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A three-year-old laptop now lasts two hours on battery instead of the original six, although it works normally when plugged in. What is the usual explanation?

Un portable de trois ans ne tient plus que deux heures sur batterie au lieu de six à l'origine, bien qu'il fonctionne normalement sur secteur. Quelle est l'explication habituelle ?

Answers
AThe laptop has a virus that is secretly draining the battery in the backgroundLe portable a un virus qui vide la batterie en secret en arrière-plan
BLithium-ion capacity declines with charge cycles and ageLa capacité lithium-ion diminue avec les cycles de charge et l'âge
CThe charger has become too powerfulLe chargeur est devenu trop puissant
DThe screen resolution has increased by itselfLa résolution de l'écran a augmenté d'elle-même
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