How to get the battery from the robot vacuum cleaner Xiaomi: disassembly without damage

Xiaomi vacuum cleaners are reliable cleaning assistants, but over time even their lithium-ion batteries lose capacity. If your Mi Robot Vacuum, Viomi or Dreame is running on the battery for less than 20 minutes and discharges quickly after charging, it's time to replace the power source. However, disassembling the case and removing the battery requires caution: improper actions can lead to damage to the control board, short circuit or even fire.

In this article, you will find step-by-step instructions for popular models (including Mi Robot Vacuum-Mop 2 Pro, Viomi). V3 dreame D9), A list of tools you need, as well as unique battery mounting schemes in devices from 2022 to 2026, we will also tell you how to avoid typical errors, such as a break in the collision sensor plume or damage to charging contacts.

Preparation for disassembly: tools and security measures

Before you start removing the battery, make sure you have everything you need, and the lack of the right tools is the main reason for broken latches and scratches on the body.

• 🔧 Plastic mediators (or guitar mediators) - to disconnect the latches of the body without scratches.
• ⚒️ Cross screwdriver (usually) PH0 or PH1) — lid-pin.
• 🔋 Multimeter – to check the battery voltage before extraction (normal: 14.4–16.8 V for most models).
• 🧤 Rubber gloves – Lithium-ion batteries are sensitive to static electricity.
• 📸 Smartphone – to photograph the location of plumes and screws (this will save you when you build back).

Pay special attention to security measures:

• 🔌 Disconnect the vacuum cleaner from the network 2-3 hours before disassembly - this will discharge the capacitors on the board.
• 🚫 Do not use metal tools to slap the lid – they can close the contacts of the battery.
• 🌡️ Work at room temperature (18–25)°C) A cold battery may be fragile.

⚠️ Attention: If the vacuum cleaner case is deformed after a fall or the battery is swelled (see the bulge on the bottom cover), do not try to disassemble the device yourself. Bloated lithium-ion batteries are prone to spontaneous combustion - contact the service center.

Step 1: Removing the top cover – hidden latches and screws

The body of the Xiaomi robot vacuum cleaner is mounted with a combination of screws and plastic latches, which vary depending on the model, but the general principle is the same.

1. Turn the vacuum cleaner upside down and remove the dust collector (a garbage container). Under it is often hidden 1 screw (for example, in Mi Robot Vacuum). 1S).
2. Carefully apply the lid to the plastic mediator, starting at the back (on the charging connector side). The latches are usually located around the perimeter in increments of 3-5 cm.
3. If the cover doesn’t lend itself, check the front part – there may be additional screws under the stickers (for example, in Viomi). V3).

In the Dreame models (for example, Dreame) D9) The top cover is mounted with 4 screws under rubber legs, which you need to carefully tweezer or screwdriver.

⚠️ Note: In models with a laser rangefinder (for example, Mi Robot Vacuum-Mop P), the top cover is connected to the sensor plume. Don't pull it sharply - first disconnect the connector (it is usually white and fastened with a latch).

I took a picture of the screws.|Checked for hidden attachments under the stickers|Prepared plastic mediators|Disconnected the dust collector and side brushes (if any)|Checking the battery power (not higher than 30% for safety)-->

Step 2: Battery disconnection – contacts and plumes

After removing the top cover, you will see a battery – usually a rectangular unit labeled Li-ion. 14.4V or 16.8V. It is attached to the body in two ways:

• 🔩 Screws (in older models, for example, Mi Robot 1st generation).
• 🧲 Bilateral Scotch (in newer ones, for example, Viomi) V3 or dreame D10).

Before you remove the battery, be sure to disconnect it from the charge:

1. Find a power connector – usually a black or white connector with 2-4 wires (red). +, Black – sometimes yellow/blue for thermistor).
2. Carefully pull the plastic latch of the connector up or sideways (not by the wires!) in some models (e.g. Dreame). D9) The connector is fixed with a small screw - it must be twisted out.
3. If the battery is taped, put it on a plastic card starting at the corner. Don't use metal tools!

In models with battery management system (BMS) (For example, Mi Robot Vacuum-Mop 2 Pro can be an extra plume to control the temperature.

Step 3: Extraction Features for Popular Models

The design of the battery compartment differs depending on the series of robot vacuum cleaners, and let's look at the key differences for the most common devices.

Mi Robot Vacuum 1/1S/2 (2016–2020 years)

In these models, the battery is mounted with two screws and double-sided tape, and the main difficulty is the fragile plume of the collision sensor that runs over the battery.

