How to disassemble the charging unit Xiaomi: detailed instructions with photos and repair tips

Xiaomi chargers are notoriously reliable, but even they fail over time, stop keeping contact, overheat or do not show signs of life. Most of the time, the problem lies in oxidized contacts, swollen capacitors or wires break — all of which can be fixed on their own without having to buy a new unit. However, disassembling the charger requires care: there is no room for error inside, and improper actions can lead to a short circuit or even a fire.

In this article you will find step-by-step instructions for disassembling Xiaomi power supplies of different capacities - from standard ones. 5V/2A fast-moving 33W and 65W. We'll figure out what tools you need, how to avoid common mistakes, and what to do if the case is "unresistible." And for those who are afraid of damaging the device, we'll give you alternative diagnostic methods without opening. If you have never held a soldering iron in your hands, it is better to entrust the repair to a specialist - but for experienced users, this instruction will be a reliable guide.

What Xiaomi charging blocks can be disassembled independently

Not all Xiaomi chargers are disassemblable at home, and here are some key points to consider before you start:

• 🔌 Standard blocks (5V/2A, 10W) — They're the easiest to disassemble, and they're usually glued together, but you can carefully cut the seam with a knife or a mediator.
• ⚡ Fast charging (18W, 33W, 65W) — Often have more complex designs with latches or even screws under the seal. Mi Charge Turbo models may require special tools.
• 🚫 Wireless charging (Qi-standard) – not recommended for disassembly due to fragile coil and risk of chip damage.
• 🔧 Charging with USB-C (For example, Xiaomi HyperCharge 120W) — have enhanced protection against moisture and dust, which makes it difficult to open without damaging the body.

Special attention should be paid to models with GaN certification (gallium nitride transistors), their internal filling is smaller, but more sensitive to static electricity. 65W), Prepare an antistatic bracelet or work on a grounded surface.

Tools and workplace preparation required

To disassemble the Xiaomi charging unit, you will need a minimum set of tools, but each of them must be of quality. Saving on a plastic mediator or a blunt knife can turn into a chipped case or slashed fingers.

Prepare a workspace, which should be well lit, without carpeting (the risk of static electricity), and with minimal foreign objects. Put a white sheet of paper on the table, and it will show even small details if they fall out of the case. USB-C, Prepare a multimeter to check contacts after assembly.

⚠️ Warning: Never disassemble a charger connected to the grid! Even if it doesn't work, the capacitors can retain charge for up to a few minutes.

Step-by-step: how to disassemble the charging unit Xiaomi

The disassembly process depends on the type of case, and we'll look at the two most common options: glued housing (standard charging). 5V/2A) and the sleeve with the sleeves (fast chargers) 18W+).

Option 1: Glued housing (models) 5V/2A, 10W)

These blocks are the easiest to disassemble, but they require patience, and the challenge is not to damage the plastic when you split the halves.

Warm up the body with a hairdryer (1-2 minutes) to soften the glue|

Insert the mediator in the seam between the halves of the body|

Carefully drive the mediator around the perimeter, loosening the body|

Don’t force it – if you don’t give in, warm it up again.

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1. Place the charger on your side. Find the seam between the top and bottom of the body, which is usually barely visible, but can be felt with your nail.
2. Insert a plastic mediator into the seam and carefully guide along the perimeter, slightly loosening the body. If you feel resistance, warm up the place with a hairdryer (temperature). 60-80°C).
3. As soon as the mediator passes 2/3 You can separate the body half by hand, and be careful, there may be spring contacts inside that pop out when you move abruptly.
4. If the body does not lend itself, try to scroll the mediator around its axis - this helps to separate the glued surfaces.

Option 2: Latched shell with screws (models) 18W, 33W, 65W)

High-powered units often have hidden screws under stickers or warranty seals, which must be removed to get to the insides.

1. Remove all the stickers from the case. Torx screws may be hiding underneath them. T5 or T6. If the sticker does not peel off, warm it with a hair dryer - the glue will become softer.
2. Unscrew all the screws. In some models (for example, Xiaomi Mi Charge Turbo) screws can be of different lengths - remember their location so as not to confuse when you build.
3. Put the mediator in the seam and carefully separate the halves, and unlike the glued blocks, here the body is held on plastic latches, which can break when exposed to rough.
4. If the body doesn't detach, make sure all the screws are twisted. Sometimes the manufacturer hides them under rubber legs.

When you open the case, you'll see a circuit board attached to the screws or filled with heatpaste. Take your time to take it out, take a picture of the layout of all the elements first, especially if you're planning to solder.

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If you find rust on the contacts during the disassembly USB-purify them with an alcohol solution (isopropyl alcohol 90%+). Do not use sandpaper – it will damage the gilded coating!

Typical malfunctions and how to fix them

In 80 percent of cases, Xiaomi's charging units fail for three reasons: contact oxidation, capacitor bloating, or circuit breaks on the board. Let's look at each issue in detail.

