I have a problem with one of the four 6v batteries that I just installed earlier this month. I have tested the voltage on all four and 3 of them read 6.4v but the 4th one reads 5.4v. It stays like th...
Very carefully tip the battery over and remove the fluid, rinse the outside so you don't get acid all over everything, as that stuff will eat holes in you an anything it touches, refill with water, take it back and say its dead with your best straight face, if they tell you it just needs a charge, see how straight of face they have when lying to you.