And the good battery will take on all the high freq pulse so the sulfated battery will get little or none...
Yes it can keep up to 4 batteries from going dead in the charge mode.. BUt it can only do so if they are all good. a shorted cell will mean that one battery will drag the rest down and assorb all of the charge and turn it into heat.
And in the desufate mode... the BEST battery will take on the high frequency pulse.. As the best battery will exhibit the lowest impedance to the AC style pulse and the other batteries will not see much or none of the pulse. parallel charging will ALWAYS hide the weak batteries. And as others said.. as the battery sulfates up.. it can still go to full change chemically but the surface size of the available cells is greatly reduced, meaning you 1000 amp battery will lose a bit of capacity each year as the cells are slowly covered and rendered usless... untill your 1000 amp battery now test like a tinyt battery of 50 amps.. still charges up to full but will not carry a HIGH load very long anymore. And only one cell needs to go wonky to ruin the whole process.
another point... in the ole days... you could see the engine begin to crank slower when the battery got close it the end. Now the computer controlled cars,, simply will not all the crank cycle to happen if the voltage starts to drop too low, so one day the computer controlled car started fine, then next time it refuses to crank... as the computer see too much voltage drop, cannot tell the timing, or run other sensors and spark timing, so it simply cuts off the attempt to crank over the engine... so now batteries appear to fail "immediately" with no slow crank warnings.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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