On a road trip a few years back I had my battery die in the bird. I had literally load tested it before leaving and it checked good. We road down a bumpy road into a state park to take a break and when we went to leave, absolutely nothing. We tried push starting, got nothing but a backfire, a few seconds of sporadic ide, then dead. All she wrote.
Rode an hour and a half round trip to an auto parts store and replaced the battery and were back in business.