How to change the battery in the phone Xiaomi: instructions with photos and videos

Replacing the battery in a Xiaomi smartphone is a challenge that every device owner over 2-3 years of age will face sooner or later. Even the best batteries lose capacity over time: the phone starts to run out in a few hours, turns off at 20-30% charge or refuses to turn on without connecting to a charge. If you notice these symptoms, it's time to think about replacing.

In this article, we will discuss in detail how to change the battery in the Xiaomi phone with your own hands – from choosing a new battery to assembling the case. We will look at the nuances for popular models (Redmi Note 10/11/12, Poco X3/X4, Mi 11/12), tell you what tools you will need, and warn against typical mistakes that can bring your phone down. Following our instructions, you will save on the service center and prolong the life of your gadget for another 2-3 years.

Signs that it is time to change the battery

Before you start disassembling your phone, make sure the battery is the problem.

• 🔋 The phone discharges in 3-4 hours with moderate use (social networks, instant messengers).
• 📉 The percentage of charge “jumps”: for example, from 40% immediately drops to 15%.
• ⚡ The device turns off at 20-30% charge and does not turn on without connecting to the network.
• 🔥 The body heats up in the battery area even without loading.
• 🛑 The phone does not keep the charge off (discharges overnight).

If you know at least 2-3 items on the list, the probability of battery wear is 90%. To confirm the diagnosis, check the battery status through the application AccuBattery (available on Google Play), it will show the real capacity of the battery and the degree of wear. For example, if the original capacity was 5000 mAh, and now 3500 mAh, it is time to change the battery.

⚠️ Warning: If the phone swells in the battery area (the body started to "splash" or the screen rose), DO NOT try to turn it on or charge. This is dangerous: lithium-ion batteries can ignite. Immediately remove the battery or take the device to the service.

What battery to choose for Xiaomi

The quality of the new battery depends on how long your phone will last after you replace it.

1. The original vs. analogue: Xiaomi’s official batteries (with the Mi or Redmi logo) are more expensive, but they guarantee compatibility and safety. Analogues (for example, from Baseus, Remax) are cheaper, but can wear out faster or do not match the declared capacity.
2. Capacity. Choose a battery with the same or slightly higher capacity than the original. For example, a 5200 mAh battery will suit the Redmi Note 10 Pro (5,020 mAh).
3. Socket type. Xiaomi has batteries with 3-pin and 4-pin connectors. You can't confuse them, the phone won't turn on.
4. Manufacturer. Verified brands: Xiaomi Original, ZMI, Anker (for analogues). Avoid no-name batteries without certificates.

Where to buy:

• 🛒 Official Mi Store (Guaranty of Originality).
• 🌍 AliExpress (Look for sellers with a 98 rating%+ photo-reviewed).
• 🏬 Local parts stores (check certificates).

Battery replacement tools

To disassemble Xiaomi and replace the battery, you will need:

• 🔧 Screwdriver kit: cross-haired (PH00), Flat (1.5 mm), five-beamed (Security Torx) T5 for some).
• 🧲 Screen suction cup (if you need to remove the display).
• 📏 Plastic blades/mediators (to disconnect plumes and batteries).
• 🔥 Dryer or thermo-air station (to soften the glue under the battery).
• 🧴 Isopropyl alcohol (90%+) oregano.
• 🔋 New battery (see previous section).
• 🧤 Gloves and safety glasses (in case the battery is swollen).

The cost of a full set of tools - from 800 to 2 000 ₽. If you do not plan to repair regularly, you can buy only screwdrivers and shoulder blades, and replace the hair dryer with a household one (at minimum power).

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Before disassembling, take a photo of each step on a friend's phone or tablet, which will help to properly assemble the device back, especially if you're disassembling the smartphone for the first time.

Step-by-step: how to change the battery in Xiaomi

The process of replacing the battery varies depending on the model, but the overall scheme is the same. We will analyze the universal algorithm using the example of the Redmi Note 10 Pro (similar to most Xiaomi with a non-removable battery).

