I have a Class C rig with 6 X U2200 6V interstate batteries, they are about 5 years old, well taken care of, toped off regularly. This spring cleaned the corrosion off the terminals and did a regul...
Some of the hydrometers sold in stores aren't very accurate. I had one that I had to throw away. I replaced it with one I got at a battery company which was about three times the price, but I trust the readings.
Miles
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