Replacement of batteries in the mouse Xiaomi: instructions for all models

Xiaomi's wireless mouse has long been the standard for many users, thanks to a combination of price, quality and design. But even the most reliable technology requires maintenance — and sooner or later you will be faced with the question of how to change the batteries in the Xiaomi mouse so as not to break it and not lose contact with the computer. This procedure seems simple, but every model has nuances from the type of batteries to the location of the compartment.

In this article, we will discuss the process of replacing batteries for all popular models - from Mi Wireless Mouse to Mi Bluetooth Mouse 2, pay attention to choosing the right batteries (AAA, AA, We'll talk about lithium pills, and why the mouse might not work after it's been replaced, and how to fix it, and we'll tell you what mistakes users make most often, and how to avoid breakdowns.

If your Xiaomi mouse suddenly stops responding to movements or your cursor twitches, don't rush to buy a new one. 80 percent of the time, the problem is solved by a simple battery change, but it's important to do it right so you don't damage your contacts or disrupt your connection settings.

What batteries are suitable for Xiaomi mice

The first thing to start with is to determine what type of battery is used in your model. Xiaomi produces mice with three types of batteries:

✅ AAA (Little fingers are the most common variant, used in most models, including the Mi Wireless Mouse, Mi Portable Mouse and Mi Mouse Lite, easy to find in any store, but quickly discharged when used actively.

✅ AA (Finger) – less common, but can be found in some versions of the Mi Bluetooth Mouse. hold the charge longer, but take up more space in the body.

✅ CR2032 (Lithium tablets, which are used in compact models like the Mi Pocket Mouse, are miniature but require careful installation, and it's easier to confuse polarity than in cylindrical batteries.

🔋 Some Xiaomi mice support rechargeable batteries, but not all. Mi Wireless Mouse 2 is officially compatible with Ni-MH batteries. AAA, Mi Bluetooth Mouse can work unstable with rechargeable elements due to lower voltage (1.2V instead 1.5V).

To make no mistake, check the markings on old batteries or check the specifications of your model on the official website. If the batteries are already completely discharged, focus on the size of the compartment:

• 📏 Long narrow compartment (about 4.5 cm) - most likely, AAA.
• 📏 Short wide compartment (about 5 cm) - probably, AA.
• 📏 Round flat compartment (diameter) ~2cm) — CR2032.

Step-by-step: how to open the battery compartment

The most important thing is how to open the lid of the compartment properly so as not to break the latches. Xiaomi mice have two types of mounts:

1️⃣ Sliding cover (the most common version).

2️⃣ The lid on the latches (found in old models).

🔧 For the sliding cover:

1. Turn the mouse down with the buttons.
2. Find an arrow or an inscription on the bottom panel PUSH.
3. Press in the direction of the arrow and move the lid to the side.

🔧 For the latch lid:

1. Take a thin object (such as a plastic card or a mediator).
2. Carefully slap the lid on the side where the gap is visible.
3. Apply the force evenly throughout the perimeter so as not to break the plastic.

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🚨 Warning: Do not use metal objects (knives, screwdrivers) - they can scratch the body or close contacts. If the lid does not respond, check if there is any old battery inside that blocks the mechanism.

Installation of new batteries: polarity and nuances

Once you've opened the compartment, look closely at the polarity markings inside. + and −, But sometimes they can be barely noticeable.

🔋 General rules:

• 🔄 Plus (+) Always look towards the spring contact (usually it is higher).
• ⚫ Minus (−) flat-contact.
• 🔄 If the batteries are two, they are installed on the opposite side (plus one to minus the other).

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🚨 Note: In the mouse Xiaomi with a battery CR2032 Polarity is often confused compared to standard devices! in the Mi Pocket Mouse plus model (+) It's on top (on the side of the lid) and not on the bottom, like most gadgets. Make sure you've positioned the item correctly, or the mouse won't turn on.

🛠 If batteries don't come in easily:

• 🔍 Check if there are any debris or burrs inside the compartment.
• 🔄 Try flipping the battery over - you may have got the polarity wrong.
• 📏 Make sure you use the correct size (for example, AAA instead AA won't fit).

Once installed, close the lid carefully. Sliding models should snap it with a slight click. If the lid is not fixed, check if the battery is disturbing it (sometimes they are slightly longer than standard ones).

What to do if your mouse doesn’t work after replacing batteries

You changed your batteries, but the Xiaomi mouse doesn't show any signs of life? Don't panic -- 90 percent of the time, it's solved in minutes. Here's a step-by-step diagnostic algorithm.

🔍 1. Check the polarity of the batteries (even if you think you did everything right).

🔌 2.Make sure the mouse is on - some models have a physical power button (usually located under the thumb or on the bottom panel).

