Why it is undesirable to charge a mobile phone all night

You may have heard more than once: do not charge your phone for too long, disconnect it from the charger immediately after reaching 100%, do not leave it in the socket overnight, and so on. The “degree” of such warnings may be slightly exaggerated, but this is not a conspiracy theory. It's really not worth charging your mobile all night.

Фото: Depositphotos

Modern mobile phones contain a rechargeable lithium-ion (or li-ion) battery. These batteries charge faster than traditional rechargeable batteries. Therefore, you can connect your iPhone or Android phone to the charger at any time, and it will quickly reach about 80%, writes Time. But, as we all know very well, the smartphone does not hold the battery for a short time. It can be considered luck if the mobile phone lives a day without discharging to zero.

Part of the problem is that the batteries in our phones are relatively small and can only hold so much charge. But that is not all. What matters is how we use our mobile phones. Constantly checking email, texting, listening to music, watching videos, using apps, playing games, and so on. All these actions “eat up” the charge, so the phone sometimes runs out much earlier than expected.

What are we doing? (and maybe you)

We charge the phone all night. We wake up and a freshly charged mobile phone with the coveted 100% mark on the screen is ready. In fact, most phones only need 1-2 hours to get to one hundred percent. And leaving them connected longer is pointless. What happens if you leave your phone on active charge overnight?

There are two pieces of news, and we'll start with the good one. You can't overcharge your battery, so don't worry about it. According to Cadex Electronics marketing manager John Bradshaw, the phone stops "pulling" current from the charger when the indicator reaches 100%. Ido Campos, a spokesman for battery manufacturer Anker, agrees:

“Modern smartphones are smart, they have built-in chips that will protect the phone from charging more than required,” says the expert. - Good chargers also have chips that prevent the charger from delivering more energy than necessary. When the battery reaches 100%, the protective equipment inside the phone will stop supplying current and the charger will turn off.”

And what is not very good news?

Even if the charger shuts off current flow, the charging process will be canceled all night. The device will continue to “hold” itself at one hundred percent to compensate for the slight discharge that will naturally occur during this time. Over time, all this will reduce the battery capacity.

“Lithium-ion does not require a full charge, and in fact, it is not desirable,” says an article published on the University of California website. “It’s better not to fully charge your phone: high voltage wears out the battery.”

Batteries in mobile devices are constantly wearing out since they were first used. This leads to a gradual loss of their ability to hold a charge. That is why those who bought the phone a few years ago notice that the battery began to discharge faster than after the purchase. For example, the Apple website about batteries warns that capacity decreases after a certain number of recharges, as well as with each charging cycle. ”

Leaving the phone for the night, you increase the amount of time your device spends in contact with the charger, significantly degrading its capacity. You force the mobile 3-4 to spend on charging for the month of the year.

What to do?

Do not wait for the phone to approach 0% before connecting it to the power supply. Full discharge wears out the battery earlier than partial charges. Bradshaw recommends that you wait until the mark on the phone drops to 35% or 40% charge, and then connect it to the charger. This will help save battery power. Positive effects and lower temperatures. Life hacking: remove the phone from its case or cover before charging.

Moral of history

The loss of power becomes noticeable, as a rule, no earlier than the second year of use. If you change your phone once every year or two, don't worry about overnight charging - do as you please. But if you have been using phones for several years, try to do as described above. And then your battery will last much longer.

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