Why you can’t (or can?) sit on a Xiaomi phone charging: we analyze myths and real risks

Have you ever stayed on social media or games on Xiaomi while your phone is on charge?Most users don't even think about the consequences of the habit - until the battery starts to sit down in half a day or the device starts to warm up like an iron. Smartphone makers, including Xiaomi, rarely talk about it directly, but the constant use of the gadget while charging can lead to irreversible changes in the battery, overheating the processor and even shortening the life of the device as a whole.

In this article, we’ll look at what really happens to your Redmi, POCO, or Xiaomi 13 flagship when you play Genshin Impact and plug in the charging at the same time. Spoiler: the consequences depend not only on the model, but also on which power unit you use, how loaded the processor is, and even the temperature in the room. And we’ll also show you how to minimize the harm if you don’t have to sit on the charge.

How charging and active use affect Xiaomi battery

The lithium-ion and lithium-polymer batteries that Xiaomi smartphones have are designed to run 300 to 500 full charge cycles to a marked degradation. But what counts as a "cycle"? Many people mistakenly think it's a discharge of 100% to 0%. In fact, the cycle is a total discharge of 100% capacity. For example, if you discharged the phone from 100% to 50%, and then again to 100% - it's a 0.5 cycle.

When you’re actively using Xiaomi on charging (especially in resource-intensive tasks), there are several disruptive processes at once:

• 🔥 Battery overheating: temperature above 35°C speeds up electrolyte degradation by 2-3 times, and if the phone is on a pillow or in a case, the heat sink gets worse.
• ⚡ Unstable charging current: the processor requires more power (for example, in games), then less (when watching videos), which causes the charging controller to constantly adjust the voltage, which creates micro-overload for the battery.
• 📉 The “top voltage” effect: if you keep the charge 100% under load, the battery stays in a maximum voltage state for longer (4.35–4.4V), speeds up aging.

According to Battery University research, constant charging at high temperature and load can reduce battery capacity by 20-30% in 6-12 months, while in Xiaomi smartphones with support for fast charging (for example, Xiaomi 12T Pro with 120W), the risks are even higher due to increased heat generation.

Which Xiaomi models are most vulnerable to “sitting on a charge”?

Not all Xiaomi smartphones are equally affected by being used while charging, depending on three factors:

1. CPU type: flagship chips (such as the Snapdragon 8 Gen 2 in the Xiaomi 13 Ultra) are warmer than budget chips (the Snapdragon 480 in the Redmi Note 11).
2. Battery capacity: The larger it is (e.g., 5000 mAh in the POCO X5 Pro), the longer the charging cycle lasts and the higher the load on the controller.
3. Fast charging technology: models with support for 67W, 120W or 200W (Xiaomi 14) heat up more intensely than devices with 18W or 33W.

Especially critical is the situation for smartphones with glass back panels (for example, Xiaomi 12S or Xiaomi Civi 3). Glass is worse at removing heat than plastic or metal, so the internal components heat up faster. If you notice that the case has become hot to the touch, this is a direct signal to stop using on charging.

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Xiaomi models with AI Cooling (such as Black Shark 5 Pro) can manually enable enhanced cooling in settings: Settings → Special features → Game space → AI Cooling. This will help reduce the temperature under intense load.

What happens to the processor and RAM?

When you run a game or edit video on Xiaomi while charging, the CPU (CPU) and graphics accelerator (GPU) are running at their limits.

• 📈 The clock speed is increased to maximum values (for example, up to 3.2 GHz in the Snapdragon 8 Gen 2), which increases heat generation.
• 🔄 The power controller is forced to balance between power supply to the battery and power to the processor, which can lead to performance drawdowns (lagas).
• 🧠 RAM (RAM) It overheats if it's full of background processes. LPDDR5 (for example, Xiaomi 13T) This is less critical than in the models with LPDDR4X.

In some cases, the system can automatically reduce performance (trottling) to avoid overheating, manifesting as sudden friezes in games or slow scrolling on social networks. For example, in the POCO F4 GT at temperatures above 45 ° C, protection is turned on, and the CPU is limited to 60% of power.

⚠️ Note: If your Xiaomi suddenly turns off when using on a charger, this is a sign of the overheating protection hardware, in which case you should let the device cool down in the off state for at least 30 minutes. Re-inserting before cooling can cause damage to the motherboard.

