Changing battery on an iPad3

My wife's ipad3 is getting less and less use from a full charge, once the charge level indicator hits 100% we unplug and now it typically will last 3-5 hours before needing to be charged again... now that's not 3-5 hours of steady use either.



I've watched the battery change process on you tube and it's a bit intimidating, has anyone here done it?



Pls share your experience or recommendations.



Thanks,

Tim

(e7)

Changing battery on an iPad3