Products trademarked iTEKIRO are marketed and sold exclusively by EPMUSA at Amazon.com. It is a DC CAR CHARGER, NOT AC ADAPTER. When attached to the 12V car cigarette lighter outlet, this Acer Aspire 4810TZ-4120, 4810TZ-4183, 4810TZ-4474, 4810TZ-4696, 4820T replacement laptop auto adapter notebook car charger powers your laptop and charges your laptop battery in your vehicle. Input: DC 12 - 24V; Output: 19VDC 4.74A 90W Max (Replacing 65W genuine adapter); Dimensions: 110 x 43 x 30 mm - 4.33 x 1.69 x 1.18 inch; Weight: 274 g - 9.7 oz. Please note the car charger is not original, it is a replacement made by iTEKIRO. Your purchase of this adapter comes with 100% satisfaction of 30-day money back and 1 year replacement warranty, plus a complimentary 10-in-1 USB charging cable for smart cell phones.