Quote:
Originally Posted by ZX-10R
Batteries have a typical cycle life assuming no more than about 70% discharged. Lead acid and AGM tolerate somewhat lower discharge but I suspect many of these failing batteries are almost fully discharged on multiple occasions and not charged properly. Think about how much more juice it takes to turn over a 6.2L on multiple occasions
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I don't doubt that the level of discharge to crank this motor is larger than in the 4/6 cyl versions. Still, charging systems should be designed to recover that power in a "small" amount of time so that short trips and frequent starts aren't overly problematic.
AGM batteries are sensitive to overcharging and doing so will shorten their lifespan and reduce the total charge they can accept, and I honestly wonder if swapping them out for a standard Lead Acid would actually remedy problems in these cars.
The ONE benefit of AGM batteries that we get in these cars is the fact that that can be located "inside" the car (in the trunk) because there is no venting required for them. Beyond that one specific thing (that frees up precious space under the hood), I can find zero benefits to this kind of battery in this car but a number of potential disadvantages.