Replacement of the battery on Xiaomi Poco M3: step-by-step instructions

Xiaomi Poco M3 is known for its outstanding battery autonomy with a battery capacity of 6000 mAh, but over time even such a powerful source of energy degrades. If your device starts to quickly discharge, turn off in the cold or swell, the only right solution is a physical replacement of the battery, which requires care, since the back cover is glued and the internal components are compact.

Before you start disassembling the case, you need to prepare the workplace and make sure that you have specialized tools. Don't try to open the phone with your nails or sharp objects like knives, as this is almost guaranteed to damage the plastic frame or, worse, puncture the battery itself. In this article, we will discuss how to safely remove the battery without damaging the plumes and other components.

Tools and workplace preparation required

To do this successfully, you need a minimal but specific set of tools that can handle delicate electronics, and the main enemy of disassembly is static electricity and sloppy handling of adhesives, so you can't ignore this step.

You'll need a hair dryer or a heating platform to soften the glue under the back cover, a suction cup to open the case, a set of plastic mediators (scapula) and a cross screwdriver, usually the size of a PH00 or PH000. To turn off the plume, you'll need a plastic blade to avoid damaging the contacts on the motherboard.

• 🔧 A set of precision screwdrivers for the screws of the body.
• 🔥 Hazer for heating the perimeter of the back panel.
• 🛠 Plastic blades and mediators for opening.
• 🧲 Magnetic screw-sorting mat.

Pay special attention to the cleanliness of the table: scattered screws can get lost, and metal shavings can cause a short circuit. SIM-map, if it is installed.

⚠️ Warning: Don't heat the device too much. If the body becomes so hot that it can't be held in your hand, you risk damaging the display or internal components. 80-90 degree.

Removal of the back cover and removal of protection

The first step is to carefully remove the rear panel, which in the Poco M3 model is made of polycarbonate and planted on double-sided tape around the perimeter.Warm the edges of the device evenly with a hairdryer for 2-3 minutes, paying special attention to the corners where the glue is usually the most.

After heating, suck a vacuum suction cup at the bottom of the back cover and pull up slightly, creating a gap. Insert a thin plastic blade into the resulting gap and, without undue effort, drive it along the perimeter, cutting the adhesive layer. Move smoothly, trying not to touch the internal elements.

Once you remove the lid, you'll see the inside of your smartphone, and the first thing you need to do is unscrew a lot of screws that lock the plastic bar that covers the plumes of the display and the battery, and the screws can be of different lengths, so it's important to remember their location or use a magnetic mat with markup.

When you remove the safety bar, you get access to the connectors, and it's very important to be careful, because the plumes are very thin and easily break when you jerk them, and you need to de-energize the device before you physically impact the components.

Disconnecting plumes and removing the old battery

The critical point is to properly disconnect the battery from the motherboard.Never try to pull the battery out while the connector is connected, as this can cause the circuit to short and the board to fail.Look for the battery connector, it's usually located at the top or middle of the board under the metal screen.

Using a plastic blade, gently pull the connector upwards, the movement should be strictly vertical, without distortion, and after turning off, you can start removing the battery itself, which is also fixed on the adhesive strips.

To extract the battery in the Xiaomi Poco M3 often provides a special tongue-removal, but if it is not or it broke, you will need to reheat the back of the device. Carefully tuck the battery with a spatula from different sides, trying not to damage its shell.

• 🔋 Turn off the battery connector first.
• 🌡 Heat the battery area to soften the glue.
• 🚫 Do not use metal tools near the battery.
• 👐 Pull the battery evenly, without sharp jerks.

⚠️ Warning: It is strictly forbidden to pierce or bend an old battery; damage to a lithium polymer battery can cause fire or chemical burns; if the battery is too swelled, proceed with utmost care.

Installation of a new battery and assembly of the device

Before installing a new battery, you must thoroughly clean the seat of the residue of old glue. Use a soft cloth soaked in isopropyl alcohol to degrease the surface. Make sure there is no dust and villi inside the housing.

The new Poco M3 battery usually comes with adhesive strips already applied. If none are available, use a special B-7000 glue or double-sided electronics tape. Don't apply glue to the center of the battery, only around the perimeter, so as not to disturb the heat sink or damage the cells in future dismantling.

Connect the new battery plume to the motherboard before you click. Make sure the connector sits flat and tight. After that, you can temporarily turn on the phone without screwing the lid to check the system's performance and charging.

If the device is turned on and shows the correct percentage of charge, you can proceed to the final assembly. Set the protective bar in place, twist all the screws into the appropriate holes and glue the back cover, preheating its edge and applying a new layer of glue or tape.

Table of compatibility and characteristics of the battery

When choosing a new battery, it is important to focus on the original specifications or quality analogues. Below are the basic parameters that should fit your device.

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Using a battery labeled other than BM4C can cause the power controller to work incorrectly and display an incorrect percentage of charge.

Primary calibration and system start-up

After successful battery replacement and body assembly, the first charge must be properly charged, which will help the power controller calibrate the charge level readings, plug in the original charger, and leave the phone to charge up to 100% even after the indication is turned off.

Then completely discharge the device before turning it off, repeat the charge cycle to 100% again, and this will help the system re-determine the real capacity of the new cell and correctly display the percentages.

In the first days of use, watch the heating temperature. The new battery may warm up a little while it's running, but it doesn't have to be hot to the touch in downtime. If you notice anomalies, you should double-check the procedure.

⚠️ Warning: If the phone does not respond to charging after replacing, check the density of the connector. Sometimes you need to remove the protective bar again and press the connector more strongly until a characteristic click.

Frequently Asked Questions (FAQ)

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After you replace your battery, use apps like AccuBattery for a week to track the wear rate and actual capacity of the new cell.