Xiaomi Power Bank 10000 2 Disassembly Full Guide with Photos and Repair Tips

Xiaomi Power Bank 10000 2 (model) PLM03ZM) — The task faced by owners when replacing the battery, repair USB-This overbank, launched in 2017, is still popular today for its reliability and capacity, but over time even it requires maintenance. Unlike newer models (e.g. Xiaomi Power Bank 3), the second version has a glue case, which makes it difficult to disassemble without damage.

In this article, you will find detailed instructions with photos of each stage, a list of necessary tools and unique tips for working with the control board, we will also analyze the typical errors that lead to failure of the device, and explain how to avoid damage to the charge controller BQ25703A, a key element of the circuit. If you plan to replace the battery with a more capacious one (for example, 18650 3500mAh), here you will learn what nuances to consider when soldering.

⚠️ Warning: Disassembling the overbank will void the warranty (if it is still valid) and may cause a fire if you mishandle lithium-ion cells. If you are unsure of your skills, contact the service center. Opening the case without experience is fraught with damage to flexible plumes or separation of contact platforms on the board.

1.Preparation: security tools and measures

Before you start disassembling, make sure you have everything you need. Xiaomi Power Bank 10000 2 is built on ultrasonic welding and glue, so a regular screwdriver will not be enough. Here is the full list of tools:

• 🔧 Plastic mediator (or guitar mediator) – to disconnect the body without scratches.
• 🔥 Hair dryer construction (or hair dryer with temperature) ≥80°C) - for softening the glue.
• 🔪 Knife with a thin blade (for example, stationery) - for smearing gaps.
• ⚙️ Screwdriver cross (PH00) — screw-off.
• 🧲 Magnetic mat – so as not to lose small details.
• 🔋 Multimeter – to check the voltage on the battery (optional).

Also, prepare your workspace: a table with good lighting, no carpeting (to keep your screws from going down). Be sure to discharge the overbank to 0%, which minimizes the risk of short circuits when you open it. If the battery is swollen, don't use a hair dryer, heating can trigger a fire.

⚠️ Warning: Do not disassemble the superbank near an open flame or flammable materials. Lithium-ion batteries 18650 can release toxic gases when damaged.

2. Opening of the body: step-by-step instructions with a photo

The Xiaomi Power Bank 10000 2 has two halves glued around the perimeter, and the challenge is not to damage the rubber legs and the charge indicator when you disconnect.

1. Glue heating: Turn on the dryer at a medium power (temperature ~80-100 ° C) and evenly warm the body seam around the perimeter for 2-3 minutes. This will soften the glue and facilitate separation.
2. Misrepresentation by the mediator: Insert the plastic mediator into the gap between the halves of the case (start with the corner next to the USB-Carefully drive the mediator along the seam, gradually increasing the gap.
3. Disconnect: When the mediator passes around the perimeter, carefully separate the halves of the body. If you feel resistance, warm up the problem area again with a hairdryer.

📸 Photos of stages:

• 🔍 Step 1: Warming up the seam with a hair dryer (keep the hair dryer at a distance of 5-7 cm).
• 🔧 Step 2: Mediator inserted into the corner of the body.
• 🔋 Step 3: Body is split, battery board visible.

⚠️ Warning: Do not use metal tools to tamper with - they can scratch the body or close contacts on the board. If the glue is too strong, repeat the heating.

3. Removal of boards and batteries: what you need to know

When you open the case, you'll see two 18650 lithium-ion batteries connected in parallel, and a control board with USB-Type-A ports, soldered to the board with thin wires that can be easily torn off when handled carelessly.

🔧 Procedures for action:

1. Unscrew 4 screws (two y) USB-ports, two at the indicator) with a screwdriver PH00.
2. Carefully raise the charge, don't pull the wires! Unplug the battery connector (white connector) or unplug the wires if there's no connector.
3. Remove the batteries. They can be secured with double-sided tape -- put a mediator on them.

📊 Technical characteristics of batteries:

⚠️ Warning: If batteries are bloated, don't try to puncture or bend them! Dispose of them at special reception points. Use elements of the same capacity and protective board to replace them (for example, Samsung). INR18650-35E).

Diagnosis of malfunctions: management fee and USB-port

If the overbank does not charge or does not give current, the problem may lie in the control board or USB-Check out the following elements:

• 🔌 USB-Ports: Check for oxidation or bent contacts. Clean them with alcohol and brush.
• 🔥 Safety: The charger may be placed on the board SMD-safety-guard (marking) F1). Call it with a multimeter - resistance should be close to 0 ohms.
• 🔋 Charge Controller: Microchip BQ25703A (Or similar) is responsible for controlling the charge. If it overheats, it needs to be replaced.
• 📶 Charge indicator: Check the LED circuit - often they burn out when voltage surges.

🔍 Typical malfunctions:

💡

If the superbank is turned on, but discharges quickly, check the capacity of the batteries using USB-Normal capacity after 2-3 years of operation - 60-70% of the nominal capacity.

5. Battery replacement: cell selection and soldering

The 18650 batteries in Xiaomi Power Bank 10000 2 lose capacity over time.

• 🔋 Samsung INR18650-35E — capacity 3500 mAh, maximum current 8 And.
• 🔋 LG INR18650 MJ1 — capacity of 3500 mAh, current 10 A.
• 🔋 Panasonic NCR18650B — Capacity 3400 mAh, current 4.8 A.

🔧 Instructions for replacement:

1. Seal the new batteries in parallel, keeping polarity. Use a heat shrink tube to isolate the contacts.
2. Check the voltage at the output of the board with a multimeter - it should be 5 V ± 0.2 V.
3. Secure the batteries with double-sided tape or heat-glue to avoid vibrations.

⚠️ Warning: Do not use batteries with different capacity or degree of wear - this will lead to uneven charge and shortened life. Also avoid soldering without flux - this can cause cold soldering and poor contact.

💡

When replacing batteries, be sure to calibrate the controller: completely discharge and charge the overbank 2-3 times for the correct display of the charge level.

6. Assembly of the case: how to avoid creaks and gaps

After repair, it is important to assemble the body so that it does not creak and has no gaps.

• 🧴 Glue: Use bilateral scotch 3M or a special plastic glue (e.g. Loctite 406.
• 🔧 Screws: Tighten them cross-to-cross to avoid skewing the body.
• 🔥 Drying: If you used glue, leave the overbank under a press (for example, under a stack of books) for 12-24 hours.

🔍 Post-assembly check:

1. Connect the verbank to the charging and make sure the indicator is on.
2. Check the output voltage with a multimeter - it should be 5 V.
3. Connect the load (for example, a smartphone) and make sure that the charge is coming.

⚠️ Note: If after assembly the overbank warms up stronger than usual, immediately turn it off - this may indicate a short circuit in the chain.

7. Frequent mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when disassembling Xiaomi Power Bank 10000 2.

• 🔥 Dryer overheating can cause swelling. Solution: only heat the shell seam without directing air flow to the batteries.
• 🔧 Using metal tools, scratches the case and can close the board. Solution: use only plastic mediators.
• 🔋 Incorrect soldering of batteries - cold soldering or overheating of contacts. Solution: use flux and soldering iron with temperature adjustment (max. 300)°C).
• 📶 Loss of screws or spring contacts - without them, the body will dangle.Solution: run on a magnetic mat.

FAQ: Answers to popular questions