[Jordan18124]

when fully charged my laptop lasts about 10 minutes when not plugged in!

is there anything i can do or do i need to buy a new battery? if yes, how much are they? (£)

 

[Tyree]

If you're certain the battery is being charged then yes it needs to be replaced.
Prices vary and you didn't include the Make & Model in your post.

 

[Jordan18124]

it's Acer TravelMate 5320

 

[Tyree]

From Acer: http://store.acer.com/dept.asp?dept_id=02-001