Choosing the right gauge of jumper cables for your car is an important decision that can mean the difference between a successful jump and a dead battery. 4-gauge jumper cables are thicker than 6-gauge cables, meaning they can conduct electricity more efficiently over a longer distance. This makes them ideal for larger vehicles such as trucks or SUVs with bigger engines and higher power demands. They’re also better suited for colder weather conditions since their thicker design allows less voltage to be lost through resistance in cold temperatures. On the other hand, 6-gauge jumper cables are thinner and lighter than 4-gauge ones, making them easier to store when not in use and convenient for smaller vehicle types such as cars or motorcycles with lower power demands. However, they may not be able to provide enough current or travel far enough if used on larger engines which require more amperage from start up.