Why Xiaomi smartphone has become a long charge – a full analysis of the causes and solutions

Have you noticed that your Xiaomi charges much longer than before? 1-1.5 Full charge hours are now required 3-4 This problem is familiar to many owners of smartphones of the brand - from the budget Redmi to the flagship Mi and the most expensive. POCO. Slow charging is not only annoying, but also signals about possible malfunctions that may worsen over time.

In this article, we’ll look at all the possible reasons Xiaomi has been charging for a long time, from the banal wear of the cable to hidden software failures. You’ll learn how to diagnose the problem yourself, which settings to check first, and in which cases you can not do without a visit to the service center. And we’ll give step-by-step instructions to restore normal charging speed for different models, from Redmi Note 10 to Xiaomi 13 Ultra.

Spoiler: 70 percent of the time, you can fix a problem without repair, but first you have to pinpoint the source.

1. Battery wear is the main cause of slow charging

A smartphone battery is a consumable, and even when used carefully, its capacity is gradually reduced and charging time is increased. 300-500 Full cycles of charging the battery loses to 20% It's in its original capacity. For most users, it's in the 2-3 year-end.

How do you know if the problem is in the battery?

• 🔋 The smartphone is discharged faster than before (for example, with the 100% before 0% post 6-8 clock instead of usual 12-15).
• ⚡ Charging is jerky: it quickly gains interest, then “freezes” on one value.
• 🌡️ The phone gets hot during charging (over 40).°C).
• 📉 In battery settings (Settings) → Battery condition) shows capacity less than 80% of the original.

If you know any of these signs, you are likely to 90% It's the battery's fault, and it's especially true for older models. 2 years: Redmi 9/9A/9C, POCO X3, Mi 10/10T others.

⚠️ Note: If the battery capacity has fallen below 70%, It needs to be replaced soon, and further use can cause the phone to suddenly shut down even if it's not working. 30-40% battery-charge.

How to check the status of the battery on Xiaomi:

1. Open the Settings. → Battery status (on some models path: Settings) → Battery and productivity → Battery status).
2. Look for "Capacity" or "Wear." If it's below 80%, the battery needs to be replaced.
3. For more detailed diagnosis, use the AccuBattery app (available on Google Play).

2.Problems with charger and cable

Users often blame the smartphone, even though the problem lies in the charger or cable, and up to 30 percent of complaints about slow charging are solved by simply replacing the cable or power supply, according to service centers.

How to check if the charger is to blame:

• 🔌 Try charging your phone with another cable and power supply (preferably original from Xiaomi).
• ⚡ Look at the power supply. You need a quick charge: Redmi Note. 10/11, POCO X3/X4 — minimum 18W (5V/3A or 9V/2A). Xiaomi 12/13, POCO F4/F5 — minimum 33W (11V/3A). Xiaomi 13 Pro/Ultra — 67W or 120W (specialty-block).
• 🔍 Examine the cable for damage: bending, bare wires, traces of melting.
• 📱 Connect the charger to another device, and if it's charging slowly, the problem is charging.

Pay attention to the type of cable. You need a support cable for fast charging. USB-C Power Delivery or Quick Charge – Cheap cables from Chinese stores often fail to meet the stated specifications.

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If you have Xiaomi with fast charging support (33W and above), but the phone charges slowly even with the original unit, try to turn on the manual fast charging mode: → Battery and productivity → Fast charging (some models may call this item Turbo Charging).

3. Connector contamination USB-C — latent cause of slow charging

Dust, pile from pockets, small garbage - all this accumulates in the connector. USB-C This makes it difficult to get in touch, and it either charges slowly or it doesn't recognize the charger at all, which is particularly true for smartphones, which are often carried in pockets or bags without a cover.

How to clean the connector USB-C:

1. Turn off the phone.
2. Take a toothpick or plastic spatula (not metal!).
3. Carefully remove debris from the connector, moving along the contacts.
4. To remove dust, use a can of compressed air (you can buy in electronics stores).
5. Do not use alcohol or liquids – they can oxidize contacts!

If the problem remains after cleaning, check the connector for mechanical damage:

• 🔍 Check the connector in good light. Contacts should be smooth, without any corrosion.
• 📱 Try to shake the cable slightly in the connector while charging. If the current appears / disappears, the contacts are damaged.

⚠️ Note: If the contacts are in the connector USB-C bent or oxidized, do not try to clean them yourself - this can lead to short circuit.

Try another cable.|Check the garbage connector.|Clean the connector with a toothpick|Check contacts for damage|Try to use the other sleeves (if any)|Connect your phone to your PC to check data transfer-->

4. Software glitches and settings that slow charging

Sometimes slow charging is not due to hardware, but to software limitations. Xiaomi builds features into its smartphones that artificially slow charging to extend battery life, and background processes or firmware failures can also be to blame.

