Battery life in Xiaomi smartphones rarely exceeds 2-3 And over time, you'll notice that the phone will run out in a few hours, it will shut down when you're in active use. 20-30% It's a charge or overheating while you're charging, and these symptoms signal that you need to replace the battery. 1500–4000 But with the tools and patience you can do it yourself – saving up to the next few days. 70% cost.
In this article, we will discuss the entire process, from choosing a compatible battery to testing the phone after replacing, describing step-by-step instructions based on the features of popular models (Redmi Note 10 Pro, POCO X3, Mi 11, etc.), listing the necessary tools and warning about typical errors that can cause the phone to fail, and you will learn how to verify the authenticity of the battery and avoid buying fakes.
Signs of battery wear: when is it time to change?
Lithium polymer batteries in Xiaomi smartphones degrade even when used with care, and here are key signs that the battery needs to be replaced:
- 🔋 The phone discharges by 50% or more in 2-3 hours without active use (social networks, instant messengers in the background).
- 🔥 The body warms up noticeably when charging or during games, even if this was not the case before.
- ⚡ Charge jumps: for example, from 40% immediately drops to 15%, or the phone turns off at 20-30% of the remainder.
- 🛑 The device does not turn on without a charge connection, although the indicator shows 10-20% charge.
- ⏳ Full charge time increased to 3-4 hours (with a serviceable power supply and cable).
If you have at least 2-3 items on your Xiaomi list, the battery is worn out, and you can check its condition through the engineering menu: enter the code # #4636## in the Phone app, then select Battery Information. The Battery Health option below 80% is a direct signal to replace.
⚠️ Warning: Don't ignore battery bloating! If the phone's body has deformed and the screen has begun to "step away" from the frame, immediately turn off the device and don't use it.
Battery selection: original vs analogues
The battery quality of the phone is not only the life of the phone, but also the safety of the phone, with three types of Xiaomi batteries on the market in 2026:
| Type of battery | Pluses | Cons | Price (2026) |
|---|---|---|---|
| The original (Xiaomi) | Compatibility guarantee, optimal life (500+ cycles), safety | High cost, risk of running into a fake | 1200–3500 ₽ |
| Licensed analogue (ATL, Sunwoda) | Quality is close to the original, cheaper by 30-40% | The capacity may differ slightly (by 50-100 mAh) | 800–2000 ₽ |
| Uncertified analogue (no-name) | Low price, wide range | Risk of bloating, low resource (200-300 cycles), possible problems with charging | 400–1000 ₽ |
For most Xiaomi models, two companies produce the original batteries: ATL (Amperex Technology Limited) and Sunwoda, whose logos must be on the battery sticker, and check the serial number through the official Xiaomi website or checkmi.com service to avoid counterfeiting.
When buying an analogue, pay attention to:
- 📏 The exact match of the model (for example, for the Redmi Note 9 Pro only fits the model). BM47 or BM48).
- 🔋 Capacity – must match the original (for example, 5020 mAh for POCO X3 NFC).
- 🔌 Availability of a charge controller (the battery board must have a chip).
⚠️ Note: AliExpress batteries priced below 600 ₽ They may have understated capacity or no overheating protection. Only buy from trusted sellers with ratings above 98%.
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Before buying, take a photo of the old battery from both sides – this will help you compare the labeling and contacts with the new battery.
Tools and training required
To replace the battery in Xiaomi, you will need:
New battery (compatibility tested)
Plastic blades or mediators (2-3 pieces)
Screwdriver cross (PH00 or PH0)
Screen suction cup (optional, for models with adhesive display)
Dryer or thermo-air station (for softening the glue)
Thin-ended tweezers
Isopropyl alcohol (90%+) and cotton swabs
Bilateral Scotch or B-7000 glue (for fixing the new battery)
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Also prepare the workplace:
- 🪑 Work at a table with good lighting (ideally a table lamp).
- 🧲 Remove all metal objects (keys, knives) – they can close the contacts of the battery.
- 📱 Turn off the phone completely and remove it. SIM-map + memory-card.
- 🔌 Turn off the phone from charging at least 1 hour before disassembly (the battery should cool down).
If you're taking your smartphone apart for the first time, practice on an old device or watch your model's video disassembly, for example, the Redmi Note 8 Pro and POCO F3 process is different because of the different ways in which the plumes are attached.
What if the phone doesn’t turn on after the breakup?
Step-by-step instructions for replacing the battery
The battery replacement process in most Xiaomi models is similar, but there are nuances. Below is a universal instruction, taking into account the features of popular devices.
1. Removal of the back cover
Most Xiaomi smartphones (e.g. Redmi 9, POCO M3) have a plastic or glass back panel glued to the frame.
- Heat the phone edge with a hair dryer (60–70°C) for 2-3 minutes – this will soften the glue.
- Insert a plastic blade into the gap between the lid and the body (start at the bottom edge where the charging connector is).
