Why Xiaomi Phone Takes a Long Time to Charge – All Reasons and How to Speed Up the Process

Your Xiaomi, Redmi or POCO started charging 2-3 times longer than usual? Battery gains only 10-20% per hour, although earlier during this time it managed to recover by half? The problem of slow charging is one of the most common among smartphone owners of the brand, and the reasons for it can be more than a dozen. In this article, we will analyze all possible factors, from banal wear of the cable to hidden settings of the system that slow down the process.

It's important to understand that if you used to charge your phone in 1.5 hours and now it takes 4-5 hours, it's not just an "inconvenience" but a malfunction signal. Ignoring the problem can lead to complete battery degradation or even damage to the power controller. But don't rush to bring the device to service: in 80% of cases, slow charging can be eliminated by yourself. Next, a detailed analysis with instructions, tests and tables.

1. Battery wear is the main cause of slow charging

The average lifespan of lithium-ion batteries in Xiaomi smartphones is 2-3 years (or 500-800 full charge cycles), after which the battery capacity decreases by 30-50%, and the charging speed drops by 2-4 times.

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Go to the Battery Information tab.
4. Check the wear level (if it is above 30%, it is time to change the battery).

On Xiaomi 12/13/14 and Redmi Note 11/12, there is another way: go to Settings → Battery → Battery Status. If it says “Good” but the phone still charges slowly, the battery is not the problem. If the status is “Replace” or “Critical”, further diagnosis is meaningless: a replacement is required.

⚠️ Note: If the battery wear level is higher than 40%, And the phone continues to be in use with the original charger, which can cause the battery to bloat and damage to the motherboard. POCO F3/F4 redmi K50 This risk is especially high due to the dense layout of the body.

2.Problems with charger and cable

Even if you use a Xiaomi power supply, it doesn't guarantee that it's working properly, and statistics show that 35 percent of slow charging cases are caused by a faulty charger or cable.

• 🔌 Check the power supply: Connect it to another phone. If that phone is also charging slowly, the unit is faulty.
• 📱 Cable test: Try charging your phone with another cable (preferably original). If the speed has increased, the cable is a problem.
• ⚡ Block power: Make sure the power supply supports Quick Charge 3.0/4.0 (Xiaomi models are older 2019 For example, the Redmi Note 10 Pro requires a minimum 33 Watt.

Pay special attention USB-If you connect the cable to a message that says, "Charge suspended" or "Slow charging," it's likely that the connector has got dust or dirt, clean it with a wooden toothpick (not a metal object!). POCO X3/X4 Ports are often clogged due to lack of safety nets.

If your phone charges more than 50% longer than the time indicated in the table, this is a reason for diagnosis. For example, Redmi Note 11 with a serviceable battery and original 33 W RAM should gain 100% in 1 hour 5 minutes. If the process stretches by 3+ hours, look for the reason in one of the following sections.

3. Software failures and system settings

The MIUI operating system (or HyperOS on new models) can artificially limit charging speeds due to:

• 🔄 Background: Apps like Facebook, Telegram or TikTok consume up to 30% of energy during charging, slowing it down.
• 🛠️ Battery Optimizations: Adaptive Charging feature enabled (Settings) → Battery → Battery settings limit current to 80% to save battery life.
• 📱 Developer Mode: If you have previously enabled debugging USB, Some parameters may have been lost (e.g., Background Limitation for system processes).

To eliminate programmatic limitations:

Disable adaptive charging in Settings → Battery

Close all background applications (swipe up in the multitasking menu)

Turn off the power saving mode (battery icon in the notification curtain)

Reboot your phone (hold the power button for 10 seconds)

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Xiaomi HyperOS models (such as the Xiaomi 14 or Redmi K70) have added a new option, “Intelligent Charging Control,” which automatically slows down if the phone is used while connecting to the network.

1. Go to Settings → Battery → More
2. Find the item “Intelligent Charging Control” and deactivate it.
3. Reset the device.

⚠️ Attention: On some firmware MIUI (particularly POCO M3/M4) When adaptive charging is turned off, the error "Charging is suspended due to overheating" may occur, because the system defaults to calculating the thermal balance with the constraints. If the error occurs, return the settings back and check the phone for overheating (see section below). 5).

4.Overheating phone is the hidden enemy of fast charging

Lithium-ion batteries cannot be physically charged quickly at temperatures above 40°C. Xiaomi's system automatically reduces current if sensors detect overheating.

