Why Xiaomi Power Bank is not charged and how to fix it

Did you plug Xiaomi Power Bank into the outlet, but the indicators don't burn, and the percentage of charge does not increase? Or does the device show charging, but the battery remains at zero for hours? This problem is familiar to many owners of external Xiaomi batteries - from the budget Mi Power Bank. 2C to the flagship Xiaomi HyperCharge 20000mAh. In 80% of cases, the fault can be fixed independently without contacting the service center.

In this article, we'll look at all the possible reasons why the superbank stopped charging, from simple cable damage to complex hardware failures. You'll learn how to diagnose a problem by the behavior of indicators, what tools you'll need to repair, and when to really carry the device to the workshop. And for the most common models — Redmi Power Bank, Mi Power Bank 3 Pro and Xiaomi Ultra Compact — we've prepared separate charger compatibility tables.

If your superbank stops charging after a fall into the water or a heavy impact, do not try to turn it on - this can lead to a short circuit.

1. Check of cable and charger

Start with the simplest: 9 out of 10 problems with charging Xiaomi overbanks are related to a faulty cable or power supply. Even if your cable looks whole, the veins inside could have damaged - especially if you often twist it or store it in a strained state.

Here’s how to check the cable and charger:

• 🔌 Connect the power bank to another charger (preferably the original one from Xiaomi with Quick Charge 3.0 or Power Delivery support.
• 🔄 Try another cable (better from a Xiaomi or Redmi smartphone bundle) if the power bank starts charging, replace the old cable.
• 📱 Connect the charger to another gadget (smartphone or tablet) If it doesn't work and there, the power supply or cable is faulty.
• 🔍 Check the connectors: USB-Type C or Micro-USB should be free of foreign objects (dust, dirt, oxidation). If necessary, gently clean the contacts with an alcohol wipe.

Note that Xiaomi power banks are sensitive to cable quality. Cheap uncertified wires can not only slow charging, but also completely block it due to resistance mismatch. If you use a third-party cable, try the original one.

Diagnostics on charging indicators

The indicators on the case of Xiaomi's superbank can tell you a lot about the cause of the malfunction. Depending on the model, you may have:

• 🔘 4 LED-The indicator (Mi Power Bank) 2C/3C, Redmi Power Bank – show the charge level and charging status.
• 📊 Digital display (Xiaomi Mi Power Bank 3 Pro, HyperCharge) – displays the percentage of charge and voltage.
• 🔄 One flashing indicator (in ultracompact models) – signals errors.

Decoding the behavior of indicators:

If your model has an on button (for example, Xiaomi Mi Power Bank 3), press it once - sometimes the overbank "falls asleep" and does not respond to the connection to the network. If the indicators light up, but charging is not going, move to the next section.

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If Xiaomi’s overbank is not charging from a laptop or computer, try connecting it to the outlet via an adapter. USB-PC ports often don’t give out enough current (less than 1A), and the device may ignore such charging.

3. Battery problems: bloating, wear, deep discharge

The lithium-ion and lithium-polymer batteries used in Xiaomi’s overbanks have a limited lifespan, typically 300 to 500 charge cycles, and then the capacity starts to plummet and the device may stop charging altogether, and here are the signs that the battery is a problem:

• 🔋 The overbank discharges quickly (for example, from 100% to 0% per hour without loading).
• 🔥 The body is swollen or deformed (this is very dangerous - stop using immediately!).
• ⚡ The device charges only to a certain percentage (e.g., up to 80%) and stops.
• 🕒 Charging is extremely slow (more than 10 hours to 100 hours%).

If the battery is bloated, don't try to repair it, it can lead to fire, and these are only recyclable, otherwise you can try to "reanimate" the battery:

☑️ What to do if the battery of the superbank is worn out

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To check the battery with a multimeter:

1. Disassemble the body of the overbank (carefully so as not to damage the fee!).
2. Connect the multimeter probes to the battery contacts (+ and -).
3. If the voltage is below 3.0V, the battery is deeply discharged and may not recover.
4. If the voltage is higher than 4.3V, the battery is faulty and needs to be replaced.

4. Charging controller failure: how to reset settings

The charging controller is a chip that controls the charging and discharging process of the overbank, and if it fails, the device can:

• 🚫 Refuse to charge completely.
• ⚡ Charge only to a certain percentage (e.g. up to 60%).
• 🔄 Cyclically turn on and off when connecting to the network.