Step 1: Removing the back cover

Most modern Xiaomi have a non-removable body glued around the perimeter.

1. Heat the back end edge with a hair dryer (~60°C, no higher!) Keep the hair dryer at a distance of 5-10cm to avoid damaging the plastic.
2. Insert a plastic blade into the gap between the case and the screen (start at the bottom edge where the speakers are usually located).
3. Carefully swipe the perimeter, separating the glue. Do not force - you can damage the plumes!

Step 2: Battery disconnection

When you take the lid off, you'll see the battery glued to the body.

1. Disconnect the battery plume from the motherboard (use a plastic spatula). Don't pull the wires!
2. If the battery is swollen, don't try to bend it or prick it. Carefully tuck it off the edge and pull it out.
3. To remove the adhesive under the battery, use isopropyl alcohol or a special solvent. Apply it under the edge of the battery and wait 1-2 minutes.
4. Put a blade on the battery and slowly separate it from the body, and if the glue doesn't lend itself, repeat the heat with a hairdryer.

Step 3: Installation of a new battery

Before installing the new battery:

• 🧹 Clean the contacts on the motherboard and battery connector from dust (use a brush or compressed air).
• 🔌 Check if the new battery connector matches the original one (number of pins and location).
• 📏 Make sure the new battery is fit (sometimes the analogues can be 0.5-1mm thicker).

Put the battery back in place, press it down, and connect the plume to the motherboard. If you had double-sided tape, stick it on. If you didn't, use B-7000 glue (spot on the edges).

Step 4: Assembly of the phone

Collect the phone in reverse order:

1. Put all the plumes in their places (photos taken earlier will help!).
2. Stick the back cover. You can use a new adhesive side for reliability (sold in repair kits).
3. So, turn all the stains (not to be worn).

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After assembly, don't turn the phone on immediately. Wait 10-15 minutes for the glue under the lid to grab, and then plug the charger in.

Frequent Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when replacing batteries.

• 🔌 Damage to the battery plume, if you pull the plume out by force, you can pull the contacts off the motherboard. Solution: use a plastic blade and pop the connector on the side instead of the top.
• 🔥 Battery overheating with a hairdryer. Temperature above 70.°C can warp plastic or damage the screen. Solution: Keep the hair dryer 10 cm away and heat no more than 30 seconds in one approach.
• 🧲 Loss of screws. Xiaomi uses screws of different lengths. If you confuse them with places, you can damage the board. Solution: spread the screws in groups (for example, on a sheet of paper with signatures).
• 📉 Low-quality glue. Cheap glue may not hold the battery, and it will hang around inside the case. B-7000 origen.

⚠️ Warning: If the phone doesn't turn on after the battery is replaced, check: Is the battery plume connected correctly (it may seem connected at times, but the contacts don't touch it) or did you damage the display plume or motherboard when disassembling. Does the voltage of the new battery match the original (should be) 3.8V–4.4V). If everything is fine but the phone is not responding, try pressing the power button for 20-30 seconds (sometimes this resets the power controller).

How to prolong the life of a new battery

To make your new battery last longer, follow these rules:

• 🔋 Avoid full discharge. Charge your phone when the charge drops to 15-20%. Full discharge (0%) shortens battery life.
• ⚡ Don't use "cheap" charges. Uncertified chargers can deliver unstable voltages, which damages the battery.
• 🌡️ Keep your phone in the sun or near heat sources (e.g., a torpedo in a car) and the optimum operating temperature is 10-35.°C.
• 📵 Turn off background processes. Applications that are constantly running in the background (such as navigators) quickly drain the battery.
• 🔄 Calibrate the battery. Every 2-3 months, completely discharge the phone (before turning off) and charge up to 100% without interruptions.

We also recommend turning off the Fast Charging feature in settings (Settings → Battery → Fast Charging) if you are in a hurry. It speeds up battery wear by 15-20%.

FAQ: Answers to Frequent Questions