The author notes that most electronic devices have a threshold below which the battery is effectively useless, if not dead. I think a more useful comparison wo

The author notes that most electronic devices have a threshold below which the battery is effectively useless, if not dead. I think a more useful comparison would be to measure the area under the curve until the voltage drops below the necessary level. Granted that devices may vary, but even drawing an arbitrary line at, say 1.0V would be more informative. As others have noted, I'd like to see a comparison to the much-more-expensive "lithium" batteries. Despite the expense, I've adopted these in preference to alkaline, NiMH, or Eneloop batteries for my cameras. The lifespan is so much longer, meaning less need to carry spares or risk of running out, that they're worth that extra price. But I'm curious just what tradeoff I'm making really making.