Portable jump starters are effectively defibrillators for your car. Instead of borrowing ... are almost identical to those battery banks you use to charge your mobile phone—with a removable ...

Whether you left the headlights on overnight or parked in the garage all winter, your car battery can die for any number of reasons, most of which are simple mistakes. But they’re also forgivable.

and we often use one in the AutoGuide Garage as an oversized battery bank to charge phones, so they’re useful in all sorts of emergencies. For more information on the best portable car jump ...

a car battery maintainer, also known as a trickle charger. They’re designed to deliver a low amount of power to your battery, just enough to keep its juices flowing until it's time to use it again.