Quote:
Originally Posted by serialk11r
I'm not too familiar with how batteries work, but I always thought that heavy loads cause damage or at least reduce lifespan significantly, which is where the capacitors would help. Aka, it's not heat that kills them, high current draw can do it too. If we're talking lead acid, I feel like caps would increase the battery's lifespan considerably because they're very sensitive to depth of discharge.
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As you said, it is depth of discharge that kills lead acid batteries. The high cranking amps don't really harm the battery, so caps won't extend battery life.
Quote:
Originally Posted by oldtamiyaphile
Have you measured that? 290A x 12v= 3500W that's nearly 5hp!
About a fifth of that is more typical, if you've seen a 290A inrush current it's only for a fraction of a second and batteries are generally capable of handling those kind of currents in small doses.
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That was measured half a dozen times with little variance, and represents peak amps and not average. The Camry is similar, peaking at 255A. I'm sure lead acid batteries can handle the current, but not so sure a small LiFePO4 pack could.