Xiaomi Powerbank is not charged: all the reasons and ways to fix

Have you connected a power bank to an outlet, but the indicators don't burn, and the charge level doesn't change? Or does the device only charge from certain power units but refuses to work with charging from the phone? The charging problems of Xiaomi power banks are one of the most common malfunctions faced by owners of Mi Power Bank 3, Redmi Power Bank, Xiaomi PLM and others. In 80% of cases, the cause can be fixed independently without going to the service center.

In this article, we'll look at all the possible reasons why Xiaomi's power bank might not charge, from the banal contamination of connectors to the failure of the charge controller, you'll get step-by-step instructions from the photo, charger compatibility tables, and diagnostic tips to determine exactly what broke. If your power bank is still under warranty, we'll give you a tip on how to keep it from being lost when you try to repair it.

1. Checking for obvious reasons: cable, power supply, socket

Before you take a power bank apart or bring it into service, eliminate external factors. In 30 percent of cases, the problem is not the device itself, but the wrong power source or damaged cable.

• 🔌 Try another outlet. Sometimes it's not the power bank that's to blame, it's the lack of power, and plug a phone or a lamp into that same outlet -- if they don't work, the wiring is the problem.
• 📱 Use the original cable. Xiaomi power banks are sensitive to the quality of USB- cables. Cheap uncertified wires may not provide enough current to charge.
• ⚡ Check the power supply. The charger must have a power of at least 10W (5V/2A). If you use a phone charger, make sure it supports Quick Charge or Power Delivery (for Type-C models).

Pay special attention to the Micro-USB or Type-C connector on the powerbank. Often there will be dust, dirt or oxides inside that interfere with contact. Take a flashlight and inspect the port: if you see foreign particles, clean them carefully with a toothpick or compressed air. Never use metal objects - they can close the contacts!

Diagnostics of indicators: what do flashing light bulbs mean

Xiaomi power banks are equipped with light indicators that signal the state of charge and possible malfunctions.

If Xiaomi Mi Power Bank 3 Pro or another Type-C model doesn't respond to the cable connection, but the indicators are on fire, it's probably a problem with the power controller. It's a chip that regulates the charge/discharge current. When it fails, the power bank may think it's already charged, when the battery is actually empty.

💡

If the lights only light up when you press a button, but immediately go out, this is a sign of a deep discharge of the battery. Try to wake it up by connecting it to a power source with a current of 1A for 12+ hours.

3. Powerbank Reset: How to Make a Hard Reset

Many people don’t know, but Xiaomi power banks (especially Quick Charge models) have built-in protection that can block charging in emergency situations, such as if the device overheated or was connected to an incompatible power source, in which case hardware reset helps.

Resetting instructions for most models:

1. Disconnect all cables from the device

2. Press and hold the switch on 10-15 seconds

3. Connect to the charger (indicators should flash)

4. Wait for a full reboot (up to 1 minute)-->

If the reset didn’t help, try an alternative method for Type-C models:

1. Connect the power bank to the charger.
2. Hold the power button for 20 seconds (even if the indicators don’t respond).
3. Release the button and wait 30 seconds. Re-attempt charging.

On some power banks (e.g. Xiaomi PLM10), the reset is done by double pressing a button at intervals of 1 second. If you are not sure about the model, try all the options.

4. Powerbank Disassembly: What You Can Fix Yourself

If external checks fail, you'll have to look inside the device. Attention: disassembling the power bank gives you no warranty (if it's still in place), but for models older than 1-2 years, it's often the only way to get back to work.

You'll need:

• 🔧 Plastic blade or mediator (to open the housing)
• 🔍 Loupa (for inspection of fees)
• 🧴 Isopropyl alcohol (for cleaning contacts)
• 🔥 Fen (for drying after cleaning)

Step-by-step:

1. Remove the stickers from the case - there may be hidden screws underneath them.
2. Carefully slid the body around the perimeter. Xiaomi models are usually glued together, so be careful not to break the latches.
3. Look at the board for: Bloated capacitors (they'll be convex on top), darkening or burnt tracks, oxidized battery contacts.

Clear the contacts.

Check the integrity of the wires.

💡

If the battery is swelling, it's dangerous to use the power bank! These batteries can ignite. The only way out is to replace it with a new one (cost ~500-1500 ₽ depending on capacity).

