How to turn off fast charging on Xiaomi Redmi Note 8 Pro: all ways

Xiaomi Redmi Note 8 Pro is one of the most popular mid-range smartphones, which is still actively used thanks to the powerful Mediatek Helio G90T processor and a capacious 4500 mAh battery. However, fast charging 18W, despite its convenience, can negatively affect battery life. If you notice that the phone has become faster to discharge or warm up during charging, turning off the accelerated mode may be the solution.

In this article, we’ll take a look at all the ways you can turn off fast charging on the Redmi Note 8 Pro, from standard MIUI settings to hidden engineering menu features, and the implications for charging time and battery life, and you’ll be able to choose the best option for your case.

Why you should turn off fast charging on the Redmi Note 8 Pro

Quick Charge technology (or Fast Charging in Xiaomi terminology) speeds up the charge recharge process, but has the downside: Research shows that the constant use of fast charging can reduce the life of lithium-ion batteries by 15-20% after 1-2 years of active use.

• 🔥 Increased battery heating - temperature above 40°C accelerates electrolyte degradation.
• ⚡ Increased charging current - high values 2–3A They put additional stress on the cells.
• 📉 Uneven charge distribution – fast charging up to 80% and slowing down at the last 20% disturbs the balance of the cells.

On the Redmi Note 8 Pro, the problem is compounded by the fact that the smartphone does not initially support adaptive charging (like the flagship Xiaomi 12 Pro or POCO F4 GT models).This means that the system does not reduce current automatically when critical temperatures are reached.

• 🛡️ Extend battery life by 30-50% (when used correctly).
• ❄️ Reduce the heating of the body during charging.
• 🔋 Keep the battery closer to its nominal capacity even after 500+ cycle.

⚠️ Note: If you use a non-original power supply or cable, turning off fast charging may not have the expected effect. Cheap accessories often do not meet the declared characteristics and in themselves harm the battery.

Method 1: Disconnect via standard MIUI settings

The easiest and safest method is to use the built-in MIUI options. Unfortunately, there is no direct “Disable Fast Charging” button in the Redmi Note 8 Pro, but you can limit power indirectly through the “Optimized Charging” mode.

Follow the instructions:

1. Open Settings → Battery and Performance.
2. Go to Battery Settings → Charging Modes.
3. Select “Optimized Charging” (or “Sleek Charging” in newer versions of MIUI).
4. Activate the slider and set the charging limit to 80-90%.

This mode doesn't shut down Fast Charging completely, but it reduces the current after you reach a predetermined threshold, for example, if you set a limit of 80%, the phone will charge quickly to that value, and then go to slow mode, which partially solves the problem of overheating and wear.

Update. MIUI last-minute|Check the smartphone model (for Redmi Note 8 without the "Pro" settings may differ)|Reset the battery settings in Settings → Battery → Three-pointed → Drop it.-->

Method 2: Use of an engineering menu (for power users)

If standard settings are not enough, you can turn off fast charging via the Engineering Mode, a method that requires caution, as improper actions can lead to malfunctions in the smartphone.

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. In the menu that opens, select Battery Information.
3. Scroll down to Fast Charge Config (or Quick Charge).
4. Click on it and select "Disable".
5. Reboot your phone to make the changes take effect.

After that, the smartphone will be charged in standard mode (5V/1A or 5V/2A, Important: this method may reset after the update MIUI or reset.

⚠️ Note: Do not change other options on the engineering menu unless you understand their purpose, for example, incorrect settings Voltage or Current can cause the battery to fail.

Method 3: Applications for Charging Control

If you don't want to go through the settings, you can use third-party utilities that allow you to flexibly adjust the charging current and even set a schedule.

Most of these applications require Root rights to work, as they interact with system files. If you are not ready to get Root access, use AccuBattery, which works without additional rights, but with limited functionality.

💡

Before installing any charging control app, check the reviews of Redmi Note 8 Pro users. Some utilities may conflict with MIUI or cause excessive battery drain in the background.

Method 4: Hardware Shutdown (for Advanced Users)

If software doesn't work, you can go for radical measures -- redesigning the charger or the cable -- which is a good option for those who are electrically savvy and willing to sacrifice charging speed for battery life.

Options:

• 🔌 Use of the power supply unit 5V/1A — charger 5V current 1A (For example, from old smartphones, it will automatically turn off fast charging.
• 🔧 Cable modification USB — if you cut the D-links+ and D- in the USB-Type C connector, the phone will be defined as a "slow" device.
• 🔋 Power Bank with Current Restriction – Some external batteries (e.g. Xiaomi Mi Power Bank 3) have Low Current mode.

The advantage of this method is that it doesn't require any software changes and it works at 100 percent, but there are also disadvantages:

• ⏳ Charging time will increase to 4-5 hours (instead of the standard 1.5-2 hours).
• 🔌 Not all power supplies are compatible with the Redmi Note 8 Pro – device detection errors are possible.

⚠️ Warning: If you decide to modify the cable, do so carefully so as not to damage the insulation. A short circuit can disable not only the phone, but also the power supply.

Through MIUI | Engineering menu |Third-party apps | Hardware modification |Until decided-->

What to do if fast charging does not turn off

Sometimes, even after all the manipulations, the phone continues to charge in an accelerated mode, this may be due to:

• 🔄 Work failure MIUI — Try resetting the battery settings (Settings) → Battery → Three-pointed → Drop it).
• 📱 Incompatible firmware – if you use custom software (like LineageOS or Pixel Experience), charging management functions may work differently.
• ⚡ Damaged power controller – in this case, only repairs in the service center will help.

If the problem persists, follow the following steps:

1. Check out MIUI in Settings → About Phone. For the Redmi Note 8 Pro, the current version is MIUI 12.5 or later.
2. Remove the system application cache (Settings → Applications → Application Management → Three-points → Show system → Settings / Battery → Clear the cache).
3. If nothing helps, reset to factory settings (don’t forget to back up the data!).

💡

If fast charging doesn’t turn off after all the manipulations, there’s likely a hardware problem, in which case it’s better to go to a service center than risk damaging the battery or motherboard.

How to check if fast charging is actually off

To make sure that all changes work, use one of the following methods:

• 📊 Checking through AccuBattery - the application shows the current charging current. If the value does not exceed 1000-1500 mA, fast charging is disabled.
• ⚡ Indicator on the power supply – some chargers (e.g. Xiaomi) 33W) have a light indication: blue - fast charging, green - standard.
• ⏱️ Charging time – if the phone charges longer than 3 hours from 0% to 100%, then the Fast Charge mode is deactivated.

You can also use the hidden battery testing menu:

1. Enter the phone combination in the app: ##284###
2. Select Battery Test.
3. Look at the Charging Current setting – if it’s less than 1500mA, it’s fine.

FAQ: Frequent questions about turning off fast charging