Xiaomi phone is charging for a long time: 10 reasons and proven ways to speed up charging

Did you plug a Xiaomi Redmi Note 12 or POCO X5 into charging, but after an hour the battery barely reached 30%? Or did the smartphone stop charging at all faster than 5% per hour? Slow charging is one of the most common problems for owners of Xiaomi phones, and it can occur on both new and old models. In this article, we will examine all possible causes, from banal wear of the cable to hidden system settings that slow down the process.

It’s important to understand that if the phone used to charge in 1.5 hours and now requires 4+ hours, this is not the norm. Even Xiaomi’s budget models support fast charging technologies (from 18W to 210W in flagships), and their performance decline always has a specific reason. We will not advise “just buy a new battery” – first check everything that can be fixed yourself.

So let's start with a diagnosis: how do you know what's stopping charging? You don't need any tools to do that, you just need to watch the behavior of the phone very closely, for example, if the charging light flashes or the phone is heating up more than usual, that's a hint. And now we go to the detailed analysis.

1. Check of charger and cable: 3 tests

In 60 percent of cases, slow charging is due to a faulty charger or cable, and the problem may not be obvious: the cable is intact, but the veins are broken inside, and the power supply gives off a voltage below the declared voltage.

• 🔌 Test 1: Try another charger. Take the original power supply from another device (e.g., from Redmi 10 or a new one). POCO F3) If the charging speed has increased, the problem is your RAM.
• 🔍 Test 2: Look at the cable. Bend it at the base of the connector. USB-C Or Micro-USB -- if you have an antenna effect, the phone starts charging/switching off, you need to replace the cable, especially for low-cost 2-length cables.+ square.
• ⚡ Test 3: Check the power. Install the AccuBattery app (available on Google Play) and see the actual charging power. 5W when connected to 18W-Block – the CPU or cable is faulty.

Notice the phone's connector, which often gets dust or debris, making the contacts in bad contact with the cable, and carefully clean the connector with a toothpick (not a metal object!) or compressed air, and if the contacts are oxidized (dark), they can be gently wiped with alcohol.

⚠️ Warning: Never use chargers with higher power than your Xiaomi supports. 33W, And you plug in. 120W-charging, this can lead to overheating and shorten the battery life. Maximum power for your model can be found on the official Xiaomi website or in the characteristics on the box.

2. phone settings that slow charging

Xiaomi is adding battery-care features to its smartphones that sometimes work against the user, such as the Redmi and POCO models that can default to Optimized Charging, which limits current to 80% to extend battery life.

1. Turn off optimized charging: Go to Settings → Battery → Battery settings → Optimized charging and deactivate option. In some firmware, this item may be called Battery Protection or Adaptive Charging.
2. Check the performance mode: In Settings → Special features → Performance mode, select High performance. In some models (for example, Xiaomi 13), this item is hidden - then use the search by settings.
3. Reset the battery settings: Sometimes the system will miscalibrate the charge level. To reset the data, go to Settings → Applications → Application Management → Three dots (menu) → Reset the application settings. This will not delete your data, but will return the battery settings to factory settings.

If you use wireless charging, make sure the phone lies flat on the charging station.Even a slight shift can reduce power from 10W to 5W. Also check if the back cover is overheating - if so, remove the case (especially thick or metal).

3. Software failures: viruses, cache and updates

Slow charging can be a symptom of a software failure, especially if the problem has occurred after updating the firmware or installing a new application.

• 🦠 Check your phone for viruses. Some malware in the background consumes resources, which restricts the system's charging. Use Google Play Protect or Malwarebytes.
• 🗑️ Clear the system cache. Go to Settings. → Warehouse → Cache data and click Clear.This won't delete your files, but can eliminate freezes that interfere with normal charging.
• 🔄 Update the firmware. In some versions MIUI There were power management bugs. Go to Settings. → The phone. → Update the system and install the latest version.
• 🛠️ Reset the settings to factory. The last method, if nothing worked. Pre-backup the data in Settings. → Additionally. → Backup and reset.

If the phone started to charge slowly after installing a particular app (like Facebook or a game), try to remove it.Some programs aggressively use background processes, which leads to overheating and limiting charging. Check the battery consumption list in Settings → Battery → Battery use.

⚠️ Note: After resetting the settings to the factory phone may be the first 2-3 It's normal for the system to calibrate the battery. If the problem persists longer, look for hardware reasons.

Battery: wear, bloating and calibration

The average battery life of Xiaomi smartphones is 2-3 years (or 500-800 charge cycles), after which the capacity drops, and the phone not only discharges faster, but also charges longer.