Once dismantled and cleaned, assemble the device and try to charge, and if the problem persists, the charge controller (the circuit on the board) is likely to be faulty, and replacing it requires soldering skills and trusting the professionals better.

5. Battery problems: how to check and replace the battery

The average battery life in a power bank is 300 to 500 charge cycles, and then the capacity drops by 20 to 30 percent, and the device may stop charging altogether, and if your Xiaomi lasts more than 2-3 years, the problem is probably the battery.

Signs of a "dying" battery:

• ⚡ Powerbank only charges to 1-2 indicators, then shuts down.
• 🔥 The body warms more than usual when charging.
• ⏳ Battery life has been reduced by 2 to 3 times.
• 📉 The indicators are 100%, but the device discharges in 5 minutes.

Check the status of the battery can be multimeter:

1. Disassemble the power bank and disconnect the battery from the fee.
2. Put the multimeter in voltage measurement mode (DC, 20V).
3. Connect the probes to the battery contacts (red to +, black to -).
4. Compare the readings to the norm: 3.7V-4.2V - battery is good. 3.0V-3.6V - deep discharge, recovery is required. Below 2.8V - battery dead, replacement is required.

If the voltage is lower than 3.0V, you can Attempt to revive the battery using a specialized charger like the TP4056 module (available on AliExpress for ~200 ₽). Connect the battery to the module, set the current to 0.5A, and charge for 1–2 hours. If the voltage does not rise above 3.3V, the battery is dead and must be replaced.

💡

When buying a new battery for Xiaomi power bank, pay attention to capacity and size. For example, Mi Power Bank 2 will suit the battery 18650 3.7V 10000mAh with overcharging protection. Don't take cheap "no-name" batteries - they can swell in a month.

6.Problems with the charge controller: symptoms and solutions

The charge controller is the brain of the power bank, which controls the charge/discharge current, protects against short circuit and overheating, and if it fails, the device can:

• 🚫 Completely refuse to charge.
• ⚡ Charge only from certain power supplies.
• 🔥 Overheat and shut down 5 minutes after connection.
• 📉 Show an incorrect charge level (e.g. 100% at a real 20%).

The most common causes of controller failure:

1. A voltage surge (for example, if the power bank was connected to a faulty power supply).
2. Short circuit due to moisture or metal particles entering the connector.
3. Overheating (if the device was lying in the sun for a long time or charged under load).

Diagnosing a faulty controller can be based on the following signs:

• Powerbank is defined as Unknown Device when connected to a PC.
• The indicators burn chaoticly or do not correspond to the real charge.
• The device is charged in only one position of the cable (for example, if it is held with your hand).

The problem can be solved in two ways:

1. Reflash the controller (if it is a model with updated firmware, for example, Xiaomi Mi Power Bank 3).
2. Replace the controller board (cost ~800-1500 ₽) is a complex operation that requires a soldering iron and experience.

💡

If Xiaomi power bank stopped charging after a fall or impact, 90% of the time it is the fault of the tracks on the controller board. You can restore them with a thin wire, but it is better to trust this to a specialist.

7. When to contact the service: prices and warranty cases

If all these methods did not help, and the power bank is still not charged, it is time to contact the service center.

• 🔧 Warranty device (usually 12 months from the date of purchase)
• 💥 Powerbank is swelling, warming, or making extraneous sounds (hisping, crackling).
• 🔌 The problem occurred after moisture or mechanical damage.

Cost of repair in unofficial services:

Official Xiaomi service centers in Russia:

• Moscow: 16 Leo Tolstoy St. (at the Atrium shopping center).
• St. Petersburg: 108 Ligovsky Avenue (in the Leroy Merlin hypermarket).
• Kazan: 130 Decembristov Street (in the shopping center "Ring").

Before the service visit:

1. Check checks and warranty card (if the device is warranty).
2. Reset the powerbank to factory settings (if possible).
3. Make sure the problem isn’t with the cable or power supply (take them with you for the test).

💡

If Xiaomi Power Bank is purchased on AliExpress, the warranty can be issued through the platform within 15 days from the date of receipt, you need to open the dispute and attach a video demonstrating the malfunction.

FAQ: Frequent questions about charging Xiaomi power banks