Xiaomi’s robot vacuum cleaners have proven to be reliable cleaners, but over time, their battery capacity inevitably declines. If your gadget starts to run out faster or stops turning on without a base, it’s probably time to replace the power source. Many owners immediately turn to service centers, although the replacement process can often be done on their own at home with basic skills and tools.
In this article, we will discuss how to safely remove the battery from the Xiaomi robot vacuum cleaner without damaging delicate electronics. We will look at the design features of the popular models of the Vacuum, Mijia and Roborock series, and highlight the key points that should be paid attention to before starting the disassembly.
Diagnosis and preparation for replacement
Before you start physically disassembling the device, you need to make sure that the problem lies in the battery. Sometimes the failures are caused by contamination of contacts or software errors, check whether the charging indicator is on when the device is on base, and whether the battery indicator flashes red during operation.
If the diagnostics confirm the need for replacement, prepare the workplace. You will need a clean, flat surface with good lighting. Gather the necessary tools in advance to avoid distractions during the work.
- 🔧 Cross screwdriver (usually size required) PH2 or PH1).
- 🔧 Plastic blade or mediator for opening the body.
- 🔧 Tweezers for careful extraction of plumes and screws.
- 🔧 Folding capacity for fastening elements.
Before starting work, make sure the robot vacuum cleaner is off. For models with an on button on the body, move the switch to the OFF position or hold the off button until the indicators are completely damped.
⚠️ Warning: Never attempt to remove the battery while the device is connected to the charging station or under voltage.This can lead to a short circuit on the controller board.
☑️ Preparation for battery replacement
Features of the design of different Xiaomi series
Xiaomi’s robot vacuum cleaner design can vary significantly depending on the series and year of release. Understanding your device’s architecture will help you avoid unnecessary disassembly errors. All models can be divided into several groups according to the type of battery access.
The first group is classic models such as the Xiaomi Vacuum 1S, Mijia 1C and early versions of the Roborock S5. In these, the battery is often accessed through a removable bottom cover or requires partial disassembly of the main body; the second group is more modern models with integrated batteries, where the upper cover with the lidar module is removed to replace.
The third group includes models with an external removable battery, although they are becoming less and less. In such devices, for example, some versions of the Mijia Robot Vacuum-Mop P, the battery is removed by simply turning the locks without using a screwdriver.
How to determine the type of battery in your model?
Special attention should be paid to the location of the screws, which are hidden under rubber legs or decorative stickers in some models, and a close inspection of the bottom of the device will help you find all the attachment points.
Step-by-step: how to remove the battery
The process of removing the battery requires consistency and accuracy. Below is a general-purpose instruction that is suitable for most models with a hidden battery. First, turn the robot vacuum cleaner upside down and remove the side brush if it interferes with access to the screws.
Unscrew all the visible screws on the bottom panel. If the bottom cover is removable, gently tuck it with a plastic blade around the perimeter. In fixed-bottomed models, you may need to remove the top of the body. This usually requires you to twist the screws from the bottom and then carefully remove the top cover, moving it or pulling it up, taking care with the plumes.
- 🔋 Disconnect the battery connector from the motherboard.
- 🔋 Unscrew the screws that lock the battery compartment (if any).
- 🔋 Remove the old battery by pulling a special tongue or gently smacking the body.
When you disconnect the connector, don't pull the wires. Take the plastic connector itself and sway it out of the socket with swaying motions. Often the connectors sit very tightly, and tweezers or a thin plastic blade will help.
When you remove the old one, compare it to the new one. They have the same dimensions, voltage and type of connector, and you put the new battery in the reverse order, you plug it in, then you lock it in and you assemble it.
Table of compatibility and characteristics of batteries
When choosing a new battery, it is critical to consider specifications. Using an incompatible cell can lead to unstable operation or damage to the robot's electronics. Below is a table with common models and types of batteries used in them.
| Model robot. | Type of battery | Capacity (mAh) | Voltage (B) |
|---|---|---|---|
| Xiaomi Vacuum 1 / 1S | Li-ion | 2900-3200 | 14.4 |
| Roborock S5 / S5 Max | Li-ion | 5200 | 14.4 |
| Mijia 1C | Li-ion | 2400-2500 | 14.4 |
| Xiaomi Vacuum-Mop 2 | Li-ion | 3200 | 14.4 |
Pay attention to the BMS (Battery Management System) labeling. Xiaomi’s original batteries have a quality protection board that prevents overheating and overcharging. Cheap counterparts may not have full protection, which is dangerous for the device.
If you're not sure about your device's model, you'd better take off your old battery and look for a replacement by the label number, which guarantees 100% compatibility.
Common Replacement Mistakes and How to Avoid Them
Replacing the battery on its own is a process that requires care. Beginners often make mistakes that can cause the robot to break. One of the most common mistakes is to damage the plumes when the lid is removed. Don't pull the lid sharply if it's not removed.
Another common mistake is that you don't connect the connector correctly, so if you put a force on the connector and plug it in the wrong way, you can burn the power controller. Always check the contacts before you connect.
⚠️ Warning: Do not leave the new battery discharged for long-term storage. Lithium-ion cells are prone to self-discharge and can fail if voltage falls below a critical threshold.
Also, don't ignore calibration after replacement, because once you have a new battery, the robot may not display the charge level correctly, and to fix this, you need to do a full charge and discharge cycle.
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After the battery is replaced, put the robot on base and let it charge to 100% without interruption, then start cleaning at maximum power until full discharge, which will help the controller accurately determine the new capacity.
Calibration and inspection of work after replacement
After you have successfully assembled the device, take your time to start it up and make sure that the charging indicator is on when you install it on the base. If the robot emits an audible signal or flashes an error indicator, turn it off immediately and check the connection.
If the device is switched on normally, run the Mi Home app and check battery status. Ideally, the charge level should quickly rise to 100% (if the battery was partially discharged) or show the correct value. The app can also see the number of recharge cycles - after replacement, it can be reset or displayed again.
Do a test cleaning in Quiet or Standard mode. Pay attention to the robot's behavior: there should be no jerks, no stops, no low charge reports at the beginning of the cycle. If it's successful, you can move to normal operation.
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Proper calibration of the battery after replacement prolongs its life and ensures the residual charge is accurately displayed in the application.
Where to buy the original battery and analogues
The issue of sourcing quality components is acute. Xiaomi’s original batteries often have a brand logo and protective holograms on the packaging, and can be purchased from authorized service centers or large online electronics stores.
Analogues from third-party manufacturers (e.g. GreenCell, Patona) can cost less, but their quality varies. When buying, pay attention to reviews and availability of warranty. Cheap "no-name" batteries from marketplaces often have real capacity 2-3 times lower than claimed.
When choosing between the original and the quality counterpart, the original often wins because of its perfect size compatibility. In some models, such as the Roborock S5, even a small extra millimeter in the thickness of the battery can prevent you from closing the lid.