This laptop comes with a 55Wh battery. Getting a couple hours out of the battery on this computer is doing pretty good. When they designed this laptop they had to make cuts here and there to fit all of the performance into such a slim package. Battery size was one of those cuts. As of right now I do not know of any available aftermarket upgrades that will fit this model. One can always hope that ASUS could possibly release an update that will allow USB-C charging but currently it is not accepted.