AC Adaptor should be compatible with the Asus Zenfone for it to be usable. AC Adapter is also known as the recharger. Mobile is a low voltage substance. The adapter is used to charge the mobile. Since users tend to carry the recharger to most of the places they go to, they often misplace it, thereby warranting a need for a recharger. AC adapter is one of the asus tablet parts that you might want very often.