1.Oxidation USB-contact

If the charging "does not see" the cable or periodically shuts down, oxidized contacts are to blame. USB-To clean them up:

• 🧴 Wipe the contacts with a cotton swab soaked in isopropyl alcohol.
• 🔍 Inspect the port for foreign objects (dust, debris, bent contacts).
• 🔧 If the contacts are bent, straighten them gently with a toothpick.

2. Bloated capacitors

If the unit overheats or does not give out the declared power, check the capacitors on the board.

1. Drain out a faulty condenser using a soldering iron 30-40W and the sanctuary (to avoid overheating the charge).
2. Install a new capacitor with the same parameters (capacity, voltage). For units Xiaomi usually use capacitors 1000 μF. 16V 470 μF 25V.
3. Check the fee for microcracks – they can appear when overheating.

3. Breakage of tracks or burnt-out elements

If the block doesn't show any signs of life, the problem may lie in a fuse, diode, or resistor that has burned out.

• 🔍 Check the board under the magnifier - look for blackened or bloated items.
• 📊 Call the circuit with a multimeter in vertebrae mode (200 ohms). +5V and GND It must be infinite (otherwise short circuit).
• 🔧 Replace burnt-out resistors or diodes with similar ones. The fuse (if any) can be temporarily replaced with a lintel made of thin wire, but this solution is short-lived.

⚠️ Note: If there is a controller chip on the board (usually marked as MP2307, SC8551 And don't try to solder it out without experience, because these chips are sensitive to statics and overheating, and 90 percent of the time, it's easier to buy a new unit than to repair a burnt chip.

How to assemble a charging unit after repair

Assembly is as important as disassembly, and if you don't connect the halves of the body or squeeze the wires, the unit may overheat or not work at all.

Make sure all screws are in place (not lost or superfluous)|

Check if the wires are between the halves of the body|

Apply a thin layer of heat paste on the radiator (if any)|

Call the multimeter entry/exit to the short circuit

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Glued-in case (5V/2A)

For reliable fixation of halves of the body:

1. Apply a thin layer of superglue (gel) or heat glue around the perimeter. Avoid getting glue inside!
2. Squeeze the halves of the body with a scab or screeds on 10-15 minute.
3. Remove excess glue with acetone or white spirit before it solidifies.

Body on the latches (18W+)

The key here is not to break the plastic locks.

1. Make sure all latches are in the slots. If the case doesn't close, check if the wire is disturbing.
2. Turn the screws backwards. Don't pull them over, easy enough.
3. Stick back the warranty stickers (if saved). You can use a heat shrink tube for aesthetics.

After assembly, be sure to check the block:

• 🔌 Connect to the socket and check if it sparkles.
• 📱 Connect the phone – charging should start immediately, without interruption.
• 🔥 Through 10-15 Check the temperature of the body for a minute – it should not be heated higher. 40-45°C.

(1) Correct connection USB-port-to-board.

(2) Integrity of tracks (possibly wired during assembly).

(3) Polarity of capacitors (if replaced)

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What to do if the block is not disassemblable

Sometimes the case of the Xiaomi charger is so firmly glued or sealed that it is impossible to disassemble it without damage.

• 🔥 Warm up the body with a hair dryer at temperature 80-100°C during 3-5 Thermoclea will soften and the seam will be easier to uncouple.
• 🧊 If the glue does not lend itself, try to freeze the block in the freezer on the 1-2 The plastic will become brittle, and the body can be gently split at the seam.
• 🔨 For blocks with a metal body (for example, Xiaomi GaN) 65W) You may need a mini drill to drill rivets.

If none of the methods worked and the unit still doesn't work, it might be more appropriate to buy a new one. Xiaomi's original chargers start at 300 rubles, and the risk of damaging hands or equipment if forced autopsy is not justified.

⚠️ Warning: Do not attempt to disassemble cast-insulated units (such as some Redmi models) whose body is covered with compounds and the opening is impossible without special equipment.

Alternative methods of diagnosis without disassembly

You don't always have to disassemble the charger to understand the cause of the malfunction, and here are some ways to diagnose it without opening it:

• 🔌 Multimeter check: Set the mode DC 20V and measure the voltage at the exit. USB-For standard blocks, it should be 5V ± 0.2V, for fast charging, before 20V (depending on the protocol).
• 📱 Testing with another cable: Often the problem lies not in the block, but in the damaged one. USB-Try charging your phone with the original Xiaomi cable.
• 🔥 Heat check: Connect the unit to the outlet for 10 minutes. if it heats above 50°C without load - inside a short circuit.
• 🔍 External inspection: Blackened spots, melted plastic or the smell of burns indicate a breakdown of capacitors or transistors.

If the unit is giving off voltage but the phone is not charging, the problem may be in the fast charging protocol, for example, Xiaomi smartphones require a special handshake between the unit and the device, in which case:

• Reset Charging Settings in the Settings menu → Battery → Charging settings.
• Update the firmware of the phone (sometimes software bugs block charging).

FAQ: Frequent questions about disassembling Xiaomi charging units