Macbook pro 13 mid 2009 battery problem

Hi all,

my macbook pro mid 2009 model on the battery status it says replace soon i bought it on september 2nd 2009 with apple care i all ready had a new logic board replaced i all ways after charge i take of the charger plug can some one tell me if this is normal and how much will apple charge me for a new battery thanks

Just rested my macbook pro few times now it does not say anything about the need to replace the battery my battery cycle is 1120 after full charge i get 3 hours