I'm having trouble finding an auto/air power adapter for my compaq presario 730us laptop. Can anyone recommend one or list  ones that would be compatible? The power specs are: 100-240 VAC 50-60 Hz and I've found ones with those specs. What I'm not sure of is the tip I would need to connect to my particular laptop. I've seen several different power adapters for several different laptops but I have been unable to find mine listed. Any help would be appreciated.
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