How to turn off fast charging on Xiaomi Redmi 4X: all ways

Xiaomi Redmi 4X is one of the most popular budget smartphones of 2017, which is still used by many users. Despite its modest technical characteristics, the device is famous for its endurance and long battery life. However, over time, owners face the problem of battery degradation, and fast charging can accelerate this process. If you notice that the battery has become worse and the phone heats up while connecting to the network, you may want to consider turning it off.

In this article, we’ll look at all the ways you can deactivate fast charging on the Redmi 4X, from standard settings to hidden engineering menu features. You’ll also learn what the implications are for your device and how to properly charge your smartphone after you turn off the accelerated mode. It’s important to understand that on the Redmi 4X, fast charging is software-based, not hardware-based (unlike Xiaomi’s flagships), so it doesn’t require physical intervention.

Why do you need to turn off fast charging on Redmi 4X?

Quick Charge (or Fast Charging) is convenient when you need to recharge your battery immediately, but there is a downside to this mode:

• 🔥 Battery overheating: When you charge fast, the battery temperature can rise to 40-45.°C, which reduces its resource.
• 📉 Accelerated degradation: Lithium-ion batteries lose capacity faster at high charge currents.
• ⚡ Stress instability. On budget models (like Redmi) 4X) The power controller may not be able to handle the load, which leads to micro-disruptions.
• 🛑 Failure risk: In rare cases, fast charging can cause sudden reboots or shutdowns during the process.

Research shows that with constant fast charging, battery capacity drops 15-20 percent faster than normal mode. If your Redmi 4X is not new (and 2017 models are not exactly), abandoning accelerated charging can extend battery life by 6-12 months.

⚠️ Warning: If you use a non-original cable or power supply, the risk of overheating and battery damage increases by 2-3 times.

Method 1: Disconnection through standard settings

The easiest and safest method is to use the built-in MIUI options. Unfortunately, there is no direct “Disable Fast Charging” button on the Redmi 4X, but you can limit the charge current through the power saving mode.

Follow the instructions:

1. Open Settings → Battery and Performance.
2. Go to Battery Settings → Power Saving Mode.
3. Activate the option Extreme energy saving.
4. Connect the charger – the charge current will automatically be limited to ~500 mA (instead of the standard 1-1.5 A in fast mode).

This method does not turn off fast charging completely, but significantly reduces the load on the battery.

Method 2: Engineering menu (hidden settings)

To completely disable fast charging, you will need access to the Engineering Mode, which works on all versions of MIUI, but requires caution – incorrect changes can lead to failures.

Instructions:

1. Open the Phone app and enter the combination: ##4636##.
2. In the menu that opens, select Battery Information.
3. Scroll down and find Fast Charge Config (or similar, depending on the firmware version).
4. Change the value from Enabled to Disabled.
5. Save the changes and restart the smartphone.

If there is no Fast Charge Config, try the alternative route:

Settings → About Phone → MIUI version (click 7 times to activate developer mode)


Settings → Additional → For Developers → USB- Debugging (enable)




Connect your phone to your PC and use the ADB- command:




adb shell settings put global fast_charge 0

⚠️ Warning: After disabling fast charging through the engineering menu, some users note that the smartphone will no longer recognize the original Xiaomi chargers, in which case resetting to the factory will help.

Method 3: Third-party applications for charge management

If the standard methods don't work, you can use specialized utilities. 4X:

• 📱 AccuBattery – analyzes the state of the battery and allows you to limit the current charge to safe values (800-1000 mA is recommended).
• ⚡ Battery Charge Limit – sets a charge limit (e.g. up to 80%), which reduces battery load.
• 🔧 Kernel Adiutor (requires root) – allows you to fine-tune power settings, including turning off fast charging at core level.

Example of settings in AccuBattery:

1. Install the app from Google Play.
2. Go to the Charging section → Current restriction.
3. Set the maximum value in the range of 800-1000 mA.
4. Activate the Quick Charging Warning option.

The advantage of this is flexibility: you can turn on/off restrictions depending on the situation, but keep in mind that the background operation of these applications can slightly increase battery consumption.

💡

If the smartphone starts charging too slowly after the fast charge is turned off, try using a 2A charger (but without Quick Charge support) to speed up the process without risking the battery.

What to do if the fast charging does not turn off?

Sometimes users are faced with the fact that even after all the manipulations, the smartphone continues to charge in an accelerated mode.

If none of these methods worked, the radical option is to run a customized Recovery firmware (like TWRP) and then install a modified kernel, but this requires unlocking the bootloader and may be insecure (if it still works).

How to charge Redmi 4X after fast charging is turned off?

Turning off the fast mode is only half the battle, and to maximize the life of the battery, follow these recommendations:

• 🔋 Keep the charge in the range of 20-80%. Full discharge and 100% charge reduce battery life.
• 🌡️ Avoid overheating.Do not charge your phone in direct sunlight or while playing games.
• 🔌 Use the original power supply. >2A can ignore software constraints.
• 📵 Disconnect your smartphone from the network after reaching 100%. Full charge boosts degradation.

Fun fact: Battery University research shows that a battery that has never been charged above 80% lasts 2-3 times longer than a battery with regular cycles of 0-100%.

💡

Turning off fast charging on the Redmi 4X is most effective when combined with limiting the maximum charge level (up to 80–85%), reducing battery load and increasing the number of possible charge-discharge cycles.

Myths and misconceptions about fast charging

There's a lot of rumors about fast charging, and we're going to look at the most common ones.

1. “Fast charging spoils the battery in 1-2 months” – no, but it accelerates degradation by 15-20% per year with constant use.
2. “Switching off fast charging will make the phone slower” – no, it doesn’t affect performance in any way.
3. "There's no real fast charging on the Redmi 4X" is not quite true. Although the model doesn't support Quick Charge 3.0, it uses a USB Power Delivery-based accelerated mode (up to 10 watts).
4. “After you turn off fast charging, the phone will charge for 10 hours” – no, the time will increase by about 30-50% (from 2 to 3 hours).

It’s important to understand that the Redmi 4X was not originally positioned as an advanced charging system, but its 4100mAh battery is designed to last long in standard mode, and accelerated charging is more of a marketing move than a real need.

FAQ: Frequent questions about turning off fast charging