The Xiaomi Enchen series of electric shavers have gained popularity due to their affordable price and high shaving efficiency.However, like any technically sophisticated appliance, they require periodic maintenance, cleaning or repair. Owners often face the need to get to the insides of the device to replace the battery or remove stuck hair that blocks the rotation of the knives.
The process of disassembling these devices is not trivial, since the manufacturer uses hidden fasteners to ensure moisture protection and aesthetic appearance. The absence of visible screws on the case can be confusing to the inexperienced user. In this material, we will discuss in detail the design, necessary tools and sequence of actions for the safe opening of the case.
It is important to understand that self-interference with the device can lead to loss of warranty. If your razor is in warranty service, it is better to contact an authorized service center. However, if the warranty has expired or the case is not warranty, you can proceed independently, observing precautions.
Tools and workplace preparation required
Before any electronic manipulation begins, you need to organize a clean and well-lit space. You will need a set of tools that will allow you to work with small parts without damaging them. The main requirement is the presence of thin and durable tools, since the clips in the case of Xiaomi Enchen sit quite tightly.
To successfully disassemble, you will need a plastic spatula (mediator) or a thin knife, a set of screwdrivers (including cross and flat), tweezers and a sucker. Also, a dryer to soften the glue if the model is sealed. Make sure you have a screw folding container on hand so you don't lose them during operation.
- 🛠️ Precision screwdriver set (PH000, PH00) mount.
- 📱 Plastic mediator or thin plastic card for opening latches.
- 🔋 Tweezers with curved ends for extracting small parts and wires.
- 🔥 Hair dryer (construction or household) for careful heating of the body.
Pay special attention to clean hands and tools, fat and dirt can get on the contacts or inside the mechanism, which will lead to deterioration of the work, it is recommended to wipe all tools with alcohol before starting work, this will avoid contamination of internal components.
Design features of Enchen models
Xiaomi Enchen razors (BlackStone, Hummer, Sharp 3 and others) have similar architectures, but may differ in the way the nodes are attached. Most devices are made in the form factor "tubus" or "capsule", where all components are placed in a single cylindrical housing. The main elements are the cutting unit, motor, battery and control board.
Fixing is often done with hidden screws under rubber plugs or decorative rings. Some models use a combination of screws plus plastic latches. Understanding how your particular specimen is assembled will help avoid breaking the case when you open it.
⚠️ Attention: Models with markings IPX7 They're heavily sealed, and when they're disassembled, the integrity of the waterproof membranes will be compromised, and the device may lose its water protection.
Inside the case, there's usually a lithium-ion battery that's soldered to the board or connected through a connector, and the motor can be integrated into the control board or wired to it, and all of these elements are packed fairly tightly, so you need to be careful not to damage the insulation of the wires.
Step-by-step instruction: removal of the cutting unit
The first step is always to remove the top part, the cutting head, which is necessary to access the internal screws if they are hidden underneath, and depending on the model, the head can be removed by turning counterclockwise or simply snapping.
For rotary models (like BlackStone 3), you need to rotate the latch ring. If the head is sitting on the latch, use a plastic blade. Push the frame in several places around the perimeter, uniformly applying force. Sharp movements can break plastic guides.
☑️ Check before removing the head
Once you remove the outer mesh and the knives, you'll see the inner structure, often this is where the screws hold the main body, and carefully clean the area of hair and foam using dry brush or compressed air, and this will prevent debris from getting deeper inwards as you disassemble it further.
Opening of the main building and access to the board
The most difficult part is to separate the main body, visually inspect the tube for screws, which can be hidden under a logo, a rubber insert or a decorative ring at the bottom, and if there are no screws, then the body is held on powerful plastic latches.
Use a thin knife or mediator to open the case on the latches. Plug it into the junction of the halves of the body and carefully lead along the seam, while snapping the locks. A characteristic click will signal the successful release of the latches. Don't be afraid to apply moderate force, plastic in Xiaomi is usually strong enough, but fragile at the break.
| Model | Type of attachment | Location of screws | Difficulty |
|---|---|---|---|
| Enchen BlackStone 3 | Screws + latches | Under the removable head | Medium |
| Enchen Hummer | Latchers | Absent. | Tall. |
| Enchen Sharp 3 | Screws. | Downstairs. | Low. |
| Enchen Boost | Glue + latches | Absent. | Very high. |
Once the halves of the case are separated, you will have access to the battery pack and the circuit board. Be careful: the wires may be short, and a sharp opening of the case will cause them to break. First, estimate the length of the connections before completely spreading the halves to the sides.
Battery replacement and motor maintenance
The most common cause of disassembly is battery failure. Over time, the battery capacity drops and the razor stops holding the charge. Xiaomi Enchen models often use standard 18650 batteries or special flat batteries that can be replaced with analogues with similar dimensions and voltage (usually 3.7V).
To replace, you need to solder off the old battery. Pay attention to the polarity of the wires: red usually means plus (+), black - minus (-). When soldering a new element, use a soldering iron with a thin sting and do not overheat the battery to avoid bloating or fire. It is critical to observe polarity when connecting a new battery, otherwise the control board will burn instantly.
⚠️ Attention: Lithium batteries are sensitive to overheating. When soldering, keep the soldering iron stinger in contact no more than 2-3 Use flux to fast and high-quality soldering.
In parallel with the replacement of the battery, it is recommended to maintain the engine. A drop of oil for sewing machines or special lubricant for power tools will prolong the life of bearings. Remove the old lubricant if it dries, and apply a new one. This will eliminate extraneous noise and increase engine speed.
Where can I find the right battery?
Assembly of the device and check of performance
After repairs or cleaning, the assembly phase begins, it's done in reverse order, make sure all the wires are packed into their channels and not be clamped in the case, and improper stacking of wires is a common cause of failure immediately after assembly.
Connect the halves of the case, making sure the latches fall into place with a characteristic click. Twisting all the screws, but do not drag them to avoid tearing the thread in the plastic racks. If the model implies tightness, apply a thin layer of silicone sealant to the junction of the case before final assembly.
- 🔌 Check the connection of all plumes and connectors.
- 🔩 Make sure that no screw is left over.
- ⚡ Turn on the device and check the engine in all modes.
- 💧 If leakage is impaired, avoid contact with water.
Turn on the razor and let it run for a few seconds without a nozzle. Estimate the sound of the motor: it should be smooth, without grinding or interrupting. If everything is working correctly, put the cutting unit in place. Now your device is ready for use again.
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To check the quality of the soldering battery slightly shake the device. If the contact is unstable, the razor can spontaneously turn off or change the modes of operation.
Typical errors in disassembly
Beginners often make mistakes that lead to permanent damage, the most common of which is to use excessive force where you just need to find a hidden screw, and trying to break the case, which is held on the screws, is guaranteed to lead to cracks.
Another mistake is to ignore polarity when working with electronics, so even short-term closure of the battery contacts can disable the charge controller, and you should not use metal tools to pick inside the case next to the board, so as not to damage the tracks.
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The main principle of successful disassembly is consistency and lack of haste, each movement must be meaningful, and the effort must be dosed.
If you feel like a piece is not going, stop and re-examine the design. You may have missed some lock or screw. You can find video demolitions of specific Xiaomi Enchen models online to help visualize the process.