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Old 09-19-2018, 07:08 PM   #24 (permalink)
hayden55
Master EcoModder
 
Join Date: Dec 2010
Location: USA
Posts: 1,171

Sport Utility Prius - '10 Toyota Prius II
90 day: 52.98 mpg (US)

300k Sequoia 4WD - '01 Toyota Sequoia Limited 4wd
90 day: 20.19 mpg (US)
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Quote:
Originally Posted by redpoint5 View Post
My plan was to buy 2 lithium-ion batteries. The supercap would live under the hood and provide the cranking juice. The lithium-ion battery would stay in the glove box or somewhere accessible but out of way of the driver. I'd start off with a charged battery; something like 15v so the alternator stays off. By the time the alternator needs to come on, the cabin would already be warm from running the heater.

After parking the car, leave the battery connected. The next time I go to drive the car, I swap the battery with a freshly charged one (and warmed from being indoors). The supercap maintains voltage during the swap so I don't lose memory settings. The whole cycle repeats again, with me taking the previous battery with me to charge while the car sits parked.

No messing with battery heaters. Balance charging done on a proper charger every time I park the car at home.
I guess you already have this stuff? What car is this going in?
Also whats the point of buying two batteries to leave one out in the cold? When you disconnect to replace the battery you will still be resetting your vehicles computers.
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Last edited by hayden55; 09-19-2018 at 07:48 PM..
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