In most cases, resetting the controller helps. Here's how to do it:

☑️ Reset of Xiaomi Power Bank controller

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For some models (e.g. Xiaomi Mi Power Bank 3 Pro) there is an alternative method:

1. Connect the verbank to the charger.
2. Press the power button for 10-15 seconds.
3. Release the button and wait 1-2 minutes.
4. If the indicators flashed or changed color, the reset was successful.

If the reset didn't work, the problem might be the controller's firmware, which would require a reflash of the chip using a programmer (e.g., a programmer, CH341A), But that's a task for the service center.

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Never use chargers with a current greater than 2.4A to reset the controller, which can permanently disable the chip.

5. Overheating and protection against high temperatures

Xiaomi superbanks are equipped with a system of protection against overheating, if the temperature inside the case exceeds 50-60°C, the controller automatically turns off the charging:

• ☀️ If the device is under direct sunlight.
• 🔥 If you use the verbank while charging (at the same time distribute current and take the).
• 📦 If the body is closed in a cover or tightly packed.
• ⚡ If an uncertified high-current charger is used.

How to check and eliminate overheating:

1. Turn off the overbank from charging and let it cool for 30 to 60 minutes.
2. Check the temperature of the body with your hand – it should be warm, but not hot.
3. Try charging the device in a cool room (not on the battery or near the heater).
4. If the superbank warms up even without a load, this is a sign of a malfunction of the battery or controller.

If your overbank is overheating regularly, check:

• 🔌 Charger current – Xiaomi models are optimal for 2A (5V). Quick charging (Quick Charge) can cause overheating.
• 🔋 Battery condition – worn-out batteries warm more.
• 📦 Operating conditions – do not use the device in hot climates or in direct sunlight.

Mechanical damage: falls, impacts, water

Xiaomi’s superbanks don’t have official water protection (except for some models labeled with water protection). IPX4), So moisture almost always causes a malfunction, and even if the device doesn't fall into the water, condensation or high humidity can cause the contacts to corrosion.

Signs of mechanical damage:

• 💧 Oxidation traces on connectors or board.
• 🔧 Cracks on the body or impact marks.
• 🔌 staggering USB-connector (spread contacts).
• 🔋 Bloated battery (dangerous!).

If the overbank falls under the warranty (usually 12 months), do not disassemble it yourself - contact the authorized Xiaomi service center.

☑️ Repairs after mechanical damage

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If the power bank turns on after the fall, but does not charge, the contacts between the battery and the control board are most likely gone, in which case a careful soldering or a plume replacement will help.

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To dry the overbank after water is injected, DO NOT use a hair dryer or microwave! High temperatures will damage the battery. It is best to leave the device in a dry warm place for 2-3 days.

7. Charger compatibility: what can be used

Not all chargers are suitable for Xiaomi's superbanks, such as power supplies from older smartphones (5V/1A) They may not provide enough current, but too powerful adapters (Quick Charge) 4+) — Below is a compatibility table for popular models:

If your model is not listed in the table, focus on the marking on the case (usually indicated next to the USB-For example, an inscription INPUT: 5V≈2A means that the device supports charging up to 2A.

Important: Some Xiaomi Verbanks (e.g. Mi Power Bank 3) have dual-entry (Micro-USB) + If one connector is not working, try charging through another.

8.When to contact the service: signs of serious breakdowns

If you have tried all the methods, but the overbank is still not charging, most likely, the problem requires professional intervention.

• 🔧 Control board damaged (visibly burned elements or burn marks).
• 🔋 The battery is swelling or deformed.
• 🔌 USB-The charge is removed from the charge (required rationing).
• 📉 The Poverbank discharges in a few minutes even without loading.
• ⚡ The device sparks or makes extraneous sounds when connected to the network.

The cost of repairs in the service center Xiaomi depends on the model and type of breakdown:

• 🔄 Replacement USB-connector: 500-1500 ₽.
• 🔋 Battery replacement: 1000–3000 ₽ (depending on capacity).
• 📱 Control Board Repairs: 1500–4000 ₽.
• 🔥 Removal of the consequences of water intrusion: 2000–5000 ₽.

If your bank is under warranty, do not disassemble it yourself - this will cancel the warranty obligations. mi.com/ru/service.

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Before visiting the service, take a photo of the serial number of the Poverbank (usually on a sticker under the case) and the purchase check - this will speed up the process of warranty repair.

FAQ: Frequent questions about charging Xiaomi Power Bank