Quote:
Originally Posted by sreeve212
It came out to be around 10-20 ma draw which makes sense because it has such basic electronics (no security system, etc.).
Is there anyone out there who has tested these in vehicles for a long period of time? Maxwell gives them 1500 hours life if they are used in high temperatures, which would be usual for engine compartments. That would be my next concern, is whether or not they would actually out-live the life of a car battery even if they (the capacitors) are used in parallel with the battery instead of as a replacement.
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I'd get a more precise reading. 10-20 mA is a huge range considering that you would have half the standby time if the drain was 20mA when compared with 10 mA.
The caps are rated to 150 degress F, so it shouldn't be too big of a concern. I don't think it gets much above 130 under my hood. I'm basing this off of the intake air temperature which is drawn from air inside the engine compartment. Of course, lifetime will improve with reduced temperatures.
Everything you could ever need to know about the caps can be
found here.