Automotive electrical systems aren’t as complicated as they seem. Much of the technology we use today, from alternators to lead-acid batteries, has been around for a long time, but there are still many people who look askance at a relatively simple task like connecting jumper cables.
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The dangers associated with incorrectly connecting jumper cables or battery chargers can cause a lot of damage or even result in an exploding battery. The good news is that taking the time to understand why a car battery explodes can help prevent it from happening.
There are a few rules of thumb that can help you connect jumper cables safely, but there are also a few special cases that override these rules. Before you use your car to jump-start it, accept a jump from someone else, or connect a charger to your battery, check your owner’s manual to make sure your car has no other connection points besides the battery.
If your car battery is in an unusual location, such as in a wheel well or in the trunk, chances are you will need to use a junction block or some other type of external connection.
