How to Open Xiaomi Mouse: Instructions for All Models (2018–2026)

Xiaomi’s wireless mouse can be decomposed for many reasons, from simple contact cleaning to battery replacement or button repair. However, the design of the brand’s devices often raises questions – the body is fastened without visible screws, and plastic latches are easy to break when sloppy opening. In this article, we will examine all the current Xiaomi mouse models (from the budget Mi Mouse Lite to the premium Mi Wireless Mouse Pro), show hidden mounts and advise you how to avoid typical errors.

It's important to understand that the disassembly process varies depending on the year of release and the series of the device. For example, mice from 2018 to 2020 (like the Mi Bluetooth Mouse) often have screws under their legs, while new models (Mi Mouse 3 or Mi Portable Mouse) are assembled on the latches, we have collected unique circuits for each popular version, including rare modifications for the Chinese market.

If you've never disassembled a gadget yourself, don't worry, with our instructions and a minimum set of tools (plastic blade, tweezers, screwdriver). T5/T6) You'll be fine. 10–15 The key is to follow a step-by-step algorithm and not put too much effort where it is not necessary.

What tools will be needed to disassemble

Before you start opening the case, prepare everything you need, and the lack of the right tools is the main cause of damage to plastic or PCBs.

• 🔧 Screwdriver cross (T5 or T6) — It's a fit for propellers under the legs. T5H (centre-hole).
• 📱 Plastic blade (or mediator) to separate the latches. Metal objects will leave scratches!
• 🧲 Tweezers - useful for extracting small parts (springs, plumes).
• 🔋 Hair dryer or thermal air station – only for models with adhesive attachment (for example, Mi Mouse) 2S).
• 📸 Smartphone – to photograph the location of parts before disassembly.

In addition, it may be necessary to:

• 🧴 Isopropyl alcohol (90%+) - for cleaning contacts or removing glue residues.
• 🔗 Suction - helps to suction the top cover of models with a smooth surface (for example, Mi Wireless Mouse Youth Edition).
• 🔍 Loop - to inspect soldered contacts or chips.

If you're planning to replace your battery, buy it in advance, considering the capacity and size. For example, a Mi Mouse Lite battery is suitable. 3.7V 300mAh plug-in JST 1.25 for the Mi Wireless Mouse Pro — 3.7V 500mAh.

⚠️ Warning: Do not use knives or screwdrivers with a wide sting to open the latches! This leads to chipping of the plastic and violation of the tightness of the case.

Xiaomi’s step-by-step disassembly of the mouse (universal method)

This instruction is suitable for most Xiaomi models, including Mi Mouse Lite, Mi Bluetooth Mouse, Mi Wireless Mouse Youth Edition and Mi Mouse. 2S. Exceptions - mice with glue fastening (we will tell about them separately).

Follow the algorithm:

1. Disconnect the mouse from the device and remove the battery (if it is removable).
2. Turn the mouse over and remove all the stickers - screws may be hidden underneath.
3. Unscrew the screws under the legs (usually 3-4 pieces). In some models, the screws are hidden under rubber inserts - they must be carefully tucked with a spatula.
4. Insert the blade into the gap between the top and bottom of the body (start from the wheel side). Smoothly guide the tool around the perimeter, disconnecting the latches.
5. Remove the top cover. If it doesn't respond, check if all screws are twisted.
6. Disconnect the plume (if any) between the board and the scroll wheel. Do this carefully by pulling the plastic connector, not the wires!

Now you have two parts of the case and an internal board, and you'll need to get to the buttons or the battery to:

• Seal off the wires from the buttons (if you need to replace the micro-switches).
• Unstick the battery (in models with a non-removable battery). To do this, warm up the body with a hairdryer (60-80).°C) and slid the battery with a spatula.

Check the integrity of all latches.|Make sure the wheel is connected correctly.|Clean the battery contacts with alcohol|Twisting all screws with a force of 0.3-0.5 N·m (do not tug over!)-->

If the wheel is hard to scroll or the buttons don't work after assembly, take the device apart again and check:

• Won't the wheel be pinched?
• Are the springs under the buttons properly installed?
• Are there any foreign objects inside the case (for example, plastic debris).

Features of disassembling popular Xiaomi models

Despite the general principles, each Xiaomi mouse has unique nuances, and we have collected them in a table:

For models with adhesive attachment (for example, Mi Bluetooth Mouse or Mi Mouse) 2S) Do this:

1. Warm up the body with a hair dryer (temperature 60-80)°C) for 2-3 minutes.
2. Carefully tuck the lid with a plastic spatula, starting from the junction near the wheel.
3. If the glue does not respond, repeat heating for another 1 minute.
4. After disassembly, remove the glue residues with alcohol and use a new two-sided tape when assembled.

