Have you noticed that your Xiaomi battery is running out too quickly and you're thinking about replacing it with a larger battery? Or, conversely, you want to install a smaller battery to lighten the case? In this article, we'll look at whether you can physically resize the battery on Xiaomi devices, what models support it, and what you need to know before you start the procedure.
Xiaomi smartphones (including Redmi sub-brands, POCO, Black Shark has non-removable batteries, but that doesn't mean they can't be replaced. The main question is compatibility: can you install a different battery without disrupting the device? The answer depends on the model, the type of case, and even the firmware version. 11T The Pro could theoretically be 6,000mAh instead of 5,000mAh, but it would require modifications to the body and could cause overheating. POCO Originally available with the option of replaceable batteries (for example, POCO M3 Pro with modular back cover).
It's important to understand that resizing a battery is a hardware intervention that can take away warranty, cause charging problems, or even damage the motherboard. Before you start, check out the risk section and see if your model is suitable for such experiments. If the goal is simply to extend the running time, it may be worth considering alternative ways to avoid disassembling the phone.
What Xiaomi models can change the size of the battery?
Not all Xiaomi smartphones are equally battery friendly, and here are the key criteria by which to determine whether a replacement is possible:
- 🔧 Modular design: models with removable back cover (for example, Redmi) 4X, Redmi Note 5, POCO M2) It's easier to disassemble. They have a battery attached to glue, but you can carefully separate it.
- 📏 Backup space in the case: Some flagships (such as the Xiaomi Mi 10 Ultra) have room for a thicker battery, but this requires accurate measurements.
- ⚡ Support for fast charging: if the phone supports 120W or 200W charging (like the Xiaomi 13 Pro), installing a larger battery may require changing the power controller settings.
- 🛠️ Availability of service manuals: for popular models (for example, Redmi Note 10 Pro) in the network there are disassembly schemes and recommendations for compatible batteries.
Below is a table of models that have been confirmed to be able to replace the battery with an alternative battery (with increasing or decreasing capacity), based on user reports and service centers:
| Model | Standard capacity | Max. Compatible capacity. | Notes |
|---|---|---|---|
| Xiaomi Redmi Note 8 Pro | 4500 mAh | 6,000 mAh | Requires replacement of the heat pad and modification of the cover |
| POCO X3 Pro | 5160 mAh | 7,000 mAh | Possible overheating with intense load |
| Xiaomi Mi 9T | 4000 mAh | 5,000 mAh | You need to update the firmware to correctly display the charge |
| Redmi 9A | 5,000 mAh | 4000 mAh | Reducing capacity is possible without modifications |
⚠️ Note: even if your model is in the table, it does not guarantee 100% success. POCO F3 Users successfully installed 6,000mAh batteries, but lost support for wireless charging. Always check the reviews on forums (e.g., for example, 4PDA or XDA Developers) before buying a new battery.
What tools will you need to replace?
If you decide to replace, prepare the following set of tools, without which the risk of damage to the phone or battery increases significantly:
- 🔨 Plastic blades (for careful separation of the lid and plumes). Metal tools can scratch the body or close contacts.
- 🔥 Hair dryer or thermo-air station (for softening the glue) Optimal temperature is 60-80°C. Overheating over 100°C may damage the display.
- 🧲 Magnetic screwdriver (for screws) T3, T4, T5). Some models (such as Xiaomi 12) use screws with unscrew protection – you will need a special bit.
- 🔋 Multimeter (to check the voltage of the new battery before installation) Normal voltage for Li-Pol battery is 3.7–4.4V.
- 🧴 Isopropyl alcohol (90%+) (Do not use acetone, it can damage plastic parts!
- 🛡️ Protective gloves and glasses. Lithium batteries can ignite if damaged.
You will also need a new battery, and only buy it from trusted suppliers (e.g. AliExpress with a sales rating above 98% or specialty stores like BatteryUp).
- 📌 Exact matching of connector (for example, JST 2.0 or Hirose. mismatch can lead to short circuit.
- 📏 Dimensions (length/width/thickness) Permissible deviation — ±0.5 mm.
- 🔄 Charge controllers, batteries without built-in batteries. BMS (Battery Management System is incompatible with Xiaomi.
Turn off the phone and remove it. SIM-map|Make a backup copy of the data|Charge the old battery to 30-50%|Prepare the workplace (clean surface, good lighting)|Check out the new multimeter battery-->
Step-by-step instructions for replacing the battery
The replacement process can be divided into 5 key steps, followed strictly in order to avoid errors. The following instruction is universal, but for specific models (for example, Xiaomi 13 Lite) additional steps may be required.
Step 1: Disassembly of the hull
- Turn off the phone and wait 5-10 minutes (to drain the capacitors).
- Heat the back cover around the perimeter for 2-3 minutes. Start at the bottom edge (where the glue is usually located).
- Put a plastic blade in the gap between the lid and the body. Carefully drive it along the edge, separating the glue. Don't force it on Xiaomi. 12S The Ultra display is attached to the cover with double-sided tape and is easily damaged.
- Remove the lid and put it aside. In some models (like the Redmi Note 11), there is a metal plate under the lid, which must be carefully removed.
Step 2: Disconnect the old battery
- Unscrew the screws that fix the metal plate above the battery (if any).
- Carefully disconnect the battery plume from the motherboard. Use a plastic blade to avoid damaging the contacts.
- Check the voltage on the battery contacts with a multimeter. 3.0V, Don’t try to charge it, it’s dangerous!
