Replacement of the battery on Xiaomi Mi Max 3: detailed instructions with photos and videos

Xiaomi Mi Max 3

Many owners are afraid to disassemble their phone for fear of damaging the plumes or display, but the procedure for replacing the battery with the Mi Max 3 is easier than it seems, provided you follow clear instructions and use the right tools. In this article, we will discuss the entire process from fault diagnosis to final assembly, and also tell you how to choose a quality battery and avoid typical errors.

If you've never repaired a smartphone before, don't worry: the Xiaomi Mi Max 3 is one of the most maintainable models in the lineup. Its body is not glued dead like flagships, and the battery is not soldered to the board, which makes it easier to replace, the main thing is patience and accuracy.

How do you know if the Xiaomi Mi Max 3 battery needs to be replaced?

Before you start the screwdriver, make sure the battery is the problem. Here are the key signs of wear and tear:

• 🔋 Phone's running out of power. 3-4 One hour with moderate use (previously kept the day).
• 🔥 The body heats up strongly during charging or playing.
• ⚡ Charge jumps (for example, from 50% immediately drops to 15%).
• 🛑 The device is switched off when 20-30% The indicator shows the remaining.
• 🐢 Long charging (more than 4 hours from 0 to 100%).
• 📉 Settings menu → Battery → The battery state of the container shows less 70-80% starting-point.

If at least 2-3 The battery needs to be replaced, but before repairing it, check if the software is to blame: upgrade your smartphone to the latest version. MIUI, Reset the battery settings (Settings) → Annexes → Application management → Three points. → Reset battery settings) and calibrate the charge (fully discharge, then charge to 100% breaklessly).

⚠️ Warning: If the phone is swollen (the body or screen is raised), DO NOT try to disassemble it yourself - risk of fire.

What tools will you need to replace?

To replace the battery with the Mi Max 3, you don't need professional gear -- a basic set is enough.

If you don’t want to assemble tools separately, buy a ready-made smartphone repair kit on AliExpress or in local stores (costs 300-800 rubles), which usually includes all the necessary screwdrivers, shoulder blades and suction cup.

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Before disassembly, take a picture of the location of screws and plumes at each stage - this will greatly simplify the reverse assembly.

What battery to choose for Xiaomi Mi Max 3?

The original battery in the Mi Max 3 has a capacity of 5500 mAh and the marking BM4H. When choosing a replacement, pay attention to:

• 🔄 Capacity: Optimal - 5500 mAh (do not take less than 5000 mAh, otherwise the operating time will be reduced).
• 🏷️ Marking: Must match the original (BM4H or DM-BM4H).
• 🔋 Type: Li-Pol (Li-Polymer) only, voltage 3.85V.
• 🛡️ Protection: A charge/discharge controller (usually built into the battery).
• 📦 Set: The set should be adhesive tape and insulation film.

Where to buy:

• 🌍 AliExpress: Xiaomi Mi Store Official, HQRP or BASEUS (price 800-1500 ruble.).
• 🏬 Local stores: Search for "battery for Xiaomi Mi Max 3" BM4H».
• 🔧 Service centers: You can buy them (expensive, but quality guarantee).

⚠️ Avoid batteries without labeling or with suspiciously low price (less) 600 These batteries often have a real capacity in 2-3 less than the stated and can swell in a month.

Step-by-step: how to change the battery on Xiaomi Mi Max 3

Before starting work, turn off the phone and remove it. SIM-Work on a clean desk with good lighting.

Turn off the phone and remove the tray SIM-map|Prepare all tools|Wear an antistatic bracelet (or touch a grounded object)|Put the phone on a soft surface (such as a napkin)|Photograph the initial state of screws and plumes-->

Step 1: Removing the back cover

The back of the Mi Max 3 is mounted on the latches and glue to remove it.

1. Heat the edge of the body with a hairdryer (especially near the buttons and USB connector) for 1-2 minutes. The temperature should be 60-70 ° C (do not overheat!).
2. Insert a plastic blade into the gap between the case and the screen at the USB-C connector and gently tuck the cover.
3. Swipe around the perimeter, snap the clamps. Don't force it, if the lid doesn't lend itself, heat the problem area again.

