Iron man

Really, but the same batteries last about 4 hours in my bike light....

Cheating Buggers! Takes the rest of us 30 weeks of 15hour+ training.

"Damn you Evoltaaaa~~~~" [McBain impression]

I read somewhere else that it will take a week to complete the course.

Impressive, but I've got my money on the Energizer Bunny.

I am sure that the will use multiple sets of batteries and swap drained ones for recharged ones.

I don't know, I tried Panasonic’s Evolta batteries, a bit expensive but it was the best among the other Japanese brands.

Actually there are other batteries, even from Panasonic, which have more than twice the energy capacity.

I had a battery-operated submarine when I was small and always wondered how long it would run if I let it go out to sea on a calm day.

the point of the triathlon and other human activity is about accomplishment. Replacing human accomplishment is weird and oddly traitorous. Like Big Blue playing Jeopardy. Take the human out of the activity and it is no longer a human activity.