Removing the battery on Xiaomi smartphones is a procedure that can be required when replacing the battery, repairing the motherboard or eliminating the effects of moisture. Unlike older phones with removable covers, modern Redmi, POCO and Mi models have a non-shatterable body, which makes it difficult to access internal components. This article will help you understand how to safely remove the battery without damaging the phone or risking health.
It is important to understand that the wrong actions can lead to damage to the plumes, fire lithium-ion battery or loss of warranty. We will take a detailed look at the necessary tools, device preparation, as well as the nuances for different Xiaomi series – from the budget Redmi Note to the flagship Mi 13. If you are not sure of your abilities, you should contact the service center.
Preparing for battery removal: what to do before disassembly
Before you start disassembling, you need to follow a few critical steps: first, completely turn off the phone and remove the device. SIM-card with memory card (if installed). Second, discharge the battery to 20-30% — It minimizes the risk of fire when contacts are accidentally closed!
Also prepare the workplace:
- 📱 Antistatic mat or at least a table with a wooden surface (metal can cause a circuit).
- 🔧 Set of screwdrivers (cross-haul) PH00, 1.5 mm flat, five-beamed for some models).
- 🧲 Magnetic holder for screws - so as not to lose small details.
- 🔥 Class D fire extinguisher (for lithium-ion batteries) or sand in case of fire.
- 📸 Smartphone to take photos of each step – this will help with the reverse assembly.
If you're disassembling a phone with a battery adhesive attachment (which is most Xiaomi models after 2018), you'll need isopropyl alcohol (90%+) and plastic mediators to tweak it neatly. Don't use metal tools - they can puncture the battery!
⚠️ Warning: If the phone has been in water or shows signs of corrosion, do not attempt to remove the battery yourself. Oxidized contacts can cause a short circuit at the slightest touch.
Tools you need: what to buy and where not to save
The quality of the tools has a direct impact on the success of the operation, with cheap Chinese screwdrivers often licking the screws' slime, and plastic mediators breaking down at the most inopportune moment, and here's the minimum kit that will really help:
| Tool. | Appointment | Recommended brand | Estimated price (2026) |
|---|---|---|---|
| A set of screwdrivers iFixit Pro Tech | Screws of different sizes, magnetic tip | iFixit, WERA | 1 500 — 3 000 ₽ |
| Plastic mediators 0.2 mm | Smacking the battery and plumes without damage | iFixit, X-Torx | 300 — 800 ₽ |
| Thermo-air station or hair dryer 500-600°C | Softening the glue under the battery | Quicko, AOYUE | 2 500 — 10 000 ₽ |
| Suction cup for 50-70 mm screen | Safe removal of the display module | iFixit, Uxcell | 200 — 500 ₽ |
| Nitrile gloves without powder | Protection against static electricity and chemicals | Anymed, Medline | 100 — 300 ₽ |
If the budget is limited, you can do without a thermal air station, but then the process of removing the battery will take 2-3 times longer. Alternatively, some masters use hot air from a hair dryer (maximum temperature!), but it is less safe - it is easy to overheat the board or display.
Critically, never use a knife or metal spatula to tweak the battery. Even a microscopic scratch on a lithium-ion battery can cause bloating or fire in a few days.
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Before buying tools, check compatibility with your Xiaomi model. For example, the POCO F3 will require a five-point screwdriver, and the Redmi Note 10 will require only a cross-mounted PH00.
Step-by-step: how to remove the battery on Xiaomi (universal method)
This guide is suitable for most Xiaomi models from 2019-2026 (including Redmi Note 11/12, POCO X4, Mi 11 Lite). For older devices (until 2018) or flagships (Mi 13 Ultra) there may be nuances - we will consider them separately.
- Remove the back cover. Dry dryer the edge of the phone (30 seconds on each side) at 80-90°C. Carefully apply the cover with a plastic mediator, starting at the position near the charging connector. If the cover does not respond, warm up again.
- Turn off the battery plume. When you take the lid off, you'll see a metal plate covering the battery connector, unscrew it, and gently unplug the plume with a plastic blade. Don't pull the wires!
- Heat and remove the battery. Put the phone on a flat surface with the screen down. Put a few drops of isopropyl alcohol under the battery (through the slits) and wait 2-3 minutes. Then gently tuck the battery into the mediator starting at the corner. If the glue does not respond, repeat the heater (60-70 °C).
- Clean glue residue. After the battery is removed, remove the glue residue from the case with alcohol and a napkin without pile. For the new battery, use 3M double-sided tape or B-7000 special glue.
If the battery is swelling, don't try to puncture or bend it. Put the phone in a fireproof container (like a metal bucket of sand) and call the service. Bloated batteries are extremely dangerous!
Is the phone off the grid?|Is it cut? SIM-map?|Is the battery discharged to 20-30%?|Are the tools and fire extinguisher ready?|Is the location of the plumes photographed?-->
Features of battery removal on popular Xiaomi models
Despite the similarity in design, some Xiaomi models have unique nuances.