How to replace the battery in the mouse Xiaomi

Non-removable batteries are one of the most common reasons Xiaomi mice are disassembled, and over time they lose capacity and the device has to be recharged daily, and the replacement process involves several steps:

1. Removal of the old battery

• If the battery is glue-based, warm it up with a hair dryer (maximum 80).°C) and scapula.
• If soldered - carefully solder off contacts soldering iron (power 30-40 W).
• Don’t pull the wires – they are often soldered to the board!

Selection of a new battery

The main parameters for the selection:

• 🔋 Capacity: should match or be slightly larger (for example, instead of 300mAh can be placed 350mAh).
• 📏 Dimensions: Measure the old battery with a rod — ±1 mm.
• 🔌 Connector: Most commonly used JST 1.25 or PH 2.0. Check the markings on the board.

Installation and inspection

After replacement:

• Connect the mouse to charging for 1-2 hours.
• Check the operation of all buttons and wheels.
• If the mouse does not turn on, check the polarity of the battery connection!

⚠️ Note: In the Mi Mouse models 2S And the Mi Wireless Mouse Pro battery can be soldered directly to the board without a connector, and you'll need a soldering iron with a thin sting and solder.

Mi Mouse Lite|Mi Bluetooth Mouse|Mi Wireless Mouse Youth Edition|Mi Mouse 2S|Mi Wireless Mouse Pro|Another model-->

Common Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when disassembling Xiaomi mice, and here are the most common ones and ways to prevent them:

• 🔧 The screws break down when you use the wrong screwdriver. Always check the markings (T5 or T6) And don't put too much effort into it.
• 💥 The break of the wheel's plume is fragile and easily torn. Unplug it by holding on to the plastic connector, not the wires.
• 🔥 Overheating of the battery - when soldering or heating with a hair dryer, the temperature should not exceed 80°C. Otherwise, the battery may swell.
• 🧲 Loss of springs — some models have springs under the buttons. Work on a table with a white tablecloth so you don't lose them.
• 🔌 Short circuit – when replacing the battery do not touch the metal tools contacts on the board.

If you've made a mistake, don't panic. Most of the problems are solvable.

• The screw can be drilled and replaced with a new (diameter) M1.4 or M1.6).
• The broken plume of the wheel is sometimes possible to temporarily restore, cleaning the contacts and soldering thin wires.
• If the mouse does not work after assembly, check the battery voltage with a multimeter (should be 3.7–4.2V).

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Before the first disassembly, practice on an old or broken mouse, which will help you feel the force required to disconnect the latches, and avoid errors on the working device.

Cleaning and maintenance after disassembly

Since you've disassembled the mouse, you should also maintain it fully, which will extend the life of the device and improve its performance.

1. Contact and fee cleaning

• 🧹 Use isopropyl alcohol (90%+) and cotton swabs to clean the contacts of the buttons, wheel and battery.
• 🔍 For hard-to-reach places (for example, under micro-switches), a toothpick wrapped in cotton will suit.
• 🚫 Don’t use acetone or solvents – they will damage plastic!

Lubrication of machinery

If the wheel is curling or creaking:

• Apply 1 drop of silicone lubricant (for example, WD-40 Specialist) on the wheel axle.
• For buttons, use contact lubrication (for example, CRC 2-26).
• Avoid excess lubrication - it can leak onto the board and cause contacts to stick.

3. Replacement of worn parts

Signs that the part needs to be replaced:

• 🖱️ Buttons fail or go off again. → New micro-switches (Omron) are needed. D2FC-F-7N analogue).
• 🌀 The wheels scroll through with jerks → Engaged encoder (replace the entire mechanism).
• 🔋 The battery is swollen or does not hold the charge → new battery required.

After maintenance, allow the parts to dry for 10-15 minutes before assembly, which is especially important if you have used alcohol or lubricant.

Where to buy spare parts for Xiaomi mice

If you need original or compatible parts, look out for these sites:

When buying spare parts on AliExpress, pay attention to:

• 📸 Photo of the real product (not stock pictures).
• ⭐ Seller rating (98% and above).
• 💬 Photo reviews – there are often indicated compatibility with specific models.

For rare parts (such as control boards), try Xiaomi service centers or electronics repair shops, and they sometimes sell used parts from broken devices.

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Before buying parts, always check their items or sizes with the original parts. For example, the batteries for the Mi Mouse Lite and Mi Wireless Mouse Pro look similar, but have different connectors!

Frequently asked questions