Check the battery terminals.
While I agree that the extended warranty is a great idea, it also has to do with the relationship with you and your dealer.
I've read stories of people taking bikes to their dealer, WITH THE EXTENDED WARRANTY, and the dealer just keeps saying, "Oh that's normal" or worse yet, (to me) replacing the broken parts with the same parts that are known to break, and not fixing the cold, rather only the sniffles.
“When the going gets weird, the weird turn professional....” ~ Hunter S. Thompson~
R.I.P. Rubberdown. 1971-2012