Myths about charging Xiaomi: what is true and what is not?

There is a lot of conflicting information on how to charge smartphones “correctly” on the Internet, and we will examine the most popular myths in relation to Xiaomi:

Myth 1: “If you use your phone on a charger, the battery will explode.”

Reality: Modern Xiaomi smartphones are equipped with multi-layered protection against overheating and overcharging. Explosion is possible only when the battery is mechanically damaged (for example, after a fall) or using non-original chargers with a broken current control circuit. However, battery degradation when used constantly on charging is 100% real.

Myth 2: “Fast charging ruins the battery faster than normal.”

Reality: Partly true, but with nuances. Fast Charge does increase battery load, but Xiaomi uses adaptive algorithms. For example, in Xiaomi 11T Pro, charging automatically slows after 80%. The main risk is a combination of fast charging + high load (games, shooting 4K video).

Myth 3: “You have to drain your phone to 0% to calibrate your battery.”

Reality: This is an outdated recommendation for nickel-metal hydride batteries. Xiaomi has lithium-ion batteries that are afraid of deep discharge. The optimal charge range is 20-80%. Full discharge to 0% reduces the lifespan.

How to charge Xiaomi correctly if you can not do without using?

If you have to use your phone while charging (for example, due to urgent work or long trips), follow these rules to minimize harm:

Remove the cover for better heat sink

Use the original power supply unit

Do not exceed 80% of the charge when used actively

Close the background apps (especially instant messengers and games)

Avoid direct sunlight.-->

It is also useful to set up optimized charging in MIUI:

1. Go to Settings → Battery and Performance → Battery Settings
2. Turn on the option Optimized Charging (in some models it is called Adaptive Charging).
3. Set a charge limit of 80-85% (if you have such an option).

For gamers on POCO or Black Shark, there’s an extra life hack: turn on performance mode only for the duration of the game, then switch back to Balanced or Energy Saving. This will reduce the load on the processor in the background.

⚠️ Warning: Never use Xiaomi on a charge if: Power or cable is damaged (e.g. bare wires, melts). The phone has been mechanically impacted (e.g., dropped from a height). In these cases, the risk of short circuit or fire increases significantly.

What if the battery has already died from constant charging?

If you notice that your Xiaomi battery starts to run out in a few hours, even when the phone is idle, chances are that it has dropped below 70% of its original capacity.

1. Check the status of the battery

Type #4636## in the phone app, then go to Battery Information, Battery Health will show current capacity, and you can also use apps like AccuBattery (available on Google Play).

2. Try calibration

Sometimes it helps to completely discharge and charge according to the scheme:

1. Discharge the phone before automatically shutting down.
2. Connect the original charging and wait 100% without turning on.
3. Turn off the charger, turn on the phone and again wait for the discharge to 0%.
4. Repeat the cycle 2-3 times.

This method only works if the problem is incorrect controller data, not physical wear and tear of the battery.

Replacement of the battery

If the capacity has dropped below 60%, the only option is to replace it. In Xiaomi service centers, the original battery costs between 1,500 and 4,000 rubles (depending on the model).

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Even after the battery is replaced, Xiaomi’s habit of charging under load will again lead to its rapid degradation, and without changing its habits, the problem will return in 6-12 months.

Alternative solutions: how to avoid "sitting on charging"

If you're constantly undercharged, maybe the problem isn't with your phone charging, but with the suboptimal setting of the device. Here are some ways to extend the battery life:

• 🔋 Turn off background activity: go to Settings → Annexes → Permits → Autostart and disable autostart for unnecessary apps.
• 📶 Switch to the switch. 4G instead 5G (If you do not need high-speed Internet: Settings → SIM-maps and mobile networks → Type of network.
• 🌙 Use a dark theme on AMOLED-screens (e.g. Xiaomi 13 Lite): this reduces battery consumption by 10-15%.
• 🔄 Reduce the screen refresh rate to 60Hz: Settings → Display. → Frequency of update.

If you play mobile games frequently, consider buying an external power bank with fast charging support. for example, Xiaomi Power Bank 3 20000mAh It allows you to charge your phone without connecting to the outlet, which will reduce the load on the battery. PD (Power Delivery for compatibility with Xiaomi.

FAQ: Answers to Frequent Questions