The Xiaomi Mi A1 is the iconic 2017 smartphone that is still in use by many users, but over time, even the best battery loses capacity: the phone starts to run out in a few hours, turns off at 20-30% charge or refuses to turn on without charging. If you are faced with these problems, it is time to think about replacing the battery.
In this article, we will discuss how to change the battery to the Mi A1 with your own hands, from choosing a new battery to the final assembly of the device. You will learn what tools you will need, how to avoid common errors and what to do if the phone does not turn on after replacing, and we will compare the prices of original and analog batteries, consider options with a call to the service center and give recommendations for extending the life of the new battery.
Important: the procedure requires accuracy and basic electronics skills. If you have never disassembled smartphones, it is better to entrust the replacement to professionals - errors in dismantling can damage the plumes or motherboard.
Signs that Xiaomi Mi A1 battery needs replacement
How do you know if your battery has run out of life and needs to be replaced?
- 🔋 Phone's running out of power. 2-3 hours with moderate use (social networks, instant messengers).
- 🔌 Charging is held only when connected to the network - it is enough to disconnect the cable, and the smartphone turns off.
- 📉 The percentage of charge jumps: for example, from 40% immediately drops to 15%, or the phone shows 100%, but after 5 minutes it is 80%.
- 🔥 The battery swelled - this is noticeable by the raised back cover or the increased gap between the screen and the case.
- ⚡ The smartphone overheats while charging or running, even if heavy applications are not running.
- 🛑 The device turns off at low temperatures (such as outside in winter) and does not turn on until it warms up.
If you see at least 2-3 signs from the list, the probability of battery wear is 90%, and you can check the status of the battery using applications like AccuBattery (showing real capacity) or through the engineering menu (enter code ##4636## and select Battery Information).
⚠️ Warning: a bloated battery is dangerous! it can damage the motherboard or even ignite.If the phone's body is deformed, immediately disconnect it from charging and do not use it until the battery is replaced.
What battery to choose for Xiaomi Mi A1: original vs analogues
There are three types of batteries available on the market for the Mi A1:
- Original (Xiaomi) - manufactured in the factories of ATL or Sunwoda on behalf of Xiaomi. They are labeled BM44 or BM47, capacity 3080 mAh, voltage 3.85V. Guaranteed compatible with the phone, but are more expensive than their counterparts.
- The premium analogues are batteries from proven brands (Baseus, Remax, Patona) and have similar characteristics, but may vary slightly in time.
- Budget-friendly analogues are cheap batteries without a brand (often sold as “original”), with low quality and rapid wear and tear.
| Type of battery | Capacity | Price (2026) | Pluses | Cons |
|---|---|---|---|---|
| The original Xiaomi | 3080 mAh | 1 800 — 2 500 ₽ | 100% compatibility, long service life | High price, difficult to find on sale |
| Baseus/Remax | 3000–3200 mAh | 1 200 — 1 600 ₽ | Good quality, affordable price | Maybe it's a little different working hours. |
| Nameless analogue | 2800-3000 mAh | 600 — 1 000 ₽ | Low price | Risk of rapid wear, possible problems with charging |
Where to buy:
- 🛒 Xiaomi's official stores (original batteries).
- 🌍 AliExpress, Amazon – a wide range of analogues, but check reviews.
- 🔧 Radio parts stores or service centers (you can bring an old battery for comparison).
Critically, the new battery should have the same capacity (3080 mAh) and voltage (3.85V) as the original, and batteries with different parameters can damage the smartphone's power controller.
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Before buying, check the date of battery production (indicated on the label). The optimal age is no older than 6 months. Old batteries lose capacity even in the package.
Preparing for replacement: security tools and measures
To replace the battery on Xiaomi Mi A1 you will need:
- 🔧 Screwdriver kit: cross-haired (PH00) flat (1.5 mm).
- 📱 Plastic blades or mediators for disengaging the body.
- 🔥 Hair dryer or thermo-air station (for softening glue).
- 🧲 Magnetic mat or screw tray.
- 🛠️ Suction (to take the screen off).
- 🧴 Isopropyl alcohol (90%+) clean-up.
- 🔋 New battery (check before installation!).
Also prepare the workplace:
- 🪑 Clean table with good lighting.
- ⚡ Antistatic bracelet (or ground by touching a metal object).
- 📸 Take a picture of the disassembly process – this will help to properly assemble the phone back.
