Hi Paul,

Hope you're ok. Singular and plural versions of keywords can be both covered, whether both on the same page or by creating 2 different pages for each.

Here my advice would be to go for the plural as Google Insights sees a noticeable difference in search volume and not just a small correlating difference:
http://www.google.com/insights/search/#q=Acer%20Laptop%20Charger%2CAcer%20Laptop%20Chargers&cmpt=q

You can then create another page later on for the singular, perhaps a blog post entitled "10 places you may have left your Acer laptop charger" ;)

duh. insights says singular is searched for more. the other way round from my last advice - target singular for long term and see how the singular page performs with the plural keyword. if it doesn't perform as well as you'd hope then create a second page for the plural.

sorry for confusion!