Step 3: Remove the old battery
This is the most critical stage. The battery is glued to the body, and it needs to be carefully separated.
- Put the isopropyl alcohol under the battery (between the battery and the body) and it will dissolve the glue.
- Wait 5-10 minutes, then gently tuck the battery in with a plastic card. Don't use metal tools!
- If the battery fails, repeat the procedure with a heater (not higher than 80).°C).
- Once removed, inspect the case for any glue residues. Remove them with alcohol.
What to do if the battery is blown?
Step 4: Installation of a new battery
- Check the new battery for damage, make sure it's within 3.7–4.2V.
- Apply a thin layer of new bilateral scotch (for example, 3M 9448A) hull-mounted.
- Carefully install the battery, avoiding distortions. Press it evenly throughout the area.
- Connect the plume to the motherboard, make sure the contacts match.
Step 5: Assembly and testing
- Set the metal plate (if any) in place and twist the screws.
- Stick the back cover. You can use glue for reliability. B-7000 (squirt).
- Turn on your phone and check: Is the charge level displayed correctly, is fast charging working (if supported), is there overheating in the first hours of operation.
⚠️ Warning: After the battery is replaced, the phone may show an incorrect percentage of charge, due to the fact that the power controller does not know the parameters of the new battery:
- Completely discharge the phone before turning off.
- Charge it to 100% without interruption.
- Repeat the cycle 2-3 times.
1) Is the battery plume properly connected (it may sometimes move slightly during assembly).
(2) Is there a circuit on the motherboard (see for darkening or burning smell).
3) Whether the new battery is compatible in voltage (e.g, 3.85V instead 3.7V may not be supported).-->
Risks and possible problems
Replacing the battery with Xiaomi is not a harmless procedure. Even if you follow the instructions, there are risks you should be aware of in advance:
- 🔥 Fire or explosion: Lithium batteries are sensitive to mechanical damage; if punctured or bent strongly, they can ignite; always keep a Class D (metal) fire extinguisher or sand on hand.
- ⚡ Short circuit. If you accidentally close the battery contacts when you install it, it can disable the motherboard. Symptoms: the phone doesn't turn on, it warms up when you charge, or it snags.
- 📉 Performance decline: Some models (e.g. Xiaomi 12 Pro) automatically limit performance when a non-original battery is detected.
- 🚫 Loss of warranty. Any opening of the case will void the Xiaomi warranty. Even if the problem is not related to the battery (for example, a broken speaker), the service may be denied repairs.
- 🔄 If the new battery has a different voltage or cutoff current, the phone can: Do not charge above 80%. Show "Charge suspended" at high temperatures. Shut off at 20 to 30% charge.
To minimize the risks, follow these rules:
- 🛠️ Work on an antistatic mat or grounded table.
- 🔋 Do not use batteries from other brands (such as Samsung or Huawei), even if they are of the same size.
- 📱 After replacing, check the phone with AccuBattery (available on Google Play) to show the actual capacity and battery status.
💡
If you are not sure about your skills, it is better to contact the service center.The cost of replacing the battery in the official Xiaomi service is 1500-4000 rubles (depending on the model), which is often cheaper than repairing after a failed self-replacement.
Alternatives to replacing a battery: how to extend its life?
If the goal is simply to increase the battery life, you don’t always need to change the battery. Here are 5 proven ways to extend the battery life without disassembling:
- 🔄 Battery calibration. Sometimes the phone shows the wrong percentage of charge due to a controller failure. To reset data: Fully discharge the phone before you turn it off. Charge to 100% without interruption. Turn off charging and turn on the phone. If it's below 100%, add it to maximum.
Optimizing charging
Adaptive Charging
Battery Saver
Xiaomi
MIUI 14
Background cleanup
TikTok
Google Maps
Settings → Battery
Temperature monitoring
Xiaomi
- Charge in the sun.
- Use your phone while charging (especially for gaming)
- Keeping your phone near heat sources (such as in a car in the summer)
Use of external batteries
power bank
Xiaomi
Mi Power Bank 3 20000mAh
If the battery has already degraded (capacity has fallen below 70% of its face value), then alternatives will not help - it will need a replacement.
adb shell dumpsys batteryLook for the health parameter. A value of 2 means that the battery needs to be replaced.
Features of battery replacement on popular Xiaomi models
Each Xiaomi model has its own nuances when replacing the battery, below is a brief overview for the most common devices:
| Model | Difficulty of replacement (1-10) | Features | Recommended capacity |
|---|---|---|---|
| Redmi Note 10 Pro | 6 | It requires the camera plume to be soldered off. The battery is glued very tightly. | 5000–6,000 mAh |
| POCO X3 NFC | 4 | Easy access to the battery, but it's hard to unplug the plume without tweezers. | 5160-7000 mAh |
| Xiaomi Mi 11 | 8 | Fragile display glued to the body, risk of damage during disassembly. | 4600-5500 mAh |
| Redmi 9C | 3 | Simple design, the battery is attached to 4 screws. | 5000–6,000 mAh |
| Black Shark 4 | 7 | Additional heat pads, cooler reconnection required. | 4500-5000 mAh |
For flagship models (such as Xiaomi 13 Ultra), battery replacement is complicated by the presence of:
- 🔧 Additional sensors (e.g., Hall sensor for wireless charging).
- 🛡️ Protective glass that can crack when disassembled.
- 🔌 Multi-layered plumes that are easily damaged.
If your model is not in the table, look for a disassembly on YouTube for "battery replacement phone model." POCO F4 GT There are detailed videos marked "teardown".