I think you guys may be talking about two different things. I have regarded (and I think Mike is talking about) the 20-80% DoD as the absolute limits of the pack per the BCM. (On a Prius it's 40-80% IIRC). So when the gauge reads dead zero you're at 20%, full means 80%. MSantos, it sounds like you're talking about percent of usable range rather than percent DoD. Maybe? I like the idea of rigging a data acquisition system to record DoD, charge and discharge rates over time. It would be interesting to compare the varios Honda control schemes with what Toyota does. A Prius will keep the battery at one level all the time but there's always some activity registering on the MFD into or out of the battery even at a flat cruise. Something else I've heard: it has been suggested that batteries have a "break in" period of their own where efficiency increases somewhat during the first part of their life. Any truth to that?