Xiaomi phone is slowly charging: what to do and how to speed up charging

You plugged Xiaomi into charging, but the battery percentage crawls like a turtle, and an hour later the screen still reads "Charge...12 percent"? The problem of slow charging is familiar to many owners of smartphones of this brand - from the budget Redmi to the flagship Mi 13 Ultra. In 80% of cases, it is not the breakdowns that are to blame, but the wrong settings, worn accessories or background processes that "steal" current.

In this article, we will discuss all possible causes, from the banal contamination of the connector to the hidden errors of the MIUI firmware. You will learn how to diagnose a problem in 2 minutes, what settings to optimize, and when it really is time to carry the phone to the service. And also share a unique life hack using an engineering menu that speeds up charging by 30% (works on models with a Snapdragon 8 Gen 2 processor and later).

1. Checking of charger and cable

The first thing to rule out is faulty accessories. Even the original Xiaomi cable can lose up to 40% of its bandwidth after a year of use due to microcracks in overflight or contact oxidation, and cheap “nouneim” charges often only give out half of the declared power.

How to check:

🔌 Connect your phone to another power supply (preferably original with Quick Charge support) 3.0/4.0). If the charging speed has increased - the problem is charging.
🔗 Try another cable (better with labeling) USB-C to USB-C Curve it at the base — if there are artifacts on the screen (flickering, reports of unstable connection), it is time to change the cable.
📊 Install the Ampere app (available on Google Play) and it will show the actual charging current: ⚡ Normal: 1.5-2.5 A (for fast charging) ⚠️ Problem: 0.3-0.8 A (phone charges in "economical" mode)

📊 What Charging You Use for Xiaomi?

Original from Xiaomi

Charging from another brand (Samsung, Apple, etc.)

No-name charging

Wireless charging

Pay attention to the power supply. For modern Xiaomi (for example, Redmi Note 12 Pro+) the minimum recommended power is 33 W. If you use charging on 5V/1A (as for old “button” phones), charging time will increase 3-4 times.

⚠️ Note: Some “smart” sockets and extension cords with USB-The ports limit the current to 0.5A, even if you have a powerful adapter on.

2.Diagnostics of USB-C connector and contacts

The USB-C connector in Xiaomi is one of the most vulnerable places. Dust, moisture, frequent connections/disconnections of the cable lead to oxidation of contacts or mechanical damage. If the phone charges only in a certain position of the cable or with interruptions, it is the connector that is to blame.

How to clean the connector yourself:

☑️ Cleaning the connector USB-C

Turn off the phone and remove it. SIM-mapTake a toothpick or plastic spatula (not metal!)Carefully remove visible dirt and dustWipe the contacts with an alcohol napkin (70% isopropyl alcohol)Let the connector dry for 10-15 minutes

Done: 0 / 5

To check contacts:

Connect the phone to the computer, and if it's detected by multiple attempts, the contacts are damaged.
Light a flashlight into the connector: oxidized contacts will have a green or white coating.
Try to sway the cable slightly in the connector while charging. If the current jumps (see Ampere) - repair is required.

What to do if the contact breaks down in the connector?

If a piece of contact or debris is stuck inside the connector, DO NOT try to remove it yourself, this may be a charge-free service. Contact a service that uses a microscope and specialized tools. The average cost of repairing the connector in Russia is 1,200-2,500. ₽.

On Xiaomi models with moisture protection (for example, Xiaomi 13T Pro), the connector can corrodate after getting liquid, even if the phone “survived”, in which case only replacing the connector will help.

3. Optimization of battery settings in MIUI

MIUI has several hidden features that can artificially limit charging speeds, such as Smart Charging (renewed as Adaptive Charging) mode slows the process after 80% to extend battery life, and Background Limiting can block charging when the phone is actively used.

How to disable restrictions:

Go to Settings → Battery and Performance → Battery Settings
Turn off the options: 🔋 Adaptive charging (or Smart charging) 🚫 Limitation of high temperature charging ⚡ Slow exercise at night (if any)

Performance mode

"High productivity"

Some models (POCO F5, Redmi K60) have a hidden engineering menu where you can turn on the "Fast Charging" mode forcefully.

Enter the phone code in the app: ##4636##


Go to "Battery Information" → "Charging"




Select "AC" (if connected to an outlet) or "USB" (if connected to a PC)




Check the "Fast Charging" box.

💡

If the phone still stops charging after 80% after turning off Adaptive Charging, try resetting the battery settings: Settings → Applications → Application Management → Three dots (menu) → Reset application settings.

4. Battery problems: how to determine wear

Xiaomi's lithium polymer batteries lose capacity after 300 to 500 charge cycles. If your phone is older than 2 years, the battery is 70 percent likely to wear out.

⚡ The charge is jerky (fast, then slow).
🔥 The phone is very hot even at 5% charge.
📉 Battery goes down in 2-3 hours without loading.
🛑 Charging stops at 80-90% and does not go further.

How to check the status of the battery:

Install the AccuBattery app (showing real capacity and wear).
Go to Settings → About Phone → Battery status (on some models).
In the Engineering Menu (#4636##) see the Health Level parameter»: 🟢 90-100% battery normal. 🟡 70-89% – Replacement is required soon. 🔴 Less than 70% – battery is dangerous (risk of bloating!).

Xiaomi model	Average battery life	Cost of replacement (₽)
Redmi Note 11/12	2.25 years	1 500–2 200
POCO X4/X5	2 years	1 800–2 500
Xiaomi 12/13	2.5–3 years	2 500–3 500
Black Shark 5	1.5-2 years	3 000–4 000

⚠️ Warning: If the battery is swelling (the phone body is "unplugged"), immediately disconnect it from charging and do not use!

