Q:How can I be sure I'm buying the right ac adapter?
1.) Check the web site of the manufacturer of your laptop under ac specification.
2.) Compare your old ac specifications with the one you are purchasing. Make sure the Voltage(V), Amps(A) and Watts(W) are all matching (some discrepancy in A and in W are allowed, they should be equal or greater) the specs of our ac. For example: 18.5V 3.5A 65W
3.) Make sure the tip of the ac fits your laptop (they are all different!). All our listings have the picture of the tip.
4.) If you see your laptop model in the headline title of the ac, it should match your laptop 99.9%. If you see it in the item description field there could be some discrepancies that we try to fix as soon we find them.
If you still have problems,pls email us at firstname.lastname@example.org.