, it is critical to pay attention to labeling and capacity. The original capacity is 3,300 mAh, and any significant upside deviations should be alarming, as it is difficult to physically increase the energy density in the same dimensions in a short time. BMS, supercharger.

⚠️ Warning: Buying cheap counterparts without a brand often leads to battery bloating after a month of use, which can damage the display or back cover of the smartphone.

To replace it, you'll need not only the power supply itself, but also a suite of specialized tools. The absence of suitable screwdrivers or mediators can turn a simple procedure into a risky operation to save the surviving parts.

• 🛠️ Precision screwdrivers (cross-haired) PH000 flat)
• 📱 Plastic mediator or blade for opening the body
• 🌡️ dryer or warmer
• 🧲 Magnetic screw-sorting mat
• 🧹 Isopropyl alcohol and a lilac-free napkin

Preparation of the workplace and tools

Quality repairs start with space management. You'll need a well-lit table with a flat surface, where nothing will distract you. Small screws in Xiaomi smartphones tend to fly around the room when you're careless, so having a magnetic mat or even white paper will make it much easier.

Before you start any work with electronics, you need to protect yourself from static electricity, which can disable sensitive chips, just touch a grounded metal object or wear an antistatic bracelet if you have one. It is also important to make sure that the smartphone is turned off completely, and not just in sleep mode.

The glue that holds the back cover is very strong at room temperature, and trying to tamper with a cold tool is almost guaranteed to cause cracks in the glass. The heating should be uniform, without local overheating, which can damage the display matrix or melt the internal plastic elements.

The process of dismantling the Redmi 5 hull

Xiaomi Redmi Model 5 It's a sandwich, and the main fasteners are screws and adhesives. SIM-And then, using a hair dryer heated to a temperature of about a temperature, you can use a memory card to take the mechanical stress off the frame. 80-90 carefully warm the perimeter of the back cover during 2-3 minute.

After warming up, insert the mediator into the gap between the frame and the lid, moving along the edges. Do not try the lid in one place, the glue should gradually move around the perimeter. If you feel strong resistance, stop pulling and add a little more heat, otherwise the glass may burst from the voltage.

When the lid is removed, you will see the inside of the smartphone. Immediately notice the plume connecting the main board to the lower board (where the charging connector is located), which runs over the battery and is often fixed by a metal plate or simply pressed by a module. Be extremely careful not to damage it in further manipulation.

Dismantling of the old battery

The most critical thing is to remove the spent element. In Redmi 5, the battery is attached to a fairly aggressive double-sided tape, and simply pulling it out with your fingers or tweezers can cause the body to puncture and the remnants of the electrolyte to ignite, which is extremely dangerous.

To safely extract, use a hairdryer again, warming the center of the smartphone on the back (if the lid is removed) or through the screen (with great care). An alternative and safer method is to use a thin line or plastic card. Strip the line under the battery and saw the glue in reciprocal movements, as if cutting off the battery from the case.

If you use a metal tool, make sure it doesn't close the connector contacts on the main board. It's best to remove the metal protective plate covering the plume connectors before you start dismantling, which is usually mounted with several screws that need to be twisted counterclockwise.

⚠️ Warning: Never puncture or bend an old battery. Damage to the inner layers of a lithium polymer cell can cause an instant chemical reaction, releasing heat and smoke.

Once successfully removed, clear the seat of the old glue residue. Use a cotton swab dipped in isopropyl alcohol to remove the sticky layer. The surface must be clean and fat-free so that the new fixing tape lays flat and securely on the battery.

Installation of a new battery and assembly

Before installing a new component, make sure that its connector matches the connector on the Xiaomi board.Connectors may have different pin locations, otherwise installing an inappropriate model will short circuit.Gently connect the battery plume to a characteristic click, making sure it sits tight and flat.

Stick new strips of double-sided tape onto the body or on the battery itself (depending on the configuration). Do not use superglue or other liquid adhesives - they can damage the insides and make future replacement impossible without breaking down. Press the battery to the case and hold for a few seconds for initial fixation.

Then put the metal plate back in place and screw all the screws. It's important not to pull the screws over, because the thread in the plastic pillars of the case can break. Follow the assembly sequence: first the bottom board and the plumes, then check the inclusion, and then finally install the back cover.

• 🔌 Connect the battery plume and make sure the contact is reliable
• 🔩 Install a metal protective cover and twist the screws
• 🧪 Test the lid before the lid is glued.
• 🧹 Degrease the edges of the body for better fitting of the cover
• 🏠 Carefully press the back panel, starting from one of the corners

The back cover is best fixed with a special sealant glue (for example, B-7000), which retains elasticity after drying. Apply a thin strip of glue around the perimeter, press the cover and lock the smartphone with rubber bands for 1-2 hours before the composition is completely dry.

First start and calibration of the system

Once the device is built, it needs to be properly commissioned. The new battery may have a charge of about 30-50%, but the system needs time to properly calibrate the charge controller. Turn on the smartphone and wait for the MIUI operating system to fully load.

To calibrate, it is recommended to completely discharge the device before automatically turning off, and then put it on charge when turned off to 100%. After reaching full charge, keep it on charging for another hour, this procedure will help the system correctly determine the real capacity and correctly display percentages.

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To extend the life of a new battery, try not to drop the charge below 15% and do not keep the phone on charge constantly after reaching 100%.

If you see a quick discharge after replacing or your phone is warming up in downtime, check the running processes. Sometimes after replacing the battery, the system can re-index files, which temporarily increases power consumption. If the problem persists for more than 3-5 charge-discharge cycles, it may be a faulty battery or a board malfunction.

Replacing the battery with Xiaomi Redmi 5 is an affordable way to bring the smartphone back to life. With careful execution of all steps and the use of quality components, the device will delight you with autonomy as much as a new one.