Replacing the battery with Xiaomi Redmi: a complete guide with photos and videos

When is the time to change the battery to Xiaomi Redmi?

Xiaomi Redmi smartphones are known for their durability, but even the best batteries lose capacity over time. If your device starts to run out in a few hours, spontaneously turn off at 20-30% charge or overheat during charging are sure signs of battery wear. The average life of lithium-ion batteries is 2-3 years (or 500-800 charging cycles), after which the capacity drops by 30-50%.

The problem is particularly acute for the Redmi Note 8/9/10/11 and Redmi 9A/9C models, which were mass-produced in 2020-2022, which often face battery bloating due to defects in the charge controller in early batches. If the phone body starts to “splash” or the screen rises, the replacement should be done immediately, as it is dangerous for safety.

Before you start repairing, check the battery status through the engineering menu: ##4636## → Battery information. The wear level above 25% or capacity below 80% of nominal value is a direct signal to replace.

Which battery to replace?

Choosing the right battery for Xiaomi Redmi is half the success. Xiaomi’s original batteries are labeled with a code that starts with MB (like the MB01 for the Redmi Note 9 Pro). They can be bought from official distributors, but the price is often overpriced. The alternative is certified counterparts from ZMI, Baseus or Remax, which are cheaper by 30-40%, but not inferior in quality.

Here are the key parameters that should be considered:

• 🔋 Capacity: Must match the original (e.g., 5020 mAh for Redmi Note 10 Pro) overcapacity batteries (6000)+ MACh is often a fake.
• 🔧 Type of connector: new models (Redmi) 12/13) plume 4 with old contacts (Redmi) 8/9) — s 3.
• 📏 Dimensions: even a millimeter mismatch will lead to the fact that the lid will not stand in place.
• 🛡️ Protection: availability of charge controller and thermal sensor (marking) PCB case).

Beware of counterfeits! There are many batteries on the market with an "Original" sticker that actually have a capacity 2-3 times lower than the declared one. Check the seller: he must have certificates of conformity and a warranty of at least 6 months.

Battery replacement tools

To replace the battery on Xiaomi Redmi, you will need a minimum set of tools. Without them, the risk of damage to the plumes or the case increases significantly.

If you've never taken a smartphone apart, practice on an old phone or watch your model disassembly on YouTube. For example, the Redmi Note 10 Pro has a nuance: the fingerprint scanner plume is glued to the battery, which is easy to tear when taken carelessly.

⚠️ Warning: Do not use metal blades or knives to separate the body! They can close contacts on the board or scratch the screen.

Step-by-step instructions for replacing the battery

The process of replacing the battery with Xiaomi Redmi takes 30-60 minutes, if you act carefully. We will analyze the universal algorithm that is suitable for most models (Note 8/9/10/11, Redmi 9A/9C, etc.). There are some nuances for Redmi 12/13 - they are listed in the spoiler below.

Step 1: Turning off and preparing the phone

• 🔌 Discharge your phone (up to 0%) and turn it off.This minimizes the risk of short circuit.
• 🔧 Take out the tray for SIM-Cards - it can interfere with the disassembly.
• 🔥 Heat the back cover with a hair dryer (60-80°C) perimeter 1-2 minutes to soften the glue.

Step 2. Remove the back cover

• 🧲 Suction lift the lid at the charging connector (there is usually weaker glue).
• 📱 Insert a plastic mediator into the resulting gap and carefully lead along the case, separating the cover.
• ⚠️ Do not apply force - if the lid does not lend itself, warm up again.

Step 3. Shutting down the battery

• 🔌 Unscrew. 2-3 screws fixing the metal plate on the battery plume.
• 🛠️ Carefully tuck the plume with the mediator and disconnect it from the motherboard.
• 🔋 If the battery is swelling, don't try to prick it.

Check the polarity of the plume (red wire - "+")

Clean the contacts with alcohol

Make sure the new battery is of the same capacity

Warm up double-sided scotch for better fixation-->

Step 4: Installation of a new battery

Before you install a new battery, remove the remnants of the old glue from the case with isopropyl alcohol. The new battery usually comes with double-sided tape -- remove the protective film gradually, sticking the battery from one edge to the other.