5. Effects of Background Processes and Applications

Many users are unaware that active apps can steal charging current. For example, if you play Genshin Impact while connecting to the network or stream video in 4K, the phone may even run out despite charging!

How to reduce the load:

🎮 Close all games and heavy apps (e.g. Google Maps in navigation mode).
📶 Turn it off. 5G/LTE, If the signal is weak (constant search for the network eats up to the 20% current).
🔄 Turn on the mode of the aircraft for the time of charging (accelerate the process by 15-20%).
❄️ Turn off Autosynchronization (Settings) → Accounts and synchronization).

Check which apps consume the most energy:

Open Settings → Battery and Performance → Battery Use
Look at the chart over the last 24 hours, and if an app eats up >10%, delete or limit its activity.

💡

On models with MIUI 14+, there is a hidden function called Super Charging, which temporarily turns off background processes. To activate it, hold the power button for 5 seconds while charging (it does not work on all devices).

6.Firmware problems and resetting settings

Sometimes slow charging is associated with firmware errors, especially after the MIUI update. For example, MIUI 13.0.4-13.0.6 had a bug that limited the phone to 0.5A regardless of the charger, which is solved by resetting to factory settings or flashing.

How to reset your settings without losing data:

Make a backup (Settings → About Phone → Backup).
Go to Settings → Additional → Resetting settings.
Select Reset Network Settings (this will delete stored Wi-Fi and Bluetooth, but will not affect files).
If it does not help, do “Reset all settings” (remove the application, but save photos and videos).

If the reset didn’t work, try retracing to the previous version of MIUI:

Download stable firmware for your model from en.miui.com.
Go to Settings → About Phone → System Update → Three Dots (menu) → Select a firmware file.
Select the downloaded file and wait for the process to be completed (the phone will reboot several times).

What if the phone doesn’t charge after the upgrade?

This is a critical firmware error. Try going to Recovery Mode (keep Power + Volume up when the phone is off) and do Wipe Cache Partition. If it doesn't work, run your phone through the Mi Flash Tool in EDL mode (PC required).

Temperature and external factors

Xiaomi automatically reduces the charging speed if the battery temperature goes beyond 10–40°C. The problem can be not only in the heat, but also in the cold! For example, if you charge your phone in the cold (-5°C), the current will drop to 0.1A.

Optimal conditions for charging:

🌡️ Air temperature: 18-25°C.
🚫 Do not put the phone on soft surfaces (cushion, blanket) - this blocks the heat sink.
☀️ Avoid direct sunlight (such as charging on a windowsill in summer).
🔥 If the phone is heated above 45°C, disconnect it from the network and let it cool for 15-20 minutes.

How to check the temperature:

Install the AIDA64 app (showing the battery and processor temperature).
Or enter the section "Battery Information" in the engineering menu (#4636##).

On models with liquid cooling (Black Shark, POCO F4 GT) you can turn on the turbo cooling mode:

Settings → Special features → Performance mode → Turbo cooling

8. Hardware breakdowns: when to contact the service

If you’ve tried all the ways, but the phone still charges slowly, the problem may be in the hardware:

🔌 Faulty charging controller (on the motherboard) Symptoms: the phone doesn't detect charging or only charges from a specific cable.
🔋 Damaged battery plume, common after falling or disassembling the phone.
⚡ Burned protection diode (the phone is charged only when switched off).
🛠️ Problems with the motherboard (for example, after getting liquid).

Average prices for repairs in Russia (2026):

Type of breakdown	Cost (₽)	Duration of repairs
Replacement of USB-C connector	1 200–2 500	1-2 hours
Replacement of the charging controller	2 500–4 000	1-3 days
Repair of battery plume	1 800–3 000	2-4 hours
Diagnostics of the fee (after water)	500–1 500	1 day

⚠️ Warning: If the phone stopped charging after falling or getting moisture, don't plug it into charging until diagnosis! this can cause short circuit and damage the board.

Where to repair:

🏬 Xiaomi official service centers (work guarantee, but more expensive).
🔧 Unofficial workshops (cheaper, but risk of poor repairs).
🛒 Self-sufficient (only if you have experience of rationing) SMD-component!).

💡

Before visiting the service, make a backup of the data - when repairing the board or replacing the plume, a complete phone reset may be required.

FAQ: Frequent questions about Xiaomi's slow charging

❓ Why Xiaomi only charges slowly at night?

MIUI has a function called “Slow Charging at Night,” which automatically limits current from 23:00 to 7:00 to extend battery life. Disables in Settings → Battery → Battery settings.

❓ Can I use a charger from another phone (e.g. Samsung)?

You can, but charging speeds can slow down. Xiaomi is optimized for Quick Charge 3.0/4.0 protocols, and Samsung charging often uses Adaptive Fast Charging. For maximum speed, use original accessories or certified (Anker, Baseus).

❓ Why does your phone charge up to 80% and then slow down?

This is normal behavior for lithium polymer batteries. After 80%, the charging controller automatically reduces the current to reduce heating and extend the battery life. If you want to charge up to 100% faster, turn off Adaptive Charging in the settings.

❓ Does the case affect the charging speed?

Yes, if the case is blocking the heat sink, for example, thick silicone or metal cases can raise the temperature of the phone by 5-10 ° C, which triggers protection and reduces the current.

❓ Can you speed up the charge by turning off the phone?

Yes, when it's off, it charges 20 to 30 percent faster because it doesn't use energy to run the system, but on models with MIUI 14+, there's a "Fast Charge Off" feature that automatically turns on when you connect to the network.