• You're assuming there was somewhere to charge my batteries where I stopped.

    As it happens I didn't charge the battery intentionally to see how long it would last.

    But you ignored the more salient point that people forget to charge Di2, especially sleep deprived people in the middle of ultra races.

  • I forget to change mine when I'm at home, no ultra required. Went out yesterday with half inflated tyres and Di2 at 3%. Still, a ride's a ride.

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