1. Connect the plume to the motherboard (should be a click).
2. Secure the metal plate with screws.
3. Check that the battery is flat and does not press on the plumes.

Step 5: Build the phone

Make sure all the plumes (screen, camera, power button) are connected correctly. Close the back cover starting at the top and press it tightly around the perimeter. Turn on the phone and check:

• 🔋 Charging is stable (without percentage jumps).
• 📱 The body doesn't warm or creak.
• 🔌 Type-C connector works (sometimes contacts oxidize after disassembly).

1) Correct connection of the battery plume (try reconnecting).

(2) Integrity of motherboard contacts (possibly oxidation).

3) Condition of the fuse on the board (multimeter diagnostics required).-->

Frequent Mistakes and How to Avoid Them

Even experienced tycoons sometimes make mistakes when replacing batteries, and here are the most common mistakes and ways to prevent them:

⚠️ Note: If the battery is discharged after replacement 1-2 You probably bought a fake with an understated capacity. Check the actual capacity through the AccuBattery app).

• 🔥 Overheating with a hair dryer: temperature above 80°C can damage the screen or board. Use thermocouples or an infrared thermometer to monitor.
• 🔌 The break of the fingerprint scanner plume: in the Redmi Note 9/10 It goes on top of the battery. Unstick the battery slowly, with a mediator.
• 📉 Incorrect calibration: after replacing the battery 2-3 Once completely discharge and charge the phone so that the controller correctly determines the capacity.
• 🛠️ Loss of screws: Redmi uses screws of different sizes (e.g., lid and motherboard) and store them in separate containers.

Another common problem is that the phone doesn't see the new battery, and it's because of a failure in the power controller.

1. Turn off the phone from charging.
2. Press the power button for 20-30 seconds (reset the residual charge).
3. Connect the charger and try to turn it on.

💡

If the battery swells in a week after the replacement, it is a defect or a wrong installation.

Replacement cost: with your own hands vs service

The price of a Xiaomi Redmi battery replacement depends on the model, battery type and repair method, and the average cost in Russia in 2026 is as follows:

Self-replacement is more profitable 50-70%, But only if you have the experience and the tools, and they give you a warranty (usually). 3-6 You can do it yourself, and if you repair it yourself, you can take all the risks, for example, if you damage the plume of the screen, it will cost you to replace it. 3000-5000 ₽.

Where to buy a cheaper battery?

• 🌍 AliExpress: Prices are lower 30-40%, but delivery 2-4 Look for rated sellers. 98%+ photo-reviewed.
• 🏬 Local shops: "Svyaznoy", "MVideo", "DNS" — Original batteries, but more expensive.
• 🔧 Service centers: sometimes sell parts wholesale at a discount.

What to do after replacing the battery?

Successful battery replacement is only half the battle, and to make a new battery last longer, you need to run it right and keep an eye on the operating conditions, and this is what you should do in the early days:

• 🔋 Sizing: 2-3 Once completely discharge the phone (before switching off) and charge to 100% breaklessly.
• 📊 Health check: Install AccuBattery and track the actual capacity. 95-100% from the declared.
• 🔌 Charging: Use the original power supply (e.g. for the Redmi Note 10 Pro — 33W). Fast charging from third-party manufacturers could shorten lifespan.
• 🌡️ Temperature: Do not leave your phone in the sun or near heat sources — 10-35°C.

If you notice that the battery is going down too quickly after 1-2 weeks after the replacement, check:

• 🔍 Background processes: in Settings → Battery see which applications consume the charge.
• 📶 Network: weak signal 4G/5G It increases the flow rate. Try switching to 3G customized SIM-map.
• 🔄 Updates: Sometimes firmware MIUI It contains battery-eating bugs. Check the version in Settings. → The phone.

⚠️ Warning: If a new battery starts to swell in the first months, it's a sign of defective or improper installation. Don't ignore it! A bloated battery can damage the screen or even ignite.

FAQ: Answers to Frequent Questions