제가 델 노트북 어댑터를 잃어버렸는데요..ㅠㅠ

모델은  inspiron 13z 이고요

그래서 살려고 검색해보니 

http://accessories.ap.dell.com/sna/productdetail.aspx?c=kr&l=ko&s=dhs&cs=krdhs1&sku=492-10822&baynote_bnrank=0&baynote_irrank=5&~ck=dellSearch
이거랑

http://accessories.ap.dell.com/sna/productdetail.aspx?c=kr&l=ko&s=dhs&cs=krdhs1&sku=450-14590&~ck=bnpd&~bk=gr:ProductRec_default,g:AlsoUsed,rk:&~lt=popup

이거랑

이렇게 두개가나오는데요

90w랑 65w랑 차이가 먼가요...가격차이가 엄청나는데...ㅠㅠ 가난한 대학생이라...

노트북 뒤에는 19.5v 이렇게 적혀있고 3.34A  이렇게 적혀있어요....

잘 아시는분 도와주세요 ... 과제해야하는데 ㅠㅠ