There is no one single answer to your question. Two 6-volt batteries in series will give you 12 volts. CCA will depend on the size of the batteries used in this configuration. CCA will not add, but will be equal to the lesser of the two batteries if they are not the same size. ' Two 12-volt batteries in parallel will still be 12 volts, but the CCA will be equal to the sum of the two batteries used. So, two BIG 6-volt batteries CAN be better than 2 smaller 12-volt batteries. But, in general, the 2 12-volt batteries will probably be better simply because they will be higher capacity. The real answer is to look at the sizes and ratings of the batteries in question. The preferred setup would be the ones with the higher capacity CCA.
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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