⚠️ Warning: Do not use metal tools to unplug plumes, this can damage the contacts. If you do not have plastic shoulder blades, wrap the screwdriver with a seal.
Turn off the phone and remove it. SIM-map|Discharge the battery before 20-30% (reduces the risk of fire)|Prepare all the tools and a new battery|Check the performance of the new battery with a multimeter (optional)|Remove the case and clean the case of dust-->
Step-by-step: how to disassemble the Xiaomi Mi A1 and replace the battery
The process of replacing the battery consists of several steps. Follow the instructions carefully so as not to damage the plumes or board.
Step 1: Removing the back cover
Xiaomi Mi A1 has a non-shattered body glued around the perimeter.
- Heat the phone edge with a hair dryer (the temperature is ~60°C) for 2-3 minutes – this will soften the glue.
- Place the suction cup on the bottom of the screen and pull up.
- Insert a plastic blade into the resulting gap and carefully lead it around the perimeter, separating the lid.
If the lid doesn't respond, repeat the heat. Don't use excessive force, you can damage the fingerprint scanner plume.
Step 2: Battery disconnection
After the lid is removed:
- Unscrew 10 screws that fix the metal plate (use a magnetic mat to avoid losing them).
- Take the plate off carefully and put it aside.
- Unplug the battery plume with a plastic spatula.
Step 3: Remove the old battery
The battery in the Mi A1 is glued to the body to remove it.
- Put a plastic shoulder blade on the battery from any angle.
- Put a thin guitar string or plastic card under it.
- Slowly drive the string under the battery, cutting the glue.
If the battery is swollen, act especially carefully - the risk of damage is high.
Step 4: Installation of a new battery
Before installation:
- Clean contacts on your phone and new battery with isopropyl alcohol.
- Remove the protective film with the adhesive side of the battery.
- Carefully press the battery against the body, starting at the top edge.
- Connect the power plume and fix it.
Step 5: Assembly of the phone
Collect the phone in reverse order:
- Set a metal plate and twist the screws.
- Stick the back cover. You can use double-sided tape or B-7000 glue for reliability.
- Press the lid and leave the phone under load (such as a book) for 10-15 minutes.
After assembly, connect the phone to charge and check if the new battery recognizes. If the phone doesn't turn on, check the plumes.
What if the phone doesn’t turn on after the replacement?
Frequent battery replacement errors and how to avoid them
Even the most experienced craftsmen sometimes make mistakes that cause the phone to break down.
- 🔧 The fingerprint scanner plume is damaged when you're not taking the lid off properly. Solution: use plastic tools and take your time.
- 🔥 Battery puncture -- a bloated battery is easy to puncture. Solution: cut the glue slowly, without pressing.
- 📱 Incorrect installation of the metal plate - screws can close contacts. Solution: check the location of the plate before tightening.
- 🔌 Using an incompatible battery causes rapid wear and tear or damage to the controller.Solution: Buy a battery with the same parameters as the original.
- 🧲 Loss of screws - Mi A1 Solution: use a magnetic mat and sort them into groups.
If you're in doubt, you should go to the service. The average cost of replacing a battery in a workshop is 1,500-2,500. ₽ (with the original battery and the original battery).
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The most common failure in self-replacement is damage to the fingerprint scanner plume, and if the sensor doesn't work after assembly, it's likely that the plume is torn off or bent.
How long will the new battery last and how to extend its life
The life of a new battery depends on several factors:
| Factor. | Resource impact | Recommendations |
|---|---|---|
| Battery quality | The original lasts 2-3 years, cheap analogue – 6-12 months | Choose proven brands (Baseus, Patona) |
| Charging mode | Continuous charging up to 100% reduces the service life | Keep the charge in the range of 20-80% |
| Temperature. | Overheating or cold accelerates degradation | Do not leave your phone in the sun or in the cold. |
| Use of the | Games and heavy applications increase the load | Close the background processes, use the energy saving mode |
To maximize the life of the new battery:
- 🔋 Use an original or certified charger (current no more than) 2A).
- 📵 Avoid full discharge - connect charging when 15-20%.
- 🌡️ Do not use your phone while charging (especially for gaming).
- 🔄 Calibrate once every 3 months: completely discharge and charge your phone.
With proper operation, the new battery will last 2-3 years without a noticeable loss of capacity.