Power Bank Xiaomi disassembly: a complete analysis with photos and repair tips

Xiaomi’s Power Bank may need to be dismantled for many reasons, from replacing a bloated battery to repairing it. USB-But this process requires caution, because there are hidden elements inside the enclosure that, if handled carelessly, can fail or even become a source of danger. In this article, we will discuss in detail how to properly open Xiaomi power bank (including popular models at 10,000 mAh and 20,000 mAh), what tools you will need, and what to pay attention to not damage the device.

It's important to understand that when you break up Power Bank, it's not guaranteed (if it's still in place), and if you do something wrong, it can lead to a short circuit or fire. If you're not sure about your skills, you better go to the service center, but if you decide to do it yourself, follow our instructions Step-by-step.

What Xiaomi Power Bank models can be disassembled independently

Not all Xiaomi power banks are equally easy to understand, for example, all-metal models (like Mi Power Bank 3) require special tools, while plastic versions (like Redmi Power Bank 10000mAh) are easier to understand.

• 🔋 Xiaomi Mi Power Bank 2C (10000mAh) — plastic case, latch attachments.
• 🔋 Xiaomi Mi Power Bank 3 (20000mAh) — metal case, requires a screwdriver with a Torx nozzle T5.
• 🔋 Redmi Power Bank (10000mAh, 20000mAh) — plastic, latches + glue.
• 🔋 Xiaomi Mi Power Bank Pro (10000mAh) — aluminum case, complex disassembly.

Models with built-in cable (such as Xiaomi Mi Power Bank Wireless) are harder to disassemble because of the additional wireless coil mounts. If your model is not listed, check its case for screws or seams, which will tell you which method of disassembly is suitable.

Preparation: security tools and measures

Before you start dismantling, prepare the workspace and tools.

• 🔧 Plastic mediators (or guitar mediators) – to disconnect the body without scratches.
• 🔧 Screwdrivers: cross-haired (PH00), flat, Torx nozzle T5 (metallic).
• 🔧 Tweezers – to extract small details.
• 🔧 Multimeter – to check the voltage on the board after disassembly.
• 🔧 Insulation or thermal glue - for fixing the battery during reverse assembly.

Also, be sure to follow safety measures:

• ⚡ Work on a non-conductive surface (wooden table, rubber mat).
• ⚡ Do not use metal tools to disconnect the battery – this can cause a circuit.
• ⚡ If the battery is swelling, don't prick it, it's dangerous.

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Before disassembly, completely discharge Power Bank - this will reduce the risk of short circuit when working with the board.

How to Disassemble Xiaomi Power Bank

Consider the Xiaomi Mi Power Bank 2C (10000mAh), one of the most popular models, and the steps may vary slightly for other devices.

Step 1: Removal of the upper cover

The Mi Power Bank 2C is latched around the perimeter to open it.

1. Insert a plastic mediator into the gap between the top and bottom of the case (start with the corner next to the USB-port).
2. Carefully swipe the mediator along the seam, alternately snapping the mounts. Don't put too much effort into it, the plastic can crack.
3. When all the latches are free, remove the top cover, and underneath it you'll see the battery and the control board.

Step 2: Battery disconnection

The battery in Xiaomi Power Bank is soldered to the board with two wires: + (red) and - (black).

1. Take a picture of the location of the wires – this will help with the reverse assembly.
2. Heat the contacts with a soldering iron (temperature not higher than 300 ° C) and carefully remove the wires with tweezers.
3. Check the voltage on the board with a multimeter - it should be 0 V (if the device is discharged).

⚠️ Warning: If the battery is swelling, don't try to solder it! The risk of fire is extremely high.

Step 3: Removing the control board

The board is attached to the case on screws or scotch. In Mi Power Bank 2C, it is fixed with two screws (PH00):

1. Unscrew the screws and gently tuck the board with a plastic mediator.
2. Disconnect the plumes (if any) or wires leading to USB-port.
3. Check the board for darkening or burned items - these are signs of malfunction.

If you're disassembling Mi Power Bank 3 (20000mAh), the board can be glued to the case, in which case use isopropyl alcohol to dissolve the glue.

Frequent problems and how to avoid them

When disassembling Xiaomi Power Bank, users often encounter common errors that can make a device fail, and here are the most common ones and ways to prevent them:

Critical error: Trying to disassemble the Power Bank with a knife or screwdriver without insulation, almost guaranteed to cause the board to close and fail.

How to replace the battery in Xiaomi Power Bank

If the original battery is lost or swelled, it can be replaced, with 18650 batteries (for 10,000 mAh models) or 21700 batteries (for 20,000 mAh), which are the same as the battery:

• 🔋 Voltage: 3.7 V (standard for Li-ion).
• 🔋 Capacity: not lower than the original (for example, for 10000mAh take 2× 3.7V 3500mAh).
• 🔋 Protection: with built-in board BMS (charge-balancing).

Replacement process:

1. Buy batteries with soldered wires or solder them yourself (observing polarity!).
2. Install new batteries in the case, fixing them with thermal glue.
3. Connect the wires to the control board (red to +, black to -).
4. Check the Power Bank multimeter before final assembly.

⚠️ Note: Use of batteries without protection BMS It can cause overheating and fire. Don't skimp on safety!

Power Bank assembly after disassembly

Getting Xiaomi Power Bank back together is often harder than disassembling. Follow these tips to avoid problems:

• 🔧 Make sure all wires are connected correctly and not twisted.
• 🔧 Secure the battery with heat glue or tape so that it does not hang inside.
• 🔧 Make sure the latches of the case are fixed before clicking - otherwise the device may fall apart when falling.
• 🔧 Before first use, fully charge and discharge the power bank (calibration).

If the Power Bank is not included after assembly:

1. Check the multimeter voltage at the exit USB-port (should be 5 V).
2. Make sure the control board has no visual damage.
3. Try connecting another charger - perhaps the problem is the cable.

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If the lights are on after assembly, but they're not charging, it's likely that the charge controller on the board is damaged, and you need to replace the chip or the entire board.

Where to buy spare parts for repair

If you need original or compatible parts for Xiaomi Power Bank, check out these resources:

When buying batteries, give preference to proven brands: Samsung, LG, Panasonic. Avoid cheap no-name batteries - they often have understated capacity and lack of protection.

FAQ: Frequent questions about the dismantling of Xiaomi Power Bank