Batteries wear out faster above 80% capacity. It is therefore recommended to avoid charging them overnight: “They would spend too much time at 100% and this would damage them prematurely”, explains Olivier Simon. Especially since some brands are not very cautious:
“While testing the charging of mobiles from different brands, we found that several models send regular surges when the battery is at 100%, to keep it fully charged. It’s bad enough for her. »
As a precaution, it is better to apply the same rule whatever the brand: “Charge your battery in the morning, when you shower, for example”, advises Olivier Simon.
If you want to give more attention and energy to this problem, take a look at the battery settings of your mobile: some models, from Samsung, Apple, Sony and Google, offer a smart setting. At night, to avoid staying at 100% for too long, they monitor the user-programmed alarm, and block the charge at 80% for several hours, then push it to 100% only at the last moment. In most cases, it is up to you to enable this feature.
If you’re willing to put a lot of effort into protecting your battery, you can go one step further: make sure the gauge never goes above 80%. A painful solution, because it reduces the autonomy of the smartphone on a daily basis and forces you to monitor the recharge like fuel on the fire. On Android, you can be assisted by an application that issues an alert when the charge passes the fateful threshold of 80%. On iOS, you can use the Shortcuts app for this.
Some users allow themselves to take the charge up to the 85% threshold, because manufacturers all take a safety margin: “the 100% you see on the screen is never the full capacity of their battery. Some brands, more cautious, set this 100% further from the maximum battery capacity than others, ”explains Olivier Simon.