Why you should avoid charging your phone all night

For most of us, plugging the smartphone into a socket before sleep is an automatic action intended to ensure we start the day with a full battery. Although it is a convenient and very common habit, leaving the device connected to electricity for long hours causes accelerated aging of the battery cells. In a tutorial video on the technology and science channel The Passive Explainer, the process that occurs in the battery during charging is explained: "Lithium-ion batteries age at the fastest rate when they are kept fully charged and at a warm temperature for prolonged periods."

The Trickle Charging mechanism: why does the battery wear out?

When the smartphone reaches 100%, charging stops for a moment, but resumes immediately when the battery drops to 99% due to routine background activity. This process, known as Trickle Charging, repeats itself dozens of times at night and leaves the energy cells under constant pressure. The channel illustrates the effect of prolonged stay at peak voltage using a simple physical analogy: "It is exactly like leaving your muscles contracted throughout the night - you might survive, but you will hate the morning." As a result, the battery discharge rate during the day becomes faster.

The effect of heat and wireless charging

Beyond the continuous electrical voltage, another significant factor for battery wear is the rise in temperature. As emphasized in the video: "Heat is the real villain in this story," especially when charging the device under a pillow, inside an extra-thick protective cover, or in an area without proper air circulation. Another topic raised in the review is wireless charging, which inherently emits more heat compared to regular wired charging. While standard charging pads are not dangerous, a combination of wireless charging throughout an entire night in a warm environment contributes to a faster decline in battery health.

Smart charging: the answer from Apple, Samsung, and Google

To deal with battery wear at night, mobile manufacturers have integrated protection mechanisms into operating systems. The "Optimized Battery Charging" feature on iPhone, along with similar features on Android devices like Samsung, Pixel, and OnePlus, learn the sleep routine and delay charging beyond 80% until close to the wake-up time. Ultimately, it is a balance between convenience and hardware preservation.

As summarized in the video, night charging is a legitimate compromise between daily convenience and slight wear, but those who want to maintain a battery capacity of 95% even after several years of use can adopt several simple habits.

Summary of action steps and instructions:

1. Activation of the adaptive charging mechanism: enter the battery settings on the device and ensure that the smart charging feature is enabled, to prevent prolonged stay at 100% throughout the night.

2. Charging in short segments during the day: connect the device to electricity during waking hours - in the morning, next to the work desk, or during rest - instead of leaving it connected throughout the night.

3. Maintaining a range of 80% to 90%: disconnect the device from electricity before it reaches full charge, and avoid reaching a state where the battery drains to 0%.

4. Charging on a ventilated surface: place the phone on a hard and open surface (like a nightstand), and avoid placing it under a blanket, pillow, or inside a cover that traps heat.

5. Use of reliable charging accessories: be sure to use chargers and cables manufactured by well-known companies, and avoid cheap imitations that do not regulate the flow of electricity.

Alongside the right habits, it is important to adhere to basic safety rules: do not use damaged or very cheap chargers, and avoid completely placing the phone, watch, and earphones together on a wireless charging pad under a blanket. Maintaining a ventilated environment and controlled charging will allow you to maintain battery performance over time.