A portable battery charger for your car is a lifesaving tool. Imagine being stuck in blistering cold weather with a drained battery. Even worse, being stuck in a less-than-savory part of town and having to ask for a jump. Trying to flag somebody down can be almost impossible — if not downright dangerous. With a portable battery charger, you can jump that battery right to life without needing to rely on favors from friends or random acts of kindness from strangers. These are compact units that store away in dedicated cases that you can easily fit in the trunk or under the seat. Once you get your hands on one, it will likely be your favorite part of your emergency roadside tool kit. It may be a problem trying to get your hands on a reliable portable charger. The good news is that there are plenty of great offerings on the market. Let’s dive into the best and help you decide which one you need.