How to enable fast charging on Xiaomi Redmi 10S: from MIUI settings to charger selection

Why the Redmi 10S doesn’t charge fast – and how to fix it

Did you buy a Xiaomi Redmi 10S with fast charging, but the smartphone is persistently charging for 3-4 hours? Or maybe you noticed that the percentage of the battery grows too slowly even with a branded charger? The problem is not the device itself, but the wrong settings or incompatible equipment.

Redmi 10S (codename rosemary) officially supports fast charging up to 33W, but by default MIUI often limits the speed to the standard 10W-18W. This is done to protect the battery from overheating and wear, but if necessary, the restriction can be removed. In this article, we will analyze all the ways – from turning on the mode in the settings to choosing the right charger and cable.

It is important to understand that even if you activate the top speed, the actual power will depend on:

• 🔌 Type of charger (original charger) 33W vs. cheap no-name)
• 📱 Temperatures of the smartphone (when overheating) MIUI automatically reduces current)
• 🔋 Battery status (a worn-out battery charges more slowly)
• 🔌 Cable (USB-C supportive USB Power Delivery is a must!)

Before you change your settings, check: Does your Redmi 10S really support 33W? Some regional versions (for example, for India) may have a reduced charge to 18W. You can check this in the specifications on the official Xiaomi website or through the CPU-Z application (Battery section).

Step 1: Check the complete set – what should be in the box

The first thing to do is make sure you're using the right charger. -- Xiaomi Redmi's baseline 10S adapter on 33W (model MDY-12-ED), In some regions (e.g. Europe) versions of the 18W-How do you tell the difference?

If it was in your box 18W-The charger, this does not mean that the smartphone does not support 33W! Xiaomi is a little bit more expensive to buy an original adapter. MDY-12-ED It costs about 1000-1500 rubles. Alternatively, certified chargers from Anker, Baseus or Ugreen with support USB Power Delivery.

Also pay attention to the cable: it should support current up to 3A. Conventional cables from a set of cheap powerbanks are often limited to 2A, which automatically reduces the charging speed. The best option is a Xiaomi cable labeled 3A or a certified USB-C to USB-C from the same Anker or Belkin.

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To check the actual charging power, install the AccuBattery (Android) or Ampere app, which will show the current and voltage in real time.

Step 2: Enabling fast charging in MIUI settings

Even with the right charger, the Redmi 10S can limit speed due to power saving settings. To remove the restrictions, follow these steps:

1. Open Settings → Battery and Performance.
2. Go to the Battery Settings section.
3. Find Fast Charging (or Charging Mode in newer versions of MIUI).
4. Activate the switch to Enable fast charging.
5. If there is an option Adaptive charging - turn it off (it artificially slows down the process to extend the battery life).

In some firmware (for example, MIUI 13 and above) the path may be different: Settings → Battery → Cog badge (⚙) → Fast charging.

If there is no fast charge at all, this could mean:

• 🔋 You are using an unoriginal charger (MIUI Hide the option if it does not recognize the Quick Charge protocol)
• 📱 You have an outdated version. MIUI (Update the firmware through Settings → The phone. → Updating the system)
• 🛠️ In the smartphone disabled the developer mode (turns on through 7 taps on the version) MIUI phone)

Uses original 33W adapter |Cable supports 3A (marked) |MIUI updated to latest version |Saving modes turned off-->

Step 3: Disconnecting Energy Saving Modes

MIUI aggressively optimizes power consumption, which can interfere with fast charging, and even if you turn on the option, the system can artificially limit current.

1. Go to Settings → Battery and Performance → Battery Modes.
2. Choose Performance mode (if available) or Balanced mode (but not Charge Saving!).
3. Open Settings → Applications → Permissions → Autostart and make sure system processes (such as Miui BatteryManager) are not blocked.
4. In Settings → Special features → Battery, turn off the option Charging Optimization (if any).

Important! Once you activate fast charging, the smartphone can get hotter than usual. That's normal, but if the temperature is above 40-45 ° C, the MIUI will automatically reduce the power.

• 🌡️ Do not charge your phone in direct sunlight.
• 🎮 Do not play heavy games while charging.
• 📵 Remove the case (especially silicone – it worsens the heat sink).

Step 4: Check the compatibility of the charger

Not all 33W chargers are equally useful, for example, the adapter from the Redmi Note 10 Pro (also 33W) may not give the maximum speed on the Redmi 10S due to different protocols.

If you use a charger from another device, check its protocols. Xiaomi Redmi 10S supports:

• Quick Charge 3.0/4.0 (up to 18W)
• USB Power Delivery (PD) (up to 33W)
• MI Fast Charge+ (branded protocol Xiaomi)

Critical information: Never use chargers above 33W (like 65W or 100W from laptops)! Although the Redmi 10S won't physically burn, the charging controller will continuously reduce current and you won't get any speed gain, but you risk shortening battery life.

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The best option is the original 33W MDY-12-ED adapter + USB-C 3A cable. This guarantees maximum speed without risk to the battery.

Step 5: Diagnosing Problems – Why Charging Is Still Slow

You did everything according to the instructions, but the Redmi 10S still charges like an old lady?

• 🔋 Worn-out battery: If the battery has lost more than 30% of its capacity, the charging speed drops. Check the wear in AccuBattery (Health section). If it's below 80%, it's time to change the battery.
• 🔌 Port problems USB-C: Try cleaning the port gently with a toothpick (turning off the phone!) If the contacts are bent, contact the service.
• 📱 Firmware failure: perform resetting of settings through Settings → The phone. → Resetting settings (don’t forget to make a backup!).
• 🛠️ Faulty power controller: if the phone doesn't recognize charging at all or shows "Slow Charging" even with the original adapter, it's a hardware problem. Solution: diagnostics at the service center.

Another nuance: Xiaomi sometimes limits charging speeds when the battery is low (less than 15%) or hot. That's OK, that's how the battery is protected. If you need to charge urgently, turn off the phone for 10 to 15 minutes, then plug the charger in, and the speed should recover.

⚠️ Warning: If the phone shows a message after the charger is connected, "This charger is not supported," but it charges, don't ignore the warning.

Step 6: Alternative ways to accelerate charging

If standard methods do not help, try these techniques:

1. Turn on Air Mode: Shutting down the network (mobile and Wi-Fi) reduces the load on the processor, and the phone charges faster. How to activate: swipe down from the top of the screen → the icon of the airplane.
2. Use Do Not Disturb mode: notifications and background processes also slow down charging. Enable via the notification panel or Settings → Sounds and vibrations → Do Not Disturb.
3. Charge the phone off: when switched off, the Redmi 10S can take more current.Press and hold the power button →Switch off.
4. Update your firmware: newer versions of MIUI often optimize charging algorithms. Check for updates in Settings → About Phone → System Update.

The optimal range for fast charging is 10–35°C. If the room is too cold (below 5°C) or hot (above 40°C), MIUI will limit current.

The Redmi 10S supports MI Turbo Charge technology, which accelerates charging over the last 10-20% of capacity, but it only works when all the conditions are met: the original charger, 3A cable, power-intensive processes turned off.

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If you need to quickly charge your phone before leaving, use this life hack: turn on the flight mode, turn off the phone and connect to the phone. 33W-In 30 minutes, the battery will charge 50 to 60%!

FAQ: Frequent questions about fast charging on Xiaomi Redmi 10S