Jim, you have exactly the same problem with balancing the batteries in a 12 volt vehicle. But the closer the batteries are to being in balance to start with, the less of a problem it is. Which is why should always replace the batteries in pairs. Charging the new batteries individually (or better yet, in parallel) helps to ensure they are in balance.
As I mentioned in my first post, most battery chargers have no real voltage regulation. Consequently a battery in an unbalanced pair can be over-charged much more by a charger than by a vehicle's charging system.
If you want to prove this, just run a six volt accessory off one of your vehicle's batteries. It won't take very long before that battery is discharged and the other battery is overcharged.
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Today's Featured Article - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
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