How to turn off fast charging on Xiaomi Redmi Note

Modern smartphones line Xiaomi Redmi Note equipped with powerful batteries and support accelerated charging technologies such as Quick Charge or proprietary protocols from the manufacturer. This allows you to restore the capacity of the device to 50% or more in just 30 minutes, which is a huge advantage in an active rhythm of life.

However, not everyone likes this pace, as the accelerated process often involves heating the case and potentially accelerating wear of the battery’s chemical cells. The natural question is: can you force the power to limit the charging through software settings to extend the life of the smartphone?

Unfortunately, the standard menu of the MIUI operating system or the new HyperOS lacks a switch that would allow one click to turn off support (fast charging).The system is designed to automatically select the maximum safe power agreed between the adapter and the phone's power controller.

However, there are workarounds that can affect this process, ranging from simple actions with cables to using an engineering menu or special applications, and in this article we will take a look at all the methods available, assess their effectiveness and safety for your device.

Why users want to give up fast charging

The main reason for wanting to limit the rate of energy intake is heat generation. Using Quick Charge or Turbo Charge technology, the battery temperature can significantly increase, especially if resource-intensive applications are running in the background.

High temperatures are the main enemy of lithium polymer batteries, and constant heating during overnight charging or when leaving the phone at the window can lead to electrolyte degradation and a decrease in total capacity after a year or two of operation.

• 🔥 Heating the case: The smartphone becomes hot to the touch, which causes discomfort when used.
• 📉 Battery wear: Fast charge-discharge cycles at high power age chemical cells faster.
• 🔌 Adapter Limitations: Using the original power supply is not always convenient if only an old 5 volt adapter is at hand.

⚠️ Warning: Turning off fast charging is not a panacea: Xiaomi’s current power controllers regulate current by reducing it when it reaches 80% or overheats.

Many users also prefer to charge the device slowly, such as at night, to minimize stress on the power grid inside the gadget.

Power limitation methods without root rights

The easiest and safest way to make the Xiaomi Redmi Note charge slowly is to use the wrong power supply or cable.

If you connect your smartphone to a regular computer USB-port or old adapter with power 5V/1A or 5V/2Oh, the phone will automatically go to standard charging mode, in which case the zipper animation that says "Quick Charge" or "Turbo Charge" will not appear on the screen".

Cables also play an important role: Large currents require thick wires with appropriate resistance; long, thin, or damaged cables often cause voltage to drop, and the power controller compulsorily reduces the charging current to minimal values.

There's another software method that doesn't require superuser rights, but it doesn't work on all models, and it's a hidden engineering menu that's accessed through a standard call.

• 📞 Access code: Enter ##6485## in the "Phone" app".
• 🔋 Battery information: Find the item in the menu that opens MB_06 (rapid charging status) or MB_00 (charge-level).
• 🚫 Limitation: Unfortunately, in most versions MIUI You can only see the information here, but not change the behavior of the controller.

Some models allow you to see current current through this menu, and if you see a value above 2000 mA, you've activated accelerated charging, and understanding these parameters helps diagnose adapter problems.

Use of Engineering Menu and ADB Teams

For more advanced users who aren’t afraid to experiment with system settings, there is a method of debugging through ADB (Android Debug Bridge), which requires connecting a smartphone to a computer and installing drivers.

The method is to change the system parameters that are responsible for the threshold values of temperature or current at which the acceleration mode is activated, but be very careful: an incorrect command can lead to unstable operation of the system.

adb shell settings put global battery_saver_mode 1

The above command activates the power saving mode, which in some versions of the firmware indirectly affects the aggressiveness of charging, limiting background activity and, sometimes, consumption current.

A more radical but effective way is to use special applications from Google Play that require ADB connectivity to issue permits, such as the Battery Charge Limit app, which allows you to set a threshold at which charging stops, which indirectly solves the problem of overheating, although it does not directly change the current speed.

You can also try to find options related to USB in the developer menu (activated by seven times clicking on the build number in the About Phone section). Sometimes there is a "Select USB configuration" item where you can try to select the "Only Charge" mode, which can reset protocol coordination.

The effect of cables and adapters on charging speed

Physical components play a crucial role in how fast your Redmi Note will charge. Understanding the differences between accessories will help you manage the process without digging deep into the software code.

Xiaomi’s original cables often have a label or color-coded contacts that tell the controller to support high currents, and replacing such cable with a universal, low-quality counterpart is the fastest way to turn off fast charging.

When selecting accessories, pay attention to the labeling. If the power supply says "Output: 5V===2A", it will not be able to start Quick Charge mode, even if the phone supports it, which is ideal for those who want to charge the phone slowly.

A dust-clogged Micro-USB or USB Type-C port may not provide reliable contact with the central contacts responsible for fast charging protocols, putting the device in normal mode.

Optimization through MIUI and HyperOS settings

Although there is no direct button to turn off fast charging, there are features in the MIUI shell to help save the battery. In the Settings → Battery section, you can activate the power saving mode.

This mode limits background synchronization, reduces brightness, and, importantly, can limit CPU performance, which indirectly reduces the heating of the device while charging if you are using the phone at this point.

Newer versions of HyperOS have introduced the feature "Optimized Night Charging." The smartphone learns your habits and if you put it on overnight charging, it charges up to 80% and stops, completing the process just before you wake up, which greatly prolongs the life of the battery.

• 🌙 Night mode: Automatic charging pause at 80%.
• 📉 Energy saving: Limiting background processes that reduce overall heating.
• 🛡️ Protection: Warnings about non-original chargers.

⚠️ Warning: It is not recommended to completely discharge the lithium polymer battery to 0%.Try to keep the charge in the range of 20% to 80% for maximum durability.

Some users also resort to installing third-party launchers or themes that may conflict with the system's battery monitoring processes, but this is more the exception than the rule.

Hidden Features and Myths About Xiaomi Charging

There are many myths surrounding Xiaomi charging, one of which is that if you paste certain contacts in a USB connector, you can trick the controller, a dangerous misconception that can short-circuit and cause the device to fail.

Another myth concerns accelerator applications that promise to magically increase speed, which actually purify RAM, but cannot change the physical limitations of the power chain.

The real magic is in the power controller, which takes full responsibility. If you plug a powerful 120W adapter into a phone that only supports 18W, it will take exactly as much as it needs, no more.

It's been said that turning off the phone while charging speeds up the process, which is partly true, because the screen and radios don't consume energy, but the difference in speed won't be drastic, and the heat will decrease slightly if the phone is lying around.

Frequently Asked Questions (FAQ)

In conclusion, charging speed management on Xiaomi devices is primarily a matter of choosing the right hardware. Software methods are limited by the capabilities of the operating system, which prioritizes speed and user experience.

Using the simple physical limitations of weak adapters, you can extend the life of your gadget without the risk of damaging the software.