Redmi Note 10 / 11 / 12 Series
In these models, the battery is attached to a very strong glue, so you can't do without heating. The special feature is an additional metal plate above the battery, which you need to remove after the plume is turned off. The screws here are PH00, but one of them (near the camera) may be longer than the others - don't lose it!
POCO X3 / X4 / X5
In the POCO X series, there are often five-point screws (called Pentalobe) that you can't unscrew without a special screwdriver! And there are two plates above the battery, and you can keep the top one if you're just changing the battery.
Mi 11 / 12 / 13
The flagship models have a modular battery design (two batteries connected in parallel) and need to be removed one by one, starting with the top one. There's also an additional temperature sensor that attaches to the battery -- don't tear its plume!
Redmi 9 / 9A / 9C
Budget models are easier to disassemble, but there's a catch: the battery plume is glued to the body. It needs to be carefully tucked in, otherwise you can tear the contacts off. The screws here are PH00, but some may be jammed — don't apply excessive force.
To determine the exact model of the battery, use the label on the old battery. It usually begins with the letters. BM (for example, BM41 The new battery should have the same capacity and voltage (usually) 3.85V or 4.4V).
What do you do if the screw is licked?
Frequent Mistakes and How to Avoid Them
Even experienced wizards sometimes make mistakes when working with Xiaomi batteries, and here are the most common ones and ways to prevent them:
- 🔥 If you heat the body too long with a hairdryer, you can melt the plumes or damage the chips — 80-90°C, no more. 30 one-place.
- ⚡ Close contacts. Always turn off the battery plume first and plug in last. Even a discharged battery can spark when it comes into contact with metal.
- 🔧 Loss of screws.Strotters in Xiaomi often vary in length.Save them in a magnetic table or signed containers.For example, camera screws are usually shorter than motherboard screws.
- 📱 Display damage. When you remove the back cover, don't put the mediator too deep, you can tear the screen plume. It's better to heat longer, but more carefully.
- 🔋 Using the wrong battery. The Redmi Note 11 battery won't work. POCO X4, Even if they look similar, always check the markings!
⚠️ Attention: If the phone doesn't turn on after you take off the battery, check the fuse on the motherboard (usually next to the charging connector) and it can be replaced with a soldering iron, but it requires experience.
Another typical problem is the memory effect of a new battery: to avoid it, run 3 full charge/discharge cycles after installation, charge the phone to 100%, then discharge until it is automatically turned off.
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The most common reason a new battery fails is because the plume is not installed correctly, so make sure the connector snaps to the characteristic click.
What to do after removing the battery: installation and calibration
It's only half the battle to get the battery out of the system, and it's just as important to get the new battery installed and calibrated so that the system correctly displays the charge level.
- Clean contacts. Wipe the battery connector and the circuit board connector with isopropyl alcohol. Oxidized contacts can cause charging problems.
- Install a new battery. Put the battery back in place carefully, making sure the plume is not twisted. Stick it with double-sided tape or special glue. Don't use superglue!
- Connect the plume. Connect the battery connector to the circuit board connector. It should snap with a click. If the connector is hanging, check if the contacts are bent.
- First turn on. Connect your phone to charge and wait for the charge indicator to show up.
- Calibrate the battery. Charge the phone fully, then discharge it until it's turned off. Repeat the cycle 2-3 times, which will help the power controller determine the level of charge more accurately.
If the phone does not turn on after replacing the battery, check:
- Is the battery plume connected correctly (sometimes it flies off during assembly).
- Is the charger damaged (try another charger)?
- Has the protective mode worked (wait 10-15 minutes and try to turn it on again)?
In some models (for example, Mi 11 Ultra) after the battery replacement, you may need to reset your settings via Fastboot.
fastboot erase userdata
fastboot erase cache
fastboot rebootWhen it is better to contact the service: signs of a difficult case
Despite the detailed instructions, there are situations where self-repair is impractical or even dangerous.
- 🔥 Battery swollen or deformed - the risk of fire is too high.
- 💧 The phone was in the water, and on the board visible traces of corrosion.
- ⚡ After replacing the battery, the phone does not hold the charge (discharges for the battery). 1-2 hour).
- 🔧 The screws or connectors are damaged and you can't reassemble the phone back.
- 📱 Artifacts or stripes appeared on the screen after disassembly (display plume is damaged).
- 🔋 New battery heated over 50°C when charging.
The cost of replacing the battery in the service varies from 1,500 ₽ (for Redmi 9A) up to 5,000 ₽ (However, this includes a work warranty and an original battery, and if you replace it yourself, you risk losing your phone warranty (if it is still valid).
⚠️ Note: If you bought a battery on AliExpress or Wildberries at a suspiciously low price (e.g., if you bought a battery on AliExpress or Wildberries, 500 ₽ For the Redmi Note 11), It's probably a fake. These batteries often have real capacity. 30-50% below the stated and may be swelled through 2-3 month.
Before visiting the service, check whether your phone is running a battery exchange program from Xiaomi. For example, in 2026, for the Mi 11 and Mi 12 models, there is a discount of up to 50% on the original battery when you contact authorized centers.