Xiaomi Mi Mouse 2 Disassembly Step-by-step guide with photo and repair tips

The Xiaomi Mi Mouse 2 wireless mouse has become a popular choice thanks to its ergonomic design, low price and stable operation. However, over time, even such reliable equipment requires maintenance: accumulated dirt under the buttons, battery wear or breakage of micro-switches can bring the device down. Disassembling the mouse yourself is a simple task, but requires accuracy and knowledge of the nuances of design.

In this article, you will find detailed instructions on how to disassemble photos of key stages, a list of necessary tools and tips on how to avoid typical errors. We will also tell you what parts most often fail, how to diagnose them and where to find a replacement. If you have never disassembled electronics, don’t worry: the Mi Mouse 2 design is designed so that even a beginner can cope with the task.

Before you start, please note that Xiaomi warranty does not apply to devices with autopsy marks. If the mouse warranties, you should contact the service center. For all other cases, our guide will save time and money.

Preparation for disassembly: tools and precautions

Before you take on the screwdriver, prepare the workplace and tools. Xiaomi Mi Mouse 2 understands without a soldering iron, but you will need:

• ✅ Plastic blade (or mediator) - to separate the body without scratches.
• ✅ Cross screwdriver (size) PH0 or PH00) — screw-hole.
• ✅ Tweezers - for extraction of small details (springs, plumes).
• ✅ Alcohol wipes - for cleaning boards and contacts.
• ✅ Hair dryer or compressor (optional) - for blowing dust from hard-to-reach places.

Important: Don't use metal tools to separate the case, they leave scratches and can damage the latches. If you don't have a plastic blade at hand, an old bank card will do.

⚠️ Warning: Do not disassemble the mouse with the Bluetooth connection on! disconnect it from the device through settings or remove the battery to avoid short circuits when manipulating the board.

Also, prepare a screw container -- they're small and easily lost -- you can use a magnetic mat or a regular plastic bottle lid with a piece of tape inside.

Disconnect the mouse from the device|Remove the battery (if any)|Prepare tools|Cleaning the workplace of foreign objects|Take a photo of the initial state of the mouse-->

Step 1: Removal of the upper body cover

The Xiaomi Mi Mouse 2 body consists of two parts held together by plastic latches and two screws under the legs. Start by flipping the mouse and removing the stickers from the legs - the screws are hidden underneath them.

Carefully put the legs with a plastic spatula (they are glued, but easily move away). Under them you will see screws - twist them out with a cross screwdriver. The screws in Mi Mouse 2 are of different lengths: remember which one from where, so as not to confuse them when you build.

Once the screws are removed, grab the top of the body (where the wheel is) and pull it upwards. The latches are fragile enough, so don't put too much effort. If the lid doesn't lend itself, shovel around the perimeter, gently pressing the latches.

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If the latches do not respond, slightly heat the body with a hairdryer (temperature not higher than 50).°C) The plastic will be softer and disassembly will be easier.

Step 2: Recovery of fees and fault diagnosis

Once you remove the top cover, you'll see the main board with micro-switches, a wheel and a Bluetooth module. The board is attached to the bottom of the case with another screw - unscrew it.

Before you extract the board, notice the wheel plume -- it's connected to the socket on the board. Gently flick the socket with tweezers, pulling the black lock. Don't pull the plume itself -- it can damage the contacts!

Now you can check the board for malfunctions, and most of the time, Mi Mouse 2 fails.

• 🔋 Micro-button switches (wear and tear of contacts after 1-2 years of use).
• 🖱️ Optical sensor (lens contamination or failure).
• 🔌 Battery contacts (oxidation or mechanical damage).
• 📡 Bluetooth module (less commonly due to falls).

⚠️ Warning: If the board shows traces of oxidation (greenish coating) or bloated capacitors, the mouse requires professional repair.

To diagnose the buttons, use the multimeter in vertebrae mode: when you press the micro-switch, an audible signal should be heard. If there is no signal, the part must be replaced.

