I know that one of the big innovations in the MacBook Air was in the battery (which gets most of the internal volume of the computer!)
What is a normal loss of battery life (change in usable time on battery starting from a full charge) for a mid-2011 13" MacBook Air? After how many charge cycles does one expect to see a substantial reduction in usable time? Is there any recommended course of action for someone to take to slow or reverse this degradation once it begins?