As the weather gets colder, your battery has to work harder to start your vehicle. If all the connections are clean and tight, enough current will flow to start the car every time. If, however, there is corrosion or loose connections, it can impede current flow, resulting in not getting enough juice to the starter to turn the engine. Corrosion is the worst enemy of the starting system. Aside from increasing the resistance in the battery cables, dirt and corrosion on the battery become a conductor that can suck power out of the battery.
