I don't use Elevation data but I found this thread interesting and Googled the subject. I found an interesting article which included this information:
The full article is here.
Bob
The XOG has a claimed battery run time of up to 2.5 hours but 1-1.5 hours seems to be the reality. It seems to be designed for use when plugged into a 12V outlet, even though it claims to be a crossover.
Bob