Xiaomi is Slowly Charging: All the Reasons and How to Speed Up Charging

You plugged in a Xiaomi Redmi Note 12 or POCO X5 Pro to charge, but the battery percentage crawls like a turtle, and the indicator shows "It's 4 hours to fully charge"? Slow charging is one of the most common problems of Xiaomi smartphones, and there can be a dozen reasons for it: from banal contamination of the connector to critical battery wear. In this article, we will analyze all possible reasons why Xiaomi is charging for a long time, and give step-by-step instructions for diagnosing and troubleshooting.

It's important to understand that if you used to charge in 1.5 hours and now it takes 4+ hours, that's not the norm. Even Xiaomi's budget models with Quick Charge 3.0 or HyperCharge support have to recover 50-70% in 30-40 minutes. If that doesn't happen, there's a problem somewhere. We'll start with simple solutions (checking the cable, cleaning the port), and then move on to complex ones (diagnostics the power controller, battery replacement).

1. Problems with charger or cable

To start with, 90 percent of slow charging is due to a faulty charger (ROM) or cable, and even if they look good, internal damage can limit current, for example, a broken wire inside a cable reduces power from 18W to 5W, and the phone charges 3-4 times longer.

How to check:

• 🔌 Use the original RAM. Charges from Xiaomi are marked as MDY-12-ES (18W), MDY-11-EP (33W) or MDY-13-EP (67W/120W). Counterfeiting often gives less power.
• 📱 Try another cable. The original one is the best. USB-C Xiaomi (thicker and more oversized) cheap cables 2-long+ Meter loses 40% of its power.
• 🔄 Connect the RAM to another device, and if it's charging slowly, it's a problem.

Pay special attention to wireless charging. Xiaomi 13 Pro or Mix Fold 3 models support Qi 2.0 (50W), but if you use a non-original station, the power will drop to 5-10W. Also check if the back of the phone overheats during wireless charging - this is a sign of incompatibility.

2.Contamination of the USB-C connector or contact oxidation

Connector. USB-C Dust, pile from your pocket, moisture or oxidation of contacts can interrupt the connection, and the phone will charge with jerks or refuse to take current at all. 9A, POCO M4 Pro).

How to clean the connector:

1. Turn off the phone and get it out. SIM-map.
2. Light the connector with a flashlight - if you see garbage inside, carefully remove it with a plastic toothpick (NOT metal!).
3. For oxidized contacts, use alcohol wipes (do not overdo it with liquid!).
4. Blow the connector with compressed air (a canister for cleaning equipment).

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If the cable is still poorly held after cleaning, try to bend the locking tongue slightly inside the port (with tweezers carefully), which often solves the drop-down cable problem.

⚠️ Warning: Never use cotton cotton, paper or sharp objects to clean, leaving fibers or scratching contacts. If the phone stops charging after cleaning, check if the contacts inside the connector are bent.

Battery wear: how to check and what to do

Lithium-polymer batteries in Xiaomi are designed for 500-800 charging cycles. After that, the capacity drops by 20-30%, and the charging time increases by 1.5-2 times. For example, if before Xiaomi 11T Pro was charged in 1 hour, then after 2 years it can require 2.5-3 hours.

How to check the wear:

1. Go to Settings → Battery → Battery status (on MIUI 14+) If it says "Good" - wear is minimal. If "Replacement is recommended" - capacity has dropped below 80%.
2. Install the AccuBattery (Play Market) app, which will show real capacity (for example, 3800 mAh instead of the declared 5000 mAh) and the number of cycles.
3. If the phone loses 10-15% per night in airplane mode, the battery degrades.

⚠️ Warning: If the battery is swelling (the phone body is "smoking"), immediately disconnect it from charging and do not use - it is dangerous.

4. Software failures: MIUI optimization and resetting

Sometimes slow charging is not due to hardware, but to software limitations in MIUI. For example, after updating the firmware, Adaptive charging (limits current to save the battery) or background processes “eat” energy faster than it comes in.

What to do:

• 🔧 Turn off adaptive charging: Settings → Battery → Battery settings → Adaptive charging (off).
• 🚫 Close the background apps. Some games (Genshin Impact, PUBG) Telegram with autoload media can consume up to 20% charge per hour.
• 🔄 Reset the battery settings: Settings → Battery → ⋮ (menu) → Resetting battery settings.
• 📱 Update the firmware. In some versions MIUI 13-14 was a charging current-limited bug (fixed in patches).

Disable adaptive charging |Close all background applications |Reset battery settings |Check MIUI Updates |Remove system cache-->

If nothing worked, try a factory reset (don’t forget to back up!) in 10% of cases, this solves the problem if it was caused by an application conflict or corrupt system files.

5.Overheating phone: why it slows charging

Xiaomi automatically reduces the charging current if the battery temperature exceeds 40-45 ° C. This is protection against battery degradation, but because of it, the phone can charge 2-3 times slower.

• 🔥 Using your phone while charging (games, video editing, Google Maps with navigation).
• ☀️ Charging under direct sunlight or in a stuffy room.
• 📱 Faulty power controller (heats even in a simple way).
• 🔌 Powerful RAM without thermal control support (for example, charging from a laptop on a computer) 65W).

How to avoid overheating:

1. Charge your phone in the shade and at room temperature (optimally 20-25°C).
2. Remove the case (especially silicone or bumper with metal inserts).
3. Do not use your phone for high-intensity tasks while charging.
4. If the case is hot, turn off the charging and let the phone cool for 10-15 minutes.

6. Failure of the power controller or USB port

If you’ve ruled out all the previous reasons, but Xiaomi is still charging slowly, the problem could be in the hardware:

• 🛠️ The power controller (the circuit on the motherboard that distributes current) is damaged, and the phone only charges when it's off or says, "Charge interrupted".
• 🔌 Connector contacts severed USB-C (often after a cable has fallen or been unwisely connected).
• 🔋 Short circuit in the power supply (the phone may suddenly turn off when connected to charging).

Diagnosis:

1. Connect your phone to your computer via USB, and if it's defined as "Unknown Device" or is constantly connected or disconnected, the problem is in the port.
2. Try charging your phone when it's off, and if it's charging normally, it's the controller's fault.
3. Look at the charging indicator: if it flashes or burns unstablely, it is a sign of a circuit malfunction.

⚠️ Warning: If the phone doesn't turn on at all after you're connected to charging or if it shows "0%" despite a long charge, it may be a symptom of a power failure on the board. Self-repair is not possible here - soldering equipment and experience are required.

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If the phone is charged only in the off state or through a wireless station - with a probability of 90% faulty power controller or USB-C connector. Repair will cost 1.5-3 thousand rubles (depending on the model).

External factors: network humidity, humidity, mechanical damage

Sometimes slow charging is not connected to the phone, but to external conditions:

• ⚡ Unstable voltage in the socket (especially relevant for older homes). Check with a multimeter - if the voltage is lower 200V or sliding, the CC will not be able to give full power.
• 💧 Moisture entering the connector or board, even after drying, oxidation can remain and interfere with normal charging.
• 📵 Use of low-quality power bank: Many portable batteries do not give out the declared power (for example, instead of using the power bank). 20W give 10W).
• 🔌 Connection through USB-Every intermediary in the circuit reduces the current.

If you suspect the problem is in the socket, try:

• Connect the ROO to another outlet (preferably with grounding).
• Use a network filter to stabilize the voltage.
• Check charging from another source (such as a laptop or car adapter).

FAQ: Frequent questions about Xiaomi's slow charging