Disassembly Xiaomi Power Bank 10400 mAh: instructions with photos and repair tips

Xiaomi Mi Power Bank 10400 mAh (model number) PLM03ZM) — One of the brand's most popular portable chargers, released in 2015, which, despite being reliable, can eventually fail: the battery will inflate, stop holding a charge or fail. USB-Disassembly of the device will require diagnostics, battery replacement or control board repair, but the process has nuances, from hidden latches to the risk of damaging thin plumes.

In this article, we will take a step-by-step look at each stage’s photos, a list of tools to use and critical warnings to help avoid errors. We will also look at the typical Xiaomi 10400 malfunctions and how to fix them. If you’ve never been through electronics, don’t worry: the manual is tailored for beginners, but with all the technical details in mind.

Preparation for disassembly: tools and security measures

Before you start, you can pack everything you need, and without the right tools, you're at risk of damaging the body or tearing the plumes, and that's going to cost you more to repair.

• 🔧 Plastic mediators (2-3 - To carefully separate the latches. Metal screwdrivers can leave scratches!
• 🔨 Cross screwdriver (size) PH00 or PH0) — board-screw.
• 🧲 Magnetic mat or container – so as not to lose small parts (screws, springs).
• 🔥 Dryer or thermo-air station - if the body is glued (occurring in some batches).
• 📸 Smartphone – take pictures of each step so you don’t confuse the assembly order.

Important: Xiaomi 10400 does not have an official disassembly scheme from the manufacturer, you perform all manipulations at your own risk. If the device is warranty, you should contact the service center.

⚠️ Attention: The battery of the superbank can be bloated even without external signs. At the slightest suspicion (the body is deformed, it makes creaks) - do not disassemble it indoors! Take it outside and put it in a fireproof container. The risk of lithium-ion batteries burning should not be ignored.

Step 1: Removal of the upper body cover

The Xiaomi Power Bank 10400 has two halves held together by latches and (in some versions) glue. Start by inspecting the perimeter seam, which usually starts at the end of the seam. USB-Take a plastic pickup and gently insert it into the crevice:

1. Start with the upper right corner (from the charge indicators side).
2. Keep the mediator smoothly along the seam, turning the mounts off in turn. Don't force it, because if the body doesn't respond, there's a hidden latch or glue.
3. If the mediator rests, try the other side or slightly heat the body with a hairdryer (temperature not higher than 60 ° C).

Typical problems at this stage:

• 🔧 The latch at USB-Type-A ports often break down – be especially careful.
• 📱 If the case does not separate, check whether the screws are left inside (in some versions they are hidden under stickers).

Step 2: Removing the battery and control board

After removing the cover, you will see:

• 🔋 Battery (marking) LGC INR18650 or similar) - usually glued to the body.
• 🔌 Control board with chip IP5306 (charge/discharge).
• 🔌 USB-Type-A and Micro-USB ports (for charging) soldered to the board.

Procedure:

1. Disconnect the indicator plume (a thin white wire running from the board to the button) and it is attached to the connector, gently tuck it in with the mediator.
2. Unplug the battery. If it's swelling, don't prick it or bend it, it can short circuit! Use a plastic blade to put it on the edges.
3. Unscrew the control board (2-3 screws) and put it aside. Don't pull the wires!

Tip: If the battery is glued too much, heat the case with a hairdryer on the back (don't send hot air to the battery!) The glue will become softer and it will be easier to remove.

Typical malfunctions and their elimination

Once you've taken a look at the overbank, you might encounter a few common problems, and the table below is their causes and repairs:

If the problem is in the management fee, it can be replaced in its entirety (cost). ~500-800 Or try to repair it, for example, a frequent breakdown is a burned diode next to the USB-It can be soldered and replaced with a similar one (marking is usually used). SS14 or 1N5817).

⚠️ Warning: When soldering, use a soldering iron with a power of no more than 30 W and solder with a roanifoil. Overheating the board can disable the chip. IP5306, And then the repair will be economically inappropriate.

Battery Replacement: Selection and Installation

If the original Xiaomi 10400 battery is worn out, it can be replaced with a similar one.

1. Typical size: only 18650 (diameter 18 mm, length 65 mm).
2. Capacity: at least 3400 mAh (optimally 3500 mAh).
3. Discharge current: not lower than 2A (e.g. Samsung INR18650-35E or LG INR18650 MJ1).

Installation process:

1. So, you solder a new battery with a thermal sensor (a thin black wire with a thermocouple) from an old battery, and without it, the control board won't correctly display the charge level.
2. Secure the battery on double-sided tape or heat glue (don’t use superglue!).
3. Connect the plume of indicators and assemble the body in reverse order.

After the replacement, be sure to check:

• 🔋 Charging the verbank (connect to the network on the 2-3 hour).
• 🔌 Current return (plug the smartphone – the charge should begin).
• 📊 Correctness of indicators (all 4 LEDs should light up sequentially).

💡

If the battery is not switched on after the battery is replaced, check the polarity of the connection! Red wire is +, black wire is -. The tangled contacts can disable the control board.

Assembly of the body and final inspection

The Xiaomi Power Bank 10400 should be assembled carefully - any negligence can lead to short circuit or poor contact.

1. Put the control board in place and secure it with screws. USB-portages.
2. Connect the plume of the indicators. It should sit tightly in the connector — if there is a backlash, the charging may not work.
3. Close the body, starting from the side USB-The latches should click without effort.
4. Check the gaps around the perimeter - if the lid does not fit, then something interferes inside (the wire or battery is shifted).

After assembly, perform the test:

1. Connect the powerbank to charge for 30 minutes - the indicators should flash.
2. Connect the load (smartphone) - the discharge should begin.
3. Press the charge check button – all 4 indicators should catch fire and go out in 3 seconds.

⚠️ Note: If after assembly, the overbank warms or disconnects through 5-10 It's a sign of a short circuit or a board malfunction.

💡

The key to assembly is not to pull the screws on the board or bend the plume of the indicators, which leads to 80% of breakdowns after self-repair.

Frequent Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling the Xiaomi 10400, and here are the most common ones and ways to prevent them:

• 🔧 Broken case latches – use only plastic mediators, not screwdrivers or knives.
• 🔥 Overheating of the board when soldering - work with a soldering iron for no longer than 3 seconds on one contact.
• 📉 Incorrect battery polarity – always check the labeling "+" and "-" before connection.
• 🔌 Breaking the plume of indicators - do not pull the wires, but carefully lift the connector from both sides.

If you doubt your abilities, it is better to contact the service.Average cost of repair Xiaomi Power Bank 10400:

• Replacement of the battery - 800-1200 rubles.
• Repair of USB-port - 500-700 rubles.
• Replacement of the control board - 1000-1500 rubles.

Self-repairing is cheaper, but it requires care. If you've never soldered or worked with small electronics, practice on unnecessary devices before you take over the overbank.

FAQ: Answers to Frequent Questions