Battery problems rarely arrive out of nowhere. Long before a car refuses to start or a phone dies at 20 percent, small changes in behavior reveal that the power source is struggling. I look for those ...

Although internal combustion engines rely on burning fuel and air to run, they do need some help starting up in the first place. In the old days, that could mean standing outside your car and getting ...

Four Wheeler reader Allan asks:I have a 1985 and 1986 CJ-7 both set up almost exactly the same with the following exceptions: the 1985 has dual batteries with Kirkland batteries (6 months old) and a ...

Once again, [Afroman] is here for you, this time breaking down electrolyte and the terminology behind batteries. Volts and Amps are easy mode, but what about Amp hours? They’re not coulombs per second ...