- Carefully swipe the perimeter, separating the lid. Do not force - you can damage the plumes!
On models with glass back panels (Mi 11, Redmi K40), be especially careful - the glass may crack. Use a suction cup to lift evenly.
2. Disconnecting the plumes and removing the old battery
After the lid is removed:
- Unscrew the screws that fix the metal plate above the battery (usually 4-6 PH00 screws).
- Unplug the battery plume with tweezers or a plastic spatula.
- If the battery is glued, pull it off the edge and gently pull it up. Bloated batteries can sit tighter -- don't use force to keep it from breaking.
In some models (POCO X3, Redmi Note 10) the battery is attached to double-sided tape, to remove it, pull the special "ears" (pull-tabs) or tuck on the side.
Installation of a new battery
Before installing the new battery:
- 🧹 Clean contacts on your phone and battery with a cotton swab soaked in isopropyl alcohol.
- 🔍 Check if the location of the contacts and connectors coincides.
- 📏 Make sure the new battery is not thicker than the old one (bloated batteries may not fit into the case).
Put the battery back in place and lock it in double-sided tape or B-7000 glue. Connect the power plume and secure the metal plate with screws. Don't pull the screws! -- that could damage the board.
4.Phone assembly
Collect the phone in reverse order:
- Install the back cover and warm it up with a hair dryer (if glue is used).
- Press the lid evenly around the perimeter (you can use a heavy book).
- Turn on your phone and check the battery.
Critically, after replacing the battery in some Xiaomi models (like the Redmi Note 8 Pro), you need to reset the battery controller. To do this, charge the phone to 100%, then discharge to 0% and recharge. This calibrates the charge sensor.
1. Correct connection of the battery plume.
2. Integrity of contacts on the board (possibly oxidation).
3. Compatibility of the new battery with the phone model.-->
Calibration of the battery after replacement
The new battery may show an incorrect charge level for the first few cycles.
- Full Charging: Connect your phone to the original charger and charge to 100%.
- Discharge to 0%: Use your phone as normal until it turns off on its own.
- Recharge: Recharge to 100% without interruption.
- Battery Reset: From the Engineering Menu (#4636###), select Battery Information and click Reset (if available).
After calibration, the charge level will be displayed more accurately. Repeat the procedure after 3-5 charging cycles if the phone discharges quickly.
For models with the function of “Adaptive Charging” (Mi 11, Xiaomi 12) after replacing the battery may require resetting settings in the Settings menu → Battery → Battery settings.
Common Mistakes and How to Avoid Them
Even experienced tycoons sometimes make mistakes when replacing a battery, and here are the most common ones and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Use of metal tools to tamper with battery | Short circuit, board damage | Use only plastic or wooden blades |
| Battery overheating with a hairdryer (above 80°C) | Bloating or ignition of the battery | Keep the hair dryer at a distance of 10-15 cm, use the minimum temperature. |
| Incomplete shutdown of battery plume before retrieval | Damage to the power controller | Always remove the plume with tweezers, not with your fingers. |
| Use of an incompatible battery | The phone is not switched on or charged | Check the battery model by marking on the old one |
| Strong press on the bloated battery | Shell rupture, electrolyte leakage | Remove the bloated battery carefully, wearing protective gloves |
If the phone stopped charging or discharges quickly after replacement, check:
- 🔌 Charging connector contacts - they could oxidize or bend.
- 🔋 Battery plume - it may not be fully inserted into the connector.
- 📱 Power saving settings – sometimes after battery replacement, power profiles are reset.
⚠️ Warning: If after battery replacement the phone starts to overheat or spontaneously shut down, immediately remove the battery! this is a sign of a charge controller malfunction or short circuit.
Replacement cost: self vs service center
Xiaomi’s battery replacement price depends on the phone model, battery type and region, and the cost table for 2026 is below:
| Model phone | Cost of battery (independently) | Cost of service work | Totally in service. |
|---|---|---|---|
| Redmi Note 10 Pro | 900–1500 ₽ | 1000–1500 ₽ | 1900–3000 ₽ |
| POCO X3 NFC | 800–1300 ₽ | 800–1200 ₽ | 1600–2500 ₽ |
| Mi 11 | 1500–2500 ₽ | 1500–2000 ₽ | 3000–4500 ₽ |
| Redmi 9A | 500–900 ₽ | 600–1000 ₽ | 1100–1900 ₽ |
Self-replacement is cheaper, but it takes time and care. If you are not sure about your skills, it is better to contact the service - especially for flagship models (Xiaomi 13, Mix 4), where the risk of damage to the board is higher.
Xiaomi’s service centers will cost 20 to 30 percent more to replace the battery, but you’ll get a warranty (usually 3 to 6 months), while informal workshops will cost less, but no warranty.
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If you decide to change the battery yourself, order spare pull-tabs (sticky "ears" to remove the battery) - they often break when disassembling.