• 🌡️ Use while charging: Games, video, or navigation load the processor, resulting in heat.
• ☀️ External conditions: Charging under direct sunlight or in a stuffy room.
• 🔥 Power controller malfunction: If the phone is warming even in standby mode, it may indicate chip damage (a common problem with Redmi) 9/9A fall-out).

You can check the temperature through the AIDA64 application (Sensors section) or the built-in menu:

1. Enter the code in the phone app: ##4636##.
2. Select "Battery Information".
3. Look at the temperature. Normal: 25-35°C. If it's above 40°C, charging will be suspended.

Critical information: On Xiaomi models with Snapdragon 8 Gen 1/2 processors (e.g. Xiaomi 12 Pro, POCO F4 GT), overheating when charging can lead to irreversible battery damage due to high pack density. If the temperature exceeds 45°C, immediately disconnect the phone from the network and let it cool for 30 minutes.

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If the phone warms even without a load, remove the case while charging - this will reduce the temperature by 5-10 ° C.

5. Damage to the power controller or USB connector

If all previous steps did not help, the problem may lie in the hardware:

• 🔌 Oxidation of contacts USB: Try to clean the connector with alcohol (at least) carefully. 90%) And a toothpick. 8/9 Often oxidized contacts due to moisture.
• 🔧 Power Controller Damage: If the phone doesn’t detect the original RAM or shows “Slow Charging” even with a serviceable cable, it’s a sign of chip failure BQ25896 (Most of the Xiaomi models).
• 📱 Motherboard defect: After falls or bumps, the power tracks may move away.

Checking hardware serviceability can be as follows:

1. Connect your phone to your PC via USB. If it's defined as "Unknown Device," the problem is with the controller.
2. Try charging your phone from another source (e.g. power bank) and if the speed hasn't changed, it's the connector or the board.
3. Look at the charging indicator: if it flashes or burns unstablely, it is a sign of a short circuit in the power chain.

⚠️ Attention: On models POCO X3 NFC And Redmi Note 10 has a common problem with the tipping of the USB-Type C connector contacts after 1.5-2 years of use. If you sway the cable charging appears, then disappears - you need to replace the connector (repair cost: 1,500-2,500) ₽).

6. Impact of firmware and MIUI/HyperOS updates

After the system update, many Xiaomi users are faced with the fact that the phone starts to charge more slowly.

• 📦 Firmware errors: For example, in MIUI 14.0.4 for Redmi Note 11 was a bug, which caused the power controller to work in “economical” mode.
• 🔄 Resetting: After the update, battery settings may be knocked down (for example, fast charging may be turned off).
• 🛡️ New restrictions: HyperOS added “Battery Longevity Mode” that is activated by default.

Decisions:

1. Check the firmware version in Settings → About Phone. If it’s a beta (like 23.12.15 beta) – roll back to stable.
2. Reset the battery settings: Settings → Battery → Reset settings.
3. If the problem appears after the update, try clearing the cache: 1. Turn off the phone. 2. Press Volume up + Power before the Mi. 3 logo appears. From the recovery menu, select Wipe Cache.

On Xiaomi 13T and newer models after upgrading to HyperOS, you may need to manually activate fast charging:

1. Go to Settings → Special Opportunities → More.
2. Turn on “Fast Charging” (if the item is missing – the firmware does not support the function).

External factors: from covers to network filters

Sometimes the reason for slow charging isn't the phone.

• 🔌 Network filter or extension: Many "cheap" extension cords can't withstand the load of fast charging (33-120 watts) and limit current.
• 📱 Cover or bumper: Tight covers (especially silicone) can cover the vents, overheat. Remove the case while charging.
• ⚡ Power supply: Charging from USB-PC or laptop port is always slower (max. 0.5-1 A.
• 🌐 Wireless charging: On Xiaomi models with Qi support (such as Xiaomi 13 Pro), wireless charging is always slower than wired charging (max. 50 W vs. 120 W).

It is also worth checking the voltage in the network. In some regions it can be below the standard 220 V, which leads to a drop in the power supply, you can check the voltage using a tester or the VoltageCheck app (available on Google Play).

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If the phone is only charging slowly in a particular outlet, the problem is not in it – look for the reason in wiring or network filters.

FAQ: Frequent questions about Xiaomi's slow charging