📡 3. Reconnect the mouse to the computer:

• For USB-Receiver: Remove and re-insert the adapter in the port.
• For Bluetooth: Remove the device in the settings and re-pair.

🔋 4. Check the battery charge - even new batteries can be discharged (especially if they have been in storage for more than a year.

🖱 5. Clean the contacts - sometimes oxidation or dust interferes with normal contact.Wash the metal parts inside the compartment with a cotton swab soaked in alcohol.

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🚨 Note: If after replacing the batteries, the Xiaomi mouse flashes a red LED and does not connect, this may mean resetting the communication settings, in which case you will have to re-pair with the computer (for Bluetooth models) or reboot. USB-receiver.

If neither of these methods worked, the problem could be the malfunction of the mouse itself (for example, the contact inside the case has gone) or the drivers on the computer, in which case, try connecting the mouse to another device to localize the problem.

Batteries comparison: which is better to choose for Xiaomi

Not all batteries are equally useful, and the type of battery will determine how long the mouse will last without replacing it, and the table below shows a comparison of the popular Xiaomi mouse options:

💡 Tip: If you use a mouse a lot, you'd better choose alkaline or lithium batteries. They're more expensive, but they're more profitable in the end, you don't have to change them every couple of months. For rare uses, like a mouse in a backpack, salt batteries are also good, but watch the shelf life.

⚠️ Careful with rechargeable batteries: Some Xiaomi models (such as the Mi Portable Mouse) may not work smoothly with Ni-MH batteries due to lower voltage. If the cursor twitches or the mouse periodically shuts down after installation, try conventional alkaline batteries.

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If you are using a Xiaomi mouse with CR2032, buy a lithium battery with a foam pad - it will prevent the closure of contacts when shaking.

Frequent Battery Replacement Mistakes and How to Avoid Them

Even with this simple procedure, users manage to make mistakes that lead to breakdowns. TOP-5 Failures and how not to repeat them:

🔴 1.Use old and new batteries together

🔹 Consequences: Fast discharge, leakage of electrolyte.

🔹 Solution: Always change the battery kit, even if one is still alive".

🔴 2. Use of force when opening the lid

🔹 Consequences: Broken latches, cracks on the body.

🔹 Solution: Use a plastic card and heat the case with a hairdryer (if the lid is boiling).

🔴 3. Wrong polarity in the battery CR2032

🔹 Consequences: The mouse does not turn on, the power controller may fail.

🔹 Solution: In Mi Pocket Mouse Plus (+) It should be on top, check the markings three times.

🔴 4. Ingestion of dirt or moisture in the compartment

🔹 Consequences: Corrosion of contacts, unstable work.

🔹 Solution: Before replacing, wipe the compartment with a dry napkin, and use alcohol when cleaning the contacts.

🔴 5. Use of batteries with expired expiration date

🔹 Consequences: Fast discharge, leakage.

🔹 Solution: Check the date on the package - the optimal shelf life of alkaline batteries is not more than 3 years.

🛠 If the mouse after replacing the batteries is unstable (for example, the cursor jumps or the connection disappears), try resetting the settings:

1. Turn off the mouse (if there is a power button).
2. Remove the batteries for 30 seconds.
3. Hold the left and right mouse buttons at the same time.
4. Put the batteries back in without releasing the buttons.
5. Wait 10 seconds and release the buttons.

This method helps to reset temporary communication errors and return the mouse to factory settings.

How to extend the life of batteries in the mouse Xiaomi

To ask less about “how to change the batteries in the Xiaomi mouse”, follow these tips:

🔋 1. Turn off the mouse when not in use

Many Xiaomi models have a power button or go to sleep automatically, but if you leave your mouse idle for a long time (for example, on weekends), it is better to turn it off completely.

🔌 2.Use. USB-switch-on

If your mouse is working through USB-Receiver, connect it to the hub with the on/off button, which will prevent parasitic battery discharge in standby mode.

📡 3. Update your mouse firmware (if supported)

Some models (such as the Mi Bluetooth Mouse 2) receive power optimisation updates. Check the firmware relevance in the Mi Bluetooth app.

🌡 4. Store spare batteries correctly

Don’t keep them in the fridge (it’s a myth!) – optimal storage temperature is 15–25°C. Avoid direct sunlight and humidity.

🔄 5. Alternate the load

If you have a spare mouse, change them periodically, allowing the batteries in each to rest, extending the overall lifespan.

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🚨 Note: Do not use batteries labeled “Heavy Duty” in Xiaomi mice – they are designed for low-power devices (for example, remote control panels) and will quickly discharge in a wireless mouse.

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The most effective way to save power is to turn off the mouse at night or when it is not in use for more than 2 hours, which prolongs the life of batteries by 1.5-2 times.

FAQ: Frequent questions about the batteries in the mouse Xiaomi