Step 3: Cleaning and Replacing Components

If the purpose of the dismantling is cleaning, start by removing dust and dirt.

• 🧹 Soft brush - to remove dust from the board and body.
• 💧 Alcohol wipes – for cleaning contacts and buttons.
• 🌬️ Compressor or hair dryer - to blow dust out of the cracks.

To replace micro-switches (buttons), buy similar parts on AliExpress or at local radio stores. Popular models for Mi Mouse 2:

• Kailh GM 4.0 – tactile, resource 5 million presses.
• Omron D2FC-F-7N — Classical, resource 10 million clicks.

When you change the sensor, look at the model. Mi Mouse 2 uses PixArt. PAW3205 or PAW3327 (The new sensor must be identical to the original sensor, otherwise the mouse will not work properly.

If the battery contacts are the problem, clean them with alcohol or bend them gently for a better fit. In extreme cases, you can solder new contacts, but this requires soldering skills.

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Do not use acetone or solvents for cleaning - they will damage the plastic of the case and the marking on the board.

Step 4: Building the mouse after repair

The assembly is in reverse order, but there are several nuances:

1. Make sure that the wheel plume is correctly inserted into the connector and fixed.
2. Check that the spring of the wheel is in place (it often falls out during disassembly).
3. Twisting all screws, but don't pull over - plastic can crack.
4. When docking the body, start with the latches near the wheel, then snap the rest.

After assembly, turn on the mouse and check all the buttons, wheel and cursor movement. If something is not working correctly, take the mouse apart again and check:

• ❌ Are there wires or plumes clamped.
• ❌ Are the micro-switches installed correctly (they should sit tightly, without backlash).
• ❌ Are there any foreign objects inside the case (snippets of scotch, dust).

If the mouse does not turn on, check:

• 🔋 Battery polarity (Mi Mouse 2 uses one battery) AAA).
• 🔌 Battery compartment contacts (they should spring and fit tightly).
• 📡 Bluetooth Module Status (in case of damage, the mouse will not be determined by the devices).

Common Mistakes and How to Avoid Them

Even with careful disassembly, beginners often make mistakes that lead to new breakdowns.

Another common problem is the loss of sensor sensitivity after cleaning, which happens when you accidentally move the sensor lens or damage it, and to avoid this, don't press the lens and clean it with dry wipes -- just a soft brush or a cotton swab with alcohol.

If the mouse is not turned on after assembly, but the battery is charged, check:

1. Integrity of contacts on the board (possibly, the wire broke off with careless extraction).
2. Correct installation of the micro power switch (it should click when pressed).
3. The condition of the fuse (if it is on your fee review).

Where to buy spare parts for Xiaomi Mi Mouse 2

If the diagnosis showed that the mice needed replacement parts, here’s where they can be found:

• 🛒 AliExpress is the widest choice of micro-switches, sensors and enclosures, starting at 50 rubles per part, but delivery can take 2-4 weeks.
• 🏬 Local radio stores – suitable for buying standard components (for example, Omron or Kailh micro-switches).
• 🔧 Xiaomi Service Centers – Sometimes sell original parts, but at an inflated price.
• 📦 Donor mice – you can buy used Mi Mouse 2 with faulty Bluetooth, but with work buttons or a sensor.

When buying spare parts, pay attention to:

• Compatibility – For example, the sensor must be the same model as the original.
• Quality – Cheap Chinese micro-switches often fail after a few months.
• Set – Some vendors ship parts without fasteners.

Average Parts Prices (2026):

• Microswitch - 100-300 rubles.
• Optical sensor – 300-600 rubles.
• Management fee (b/u) - 500-1000 rubles.
• The housing (new) - 200-400 rubles.

If you’re not sure about the choice, look online for Mi Mouse 2 disassemblies on YouTube, which often show what details are used in a particular mouse revision.

FAQ: Frequent questions about the Xiaomi Mi Mouse 2