aspire minican+ problem

[TobaccoGold]

hi.i have a aspire minican+ with 850mAh battery.the problem is that it takes 2 hours and a half (about 150 minutes)to fully charge the battery.is it normal? i have other devices with double size battery and it takes half to charge.i use the original cable from the box with a mobile phone charger(the model of the phone doesnt have usb type c fast charging)do i need to buy a fast charging adapter?