We often hear that leaving your laptop connected to the mains, when it has reached 100% charge, damages the battery. What is it really ?
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Most of us charge our mobile at night. While a full recharge takes a few hours at most, the phone often stays plugged in for eight hours or more! However, smartphones are equipped with a batterie lithium-ionbatterie lithium-ion, which has the advantage of recharging quickly, but is damaged when subjected to too high a voltage. In addition, overcharging can overheat the battery and in some cases cause its inflammationinflammationas we saw with the Galaxy Note 7 which took feufeu.
To avoid this phenomenon, however, most manufacturers have equipped phones with systems that automatically stop the current when the charge is full. The problem is that even when not in use, the phone experiences a low discharge. As soon as the battery drops below a certain level, it will restart the charge once more until it reaches 100%, and so on several times during the night. So many “mini charges” that wear out the battery prematurely and overheat the phone.
The charger alone also consumes electricity
Moreover, the telephone is not the only one to consumeenergyenergy. When the battery is 100% charged and the charger remains plugged in, the charger continues to absorb electricity. According to the Berkeley Lab, a charger thus represents an average power of 3.68 wattswatts when charging and 2.24 watts when left plugged in while the battery is full. A useless waste of energy.
To increase the durationduration battery life, it is recommended to always keep a charge between 30% and 80%, i.e. do not wait until it goes completely flat or charge it to the maximum.