Step 2: Disconnect the battery plume

When you take the lid off, you'll see the battery covered by a metal plate.

1. Unscrew 10 screws with a cross screwdriver (they are of different lengths - remember where they were!).
2. Carefully slap the metal plate and remove it.
3. Unplug the battery plume with a plastic spatula.

Step 3: Remove the old battery

The battery is glued to the body to remove it.

1. Put a plastic blade around the battery from any angle and pull it up, and if it doesn't lend itself, put the isopropyl alcohol under the battery, and it dissolves the glue.
2. If you pull too hard, you can tear the plume or damage the board.
3. After extraction, clean the place under the battery from the glue residues with alcohol.

Step 4: Installation of a new battery

Before installing, check that the new battery has an insulating film (if not, stick it yourself).

1. Stick bilateral tape or apply a thin layer of B-7000 glue to the body.
2. Carefully install the battery, combining contacts with the plume.
3. Press it for 1-2 minutes to get the glue.

Step 5: Assembly of the phone

Collect the phone in reverse order:

1. Connect the battery plume.
2. Set a metal plate and twist the screws (observe order!).
3. Press the back cover until the clamps click. If necessary, warm the edges with a hairdryer for better fixation.

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After replacing the battery, be sure to calibrate it: completely discharge the phone, then charge to 100% without interruptions. Repeat the procedure 2-3 times for the charge indicator to work accurately.

Common Mistakes When Replacing a Battery and How to Avoid Them

Even experienced users sometimes make mistakes that cause their phones to break down.

• 🔧 Tangled screws: Rotors of different lengths — if you screw a long one into an unintended place, you can damage the board. Solution: Stack them in groups or photograph the location.
• ⚡ Battery plume damage: If you pull the wires instead of the connector, the plume can come off. Solution: Only use a plastic blade to pull the wires.
• 🔥 Overheating during heating of the body: Temperature above 80°C warps plastic Solution: Keep the hair dryer 10cm away and don't heat one dot longer than 30 seconds.
• 📉 Poor-quality glue: Cheap Scotch will fall off in a week and the battery will "wander." Solution: Use B-7000 or the original Xiaomi glue.
• 🔋 Incompatible battery: A battery with a different label may not hold a charge or charge.Solution: Check the marking BM4H.

If the phone is not switched on after replacement:

1. Check if the battery plume is connected.
2. Make sure your contacts are not contaminated (wipe with alcohol).
3. Connect the charge for 10-15 minutes – sometimes a new battery requires a “wake-up”.

How much does it cost to replace the battery in the service?

If you're not sure about your ability, you can contact a service center, and the cost of replacing it depends on the region and the status of the workshop:

In the official service, you will be given a guarantee for work (usually 3-6 months), but the price will be higher. informal workshops often use non-original batteries, so specify in advance what battery will be put.

Self-replacement will cost 800-1500 rubles (battery cost + tools), but the risk of damaging the phone lies with you. If the Mi Max 3 is your main smartphone, it is better to be safe and give it to the service.

What to do after replacing the battery?

The new battery requires the right run-in to last as long as possible.

• 🔄 Sizing: In the first 3 Allow the phone to be fully charged and charged (0% → 100%) 2-3 successively.
• 🔌 Charging: Use the original Xiaomi power supply (5V/2A or 9V/2A). Avoid “fast” charging from other brands.
• 🌡️ Temperature: Do not leave your phone in the sun or near heat sources (e.g., on a torpedo in a car).
• 📵 Storage: If you don’t use your phone for long, keep it charged. 40-60% cool-place.
• 🔋 Apps: Remove programs to “battery optimization” – they only accelerate wear and tear.

The average life of a new battery is 2-3 years (500-800 charge cycles) to extend it:

• Do not allow full discharge (charge at 10-20%).
• Avoid charging "to the point" (turn off at 80-90%).
• Regularly update the firmware – new versions of MIUI optimized power consumption.

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Turn on Battery Savings mode (Settings → Battery → Saving Mode) in the settings, which limits the background activity of applications and reduces the brightness of the screen, which increases the running time by 15-20%.

FAQ: Frequent questions about replacing the battery with Xiaomi Mi Max 3