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Old 12-31-2019, 07:08 AM   #13 (permalink)
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Join Date: Dec 2011
Location: Vermont
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Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 21.26 mpg (US)

K-sight - '00 Honda K-sight
Team Honda
90 day: 46.5 mpg (US)

Aerocivic - '92 Honda Civic CX
90 day: 64.49 mpg (US)
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The CR-Z was NiMH in earlier years and lithium in later years. If it works anything like the Insight, Civic hybrid and Prius, a booster pack won't work very well with NiMH. With that chemistry, battery voltage does not correlate well with state of charge, so instead the car counts watts in and out of the battery and calculates how much charge is left based on a model. Voltage is only really used as a sanity check.

In the G1 Insight there is an aftermarket kit which allows manual control of assist and regen, as well as setting battery state manually, but to my knowledge it was the first and last hybrid in which this was all analog and thus easy. I'm unaware of any existing kits for later Honda hybrids.

As for the Prius, I don't know what exists. For lithium based hybrids you might have an easier time.
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