you could always charge less frequently and use AC more often, but the way lithium batteries are designed they are destined to die after certain amount of time regardless how you cycle them..
but in 3 years you will proll get something way better whether its Apple that makes it or some other company..
and don't forget there's always this...
[ame="http://www.youtube.com/watch?v=qnjtvMCndcw"]YouTube - Apple iPad Battery Replacement & Repair Directions by DirectFix.com[/ame]
and i haven't researched it lately, but Im sure there is gonna be ppl selling those ipad batteries on Ebay, and I did come across a site that will install battery for you for around $100...
Get the original ipad battery here for around 40 bucks..
Original li-ion polymer Battery Replacement for Apple iPad
So if you think you can do it yourself with the tutorial video, you save a whole...
If you don't wanna risk damaging your ipad cause of your lack of knowledge and experience when dealing with internal electronics, and I am one of those ppl, I have destroyed a lot of electronics this way, then be prepared to be set back about 140 dollarssssssssssss..GL