Xiaomi’s external batteries are known for their reliability, but even they sometimes require repairs: battery bloating, faulty USB-You can take apart Power Bank yourself, but the process requires care - the body is sealed, and inside there are elements that are sensitive to mechanical damage.
This guide will work for most Xiaomi Mi Power Bank models (including the 3 Pro, 4, 5, PLM03ZM, PLM05ZM and PLM06ZM 2022-2026), but note that the design may vary slightly. For example, budget versions often use ultrasonic welding instead of glue, and premium versions use additional screws under the seals.
Before you start, answer yourself the question: should I disassemble? If the problem is a software failure (for example, does not show the charge level), try first to reset the settings through a double press of the power button. If the case is swelling, the port is wobbling or the device does not hold a charge, you can not do without disassembly.
Preparation: security tools and measures
To disassemble Xiaomi Power Bank you will need:
- 🔧 Plastic mediators (or guitar mediators) – to avoid scratching the body.
- 🔨 Thin screwdriver with a flat sting (1-2 mm) or a specialized tool for opening smartphones.
- 🔥 Dryer or thermo-air station (if the body is glued with heat glue).
- 🧲 Magnetic screwdriver or tweezers - so as not to lose small screws.
- 📸 Smartphone for photography – fix the location of parts before disassembling!
⚠️ Warning: Do not use metal blades or knives - they will damage the plastic and can close contacts inside. USB-C Power Delivery (e.g., Power Delivery, PLM06ZM), Be especially careful: the high-voltage circuits are located close to the body.
Also prepare the workplace:
- 🪑 Work on a flat, clean surface without carpets (static electricity!).
- 🔋 Reduce Power Bank to 0% – This minimizes the risk of short circuit.
- 👓 Wear safety glasses if you use a hair dryer - when heated, the glue can splash.
💡
If you have a model with a display (for example, Xiaomi Mi Power Bank 3 Pro), before disassembling, remove the protective film from the screen - it can melt from heating.
Determine the type of mounting of the body
Xiaomi Power Bank can be attached in three ways:
- Glue (the most common option) - requires heating with a hair dryer.
- Ultrasonic welding (occurring in models until 2020) – it is almost impossible to disassemble without damage.
- Screws under stickers (premium models, for example, PLM06ZM) – you need to carefully remove the stickers.
To understand what type of model your model has:
- If you look at the seam between the halves of the body, if it's flat, it's probably glue. If there's a little protrusion, maybe welding.
- Shake the device. You hear the rattles inside? It could be detached glue or screws.
- Look at the stickers. If there are little holes underneath, there are screws hidden there.
🔍 Tip: If you are not sure, look at iFixit - there are disassemblies of specific models with photos.
How do you distinguish glue from welding?
Power Bank Xiaomi (Glue case)
Consider the most common case – disassembly of the model with adhesive attachment (for example, Mi Power Bank 4 10000mAh).
Step 1. Heat the body.
Turn the dryer on at 80-100°C and warm the seam evenly around the perimeter for 2-3 minutes. Keep the dryer at a distance of 5-7 cm so as not to melt the plastic. If you overheat the body above 120°C, the charge controller can damage - this is irreversible!
Step 2: Separating the halves
Insert a plastic mediator in the seam USB-- the port (there is usually weaker glue) and carefully lead along the hull, gradually increasing the gap.
Heat the entire perimeter of the seam |
The mediator is inserted in the thinnest place.|
No sudden movements - only smooth separation |
There's glue on hand. B-7000 reverse-assembly-->
Step 3: Extracting the fee
After the separation of the body, you will see:
- 🔋 Battery: Battery (usually 18650 or 21700).
- 📱 Controller board with USB-port and protection chip.
- 🔌 Connecting plumes (in models with display).
Carefully unplug the plumes (if any) and unscrew the circuit-fixing screws. Don't pull the wires - they're fragile!
💡
If the battery is swelling, do not try to pierce it! Carefully remove and dispose of it according to local rules (in Russia - to the reception points of Ecosystem).
Disassembly of models with screws (PLM06ZM and analogues)
In premium Xiaomi models (such as the PLM06ZM 20000mAh), the case is additionally fixed with screws under the stickers.
- Remove all stickers from the case (including the label with technical data).
- Under them you will see 2-4 screws under the cross screwdriver (PH00).
- Unscrew the screws and carefully disconnect the body with a mediator - the glue there is also, but it is less.
⚠️ Attention: In models with USB-C Power Delivery (e.g., Power Delivery, PLM06ZM) The controller board is a two-layer design. Don't pull on the top layer, first disconnect all the connectors!
If the sticker broke when removed, do not worry: after assembly, you can seal the case with transparent tape or buy new stickers on AliExpress (look for the model number).
Typical malfunctions and their elimination
Now that the building is open, let’s deal with the most common problems:
| Malfunction | Reason. | Decision |
|---|---|---|
| No charge from the grid. | Oxidation USB-port or controller failure | Clean the port with alcohol, check the fuse on the board |
| Not giving the phone a charge. | Protection against KZ or battery wear has worked | Check the voltage on the battery with a multimeter (should be 3.7-4.2V) |
| Bloating of the hull | Degradation of lithium-ion elements | Battery replacement (not repaired!) |
| Doesn't show the charge level. | Display plume or controller failure | Reconnect the plume, check the contacts |
🔧 Diagnostic tip: If Power Bank doesn't turn on, first check the voltage on the battery. 2.5V, The controller can block the charge, and in this case, the booster for Li-ion batteries (sold on AliExpress for 200-300) will help.₽).
If the problem is USB-It can be replaced by the port itself:
- Drain the old port with a soldering iron (30W, 300°C).
- Clear the contact areas with alcohol.
- Buy a new port on AliExpress for "USB Type-C female connector".
Power Bank assembly after repair
Getting the device back together is often harder than disassembling.
- 🧩 Check the location of all pads – they protect the board from vibration.
- 🔌 Connect the plumes last so as not to damage them during assembly.
- 🔥 Use the glue. B-7000 for sealing (apply a thin layer!).
- 🔧 Twisting the screws cross-cross to avoid skewing the body.
⚠️ Note: If Power Bank does not turn on after assembly, check:
- Are the contacts of the battery closed on the body (use the multimeter in the "vertebrae" mode).
- Is the display plume correctly connected (in models with a screen).
- Are the battery polarities confused (plus to plus, minus to minus!)
After assembly, let the glue dry for 12 to 24 hours before first use. If the case creaks, that's normal, the glue will eventually settle.
When disassembly is inappropriate
Not all Xiaomi Power Bank breakdowns can be repaired by yourself.
- 🔥 The controller board burned (blackened elements, the smell of burning).
- 💥 The battery swelled so much that it deformed the board.
- 🔌 USB-Port is torn with part of the tracks (microspike required).
- 📉 Capacity dropped by more than 50% (battery degradation is irreversible).
Cost of repair in the service:
- Replacement USB-port: 500–1000₽.
- Battery replacement: 1500–3000₽ (depending on capacity).
- Toll repairs: 2000₽+ (It is often cheaper to buy a new one).
💡 Alternative: If your Power Bank is older than 3 years, consider buying a new one.Modern models (e.g. Xiaomi Mi Power Bank 5) 20000mAh) support fast charging 30W They have better protection against overheating.