• First, disconnect the battery connector (the white connector next to the board).
• Unscrew the screws of the mounting (usually) PH1).
• Carefully lift the battery, do not pull it on yourself - the plume may come off!

Viomi V2/V3 (2020–2022 years)

Here, the battery is glued to the body, and the power connector is hidden under a plastic cover.

• The cover is attached to 4 latches - put it on the side.
• The battery connector is fixed by the screw - do not forget to unscrew it.
• In Viomi. V3 have an extra thermosensor (thin white wire) - don't damage it.

Dreame D9/D10 (2021–2026 years)

The hardest part to disassemble is the compact layout, the battery here is integrated with the control board and mounted on 5 screws.

• First, remove the side brushes and bumper (they interfere with access).
• Disconnect two connectors: the main (black) and auxiliary (blue for) BMS).
• Battery mounting screws can be of different lengths - remember what you were standing there!

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If the screws are boiling (especially in older models), moisten them with alcohol or WD-40 And wait 5-10 minutes. Don't force it, because the threads in the plastic case are almost never recovered.

Step 4: Check the battery before replacing

Before you install a new battery, diagnose the old one, which will help you know if it has actually failed.

1. Transfer the multimeter to DC mode with a limit of 20 V.
2. Connect the probes to the battery contacts: red to +, black to -.
3. Compare the readings to the norm: 🔋 16.8 V - full charge (100%). 🔋 14.4–15.5 B – normal level (30–80%). 🔋 Below 12V - deep discharge, battery to be replaced.

If the voltage is 0 V, check the fuse on the board (may be burned).

Also, check the battery visually:

• 🔍 Bloating is a sign of malfunction (urgent replacement is required).
• 🔍 Oxidating contacts - clean them with alcohol.
• 🔍 Damaged insulation – can cause short circuit.

⚠️ Warning: If the battery is swollen, don't try charging it - it's dangerous! Lithium-ion batteries in this state are prone to heat acceleration (uncontrolled heating to 300).°C and above. Dispose of it at special reception points.

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The new battery should have the same parameters as the old one: voltage (14.4 B 16.8 B), capacity (±10% The original size, for example, for the Mi Robot Vacuum. 1S battery 14.4V 5200mAh sized 135×60×20 mm.

Step 5: Installation of a new battery and assembly

When installing a new battery, follow the reverse disassembly order, but consider a few nuances:

1. If the new battery comes without a connector, gently solder the connector with the old one (use a soldering iron with a power of no more than 30 watts).
2. Secure the battery with screws or double-sided tape (depending on the model). D9 Use heat glue for reliable fixation.
3. Connect the power connector last when all screws and plumes are in place.
4. Before closing the cover, check the vacuum cleaner: turn it on and make sure it is properly charged (the indicator should burn green).

In models with laser rangefinder (Mi Robot Vacuum-Mop P, Dreame) D10) After the battery replacement, calibration may be required LDS. For that:

1. Press the Home button for 5 seconds.
2. Wait for the sound signal and the indicator flash.
3. Place the vacuum cleaner on a flat surface and wait until the process is over (about 1 minute).

If the vacuum cleaner does not turn on after assembly, check:

• 🔌 Correct connection of connectors (especially the plume of the collision sensor).
• 🔧 Tightening of screws – untwisted mounts can cause short circuit.
• 📱 Settings in the Mi Home app – sometimes you need to reset to factory settings.

Common Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when replacing a battery, and here are the most common problems and ways to prevent them:

Another common problem is that the vacuum cleaner doesn't hold its charge after the battery is replaced, and the reasons may be as follows:

• 🔋 Low-quality battery – buy only from trusted sellers (for example, original Xiaomi batteries or certified counterparts from Baseus, Remax).

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If the vacuum cleaner works less than the stated time after replacing the battery, perform a calibration cycle: completely discharge it (before turning it off), then charge it to 100% without interruptions. Repeat the procedure 2-3 times.

Where to buy a battery and how much it costs

The cost and availability of Xiaomi robot vacuum cleaner batteries varies by model and region, and here are the current prices for 2026:

When buying, pay attention to:

• 📄 Quality Certificate – Original Batteries Have Xiaomi Hologram.
• 📦 Set – the set should be fasteners and thermal paste (for models with active cooling).
• ⭐ Reviews - in analogues, batteries with low capacity are often found (for example, instead of 5200mAh sell-out 4000mAh).

If you're not sure about your choice, go to certified service centers, and it costs 1,500 to 3,000 to replace your battery. ₽ (plus the cost of the battery, but you will get a job guarantee.

FAQ: Frequent questions about battery replacement