What settings to check:

• 🔋 Optimized charging (Settings) → Battery and productivity → Optimized charging.If the feature is enabled, the phone will charge more slowly after 80-90%. Turn it off for the test.
• 📱 Energy saving mode (Settings) → Battery and productivity → Power saving mode: This mode limits not only performance but also charging speed.
• 🔄 Background processes: Close all applications before charging (especially games, navigators, instant messengers).
• 🔄 Reset the battery settings. Go to Settings → System system → Resetting settings → Resetting battery settings.This will delete usage statistics and can eliminate software freezes.

If you've had a problem after checking your settings, it's probably the firmware that's to blame.

1. Go to Settings → About the phone → System update.
2. If an update is available, install it.
3. After the update, reboot.

If you have Xiaomi after the update MIUI And as it starts charging more slowly, try to roll back to the previous firmware. POCO X4 I have been complaining about this problem after updating to MIUI 14.

5.Overheating phone - why it slows charging

Xiaomi (like other manufacturers) automatically reduces the charging speed if the battery temperature exceeds the temperature of the battery. 40-45°C. This is done for safety, but often causes the phone to charge in the 2-3 longer.

Causes of overheating:

• 🌡️ Charging under direct sunlight or in a stuffy room.
• 🎮 Games or resource-intensive tasks during charging.
• 🔋 Faulty battery or charger.
• 📱 A closed case that does not allow heat to dissipate.

How to avoid overheating:

• 🛌 Charge your phone in a cool place (optimally) 20-25°C).
• ❄️ Remove the case while charging.
• 🚫 Do not use your phone for games or videos while charging.
• 🔄 If the phone is already overheated, disconnect it from charging and let it cool down. 10-15 minute.

To check the temperature of the battery:

1. Install the AIDA64 or CPU Monitor app.
2. Start charging and watch the temperature in real time.
3. If the temperature is above 45°C, charging will go at a reduced speed.

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If your Xiaomi is over 50 times hotter°C during charging, this may indicate a malfunction of the battery or power controller.

6. Failures of the power controller or motherboard

If all previous methods failed, the problem could be hardware, such as a power controller malfunction or a motherboard damage, the most serious breakdowns that require professional repair.

Signs of failure of the power controller:

• 🔌 The phone does not charge at all or only charges at a certain position of the cable.
• ⚡ Charging is jerky: it is fast, then slowly, then stops.
• 📱 The phone is turned off when charging is connected.
• 💥 There is a smell of smoke or smoke from the connector USB-C.

What to do in this case:

1. Do not attempt to repair the phone yourself – this can short circuit or break other components.
2. Contact the official Xiaomi service center or a verified repair center.
3. If the phone is warranty, do not open it - this will void the warranty.

The cost of repairing the power controller in Xiaomi depends on the model:

• Redmi 9/9A/Note 10 — from 1500 before 3000 ruble.
• POCO X3/X4 — from 2500 before 4000 ruble.
• Xiaomi 12/13 — from 4000 before 7000 ruble.

⚠️ Warning: If after falling or getting moisture, the phone began to charge slowly, immediately disconnect it from the power supply and take it to the service!

7. Effect of wireless charging on speed

If you use wireless charging, be prepared for the fact that it will always be slower than wired charging. even on models that support Qi Fast Charge (for example, Xiaomi). 13/13 Pro) speed rarely exceeds 10-15W, While wired charging can give 33W, 67W or 120W.

Comparison of charging speeds:

If you notice that wireless charging is even slower than usual, check:

• 🔌 Position of the phone on the charging station - it should lie strictly in the center.
• 📱 Cover – thick or metal covers can block charging.
• 🔋 Power supply – wireless charging requires a power supply unit with a power output of at least 10W (optimally 18W).

8. When is the time to bring the phone to the service?

If you’ve tried all the methods in this article, but Xiaomi is still charging too long, it’s likely that the problem requires professional intervention.

• 🔋 The battery is swelling (the phone body is deformed).
• ⚡ The phone is charged only in a certain position of the cable.
• 💥 There is a smell of smoke or smoke when charging.
• 📱 The phone is turned off when charging is connected.
• 🔌 Charging is jerky or stops after a few minutes.
• 🛠️ You've fallen on your phone or been in the water.

Where to repair:

• 🏢 Xiaomi’s official service centers – guarantee quality repairs and original parts, but can be more expensive.
• 🔧 Proven repair shops are cheaper, but make sure they use quality batteries (e.g., from the scalables to the scalables). ATL or SDI).

The cost of replacing the battery in the official service:

• Redmi 9/9A/Note 10 — 1500-2500 ruble.
• POCO X3/X4 — 2000-3500 ruble.
• Xiaomi 12/13 — 3000-5000 ruble.

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Never settle for a cheap, unoriginal battery replacement! These batteries can swell, overheat, or even ignite. The original Xiaomi battery should be labeled ATL or SDI and hologram manufacturer.

FAQ: Frequent questions about Xiaomi's slow charging