1. Find out how many charging cycles you have. Install the AccuBattery app and check the battery health setting. If it's below 80%, the battery is worn out and needs to be replaced. In new phones, it should be 95-100%.
2. Check for bloating. Put your phone on a flat surface and press the back lightly. If it flexes or there's a gap between the lid and the table, the battery is swollen. In that case, immediately stop using the phone and take it to the service center! A bloated battery can damage the screen or even ignite.
3. Calibrate the battery. Sometimes the battery controller misrepresents the charge level. To reset it, completely discharge the phone (before turning it off), then charge to 100% without interruption. Repeat the procedure 2-3 times.

If you’re considering replacing your battery, use only original parts from Xiaomi or certified counterparts (such as those from ZMI). Cheap batteries from Chinese stores often have lower capacity and can damage the power controller.

5.Overheating: Why the phone heats up and slows charging

Xiaomi is equipped with its smartphones with overheating protection, which automatically reduces the charging current if the temperature exceeds 40-45 ° C. This can happen for several reasons:

• 🌡️ Using your phone while charging. Playing, shooting videos, or video calls load the processor, which causes heat.
• ☀️ External conditions: Do not leave your phone in the sun, near the heating battery or in a closed car — 10-35°C.
• 🔥 Battery or board malfunction: If the phone warms even in a simple one, it may indicate a short circuit in the battery or damage to the power controller.

To lower the temperature, remove the case (especially silicone or with metal inserts), open the back cover (if it is removable) and let the phone cool down. 15-20 minutes before charging. Also avoid using fast charges (67W, 120W) In hot weather, it is better to switch to standard 18W-charging.

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If your phone is too hot and you need to charge it urgently, use airplane mode, which will turn off the communication modules (4G, Wi-Fi, Bluetooth), which consume a lot of power and generate heat.

6. Hardware malfunctions: what breaks most often

If all software methods have been tried and the phone still charges for 5+ hours, the problem is likely hardware.

• 🔌 The connector is damaged. USB-C. The contacts could oxidize, bend, or break away from the board, in which case the charging is interrupted or only in a certain position of the cable.
• 🔋 The power controller is out of order, and this chip controls charging and discharging the battery, and when it's damaged, the phone can charge very slowly, or it can't charge at all.
• 📱 Motherboard problems, for example, when you fall or get moisture, you might have damaged the power tracks.
• ⚡ Charging coil malfunction (for wireless charging) If the phone is not charging from a wireless station but is charging normally via cable, the problem is with the coil or its connection to the board.

It is not recommended to repair hardware faults yourself (except for cleaning the connector). Contact the authorized Xiaomi service center for diagnostics and replacement of damaged components with a guarantee.

• Replacement of the connector USB-C: 1 500–3 000 ₽
• Replacement of the power controller: 3000–6,000 ₽
• Motherboard repairs: 5,000–15,000 ₽ (model-wise)

⚠️ Warning: If the phone stops charging after falling, water hitting or disassembling itself, don't try to turn it on again.This can short circuit and cause permanent failure.

7. Features of models: why Redmi and POCO charge differently

The charging speed depends not only on the condition of the phone, but also on the model.

• The Xiaomi 13T Pro and Redmi K60 Ultra support 120W charging, but only with the original power supply.Third-party RAMs may not give full power.
• POCO X5 The Redmi Note 12 has a 33W Charging, but in budget configurations is 22.5W-If you use native RAM out of the box, the phone will charge slower than it can.
• The Xiaomi Civi 3 and other slim models often suffer from overheating due to their compact body, and can be protected even under low load.

Before you buy a new charger, check what maximum power your model supports. For example, for Redmi 10 it is pointless to buy. 67W-Block – the phone will not charge faster 18W. A full list of supported capacities can be found on the Mi.com website in the device specifications.

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Even if your Xiaomi supports fast charging, it will only work if you meet three conditions: original (or certified) RAM, serviceable cable and battery temperature below 40°C.

8. Alternative charging methods: what to do if nothing helps

If standard methods have not yielded results, and you can not contact the service, try these temporary solutions:

• 🔄 Charging when it's off. Sometimes the phone only charges normally when it's off. This indicates a software failure in Android.
• 🔌 Some external batteries (e.g. Xiaomi Power Bank 3) provide a more stable current than network RAM.
• 🚗 Charging from a car adapter. If the phone charges faster in the car than from an outlet, the problem may be in the home power grid (low voltage).
• ☀️ Solar panels, suitable for hiking or traveling without access to the grid, but keep in mind that these devices usually do not exceed the power of the system. 10W.

If you often encounter slow charging, consider buying a portable charger with Quick Charge or Power Delivery support.For example, Baseus 65W GaN or Anker PowerPort III provide stable current and are compatible with most Xiaomi models.

Remember, if the phone is charging slowly because of battery wear, no alternative method will return the previous speed, in which case the only solution is to replace the battery.

FAQ: Frequent questions about Xiaomi charging