When they say something like “60 days battery life” what they mean is using the device for half an hour everyday for 60 days.
OP is arguing that it would make more sense to just say the continuous use battery life, which in the above example would be 30 hours (60 × 0.5)
I went on a whim to hear him speak back in 2008 and was so impressed ended up voting for him.
Granted, this was in Vermont, so it was already 100% clear that Obama was going to win the state.