Tech Tip: Can I use my jump starter to charge my dead vehicle battery?
The answer to this one is complex, but the easy answer is “not really.” Yes, if you connect your fully charged jump starter to your dead car battery, over time, the batteries will equalize. So, your dead battery’s state of charge will rise. But, rise enough to power your vehicle? Maybe, but not likely. The better answer is 1.) jump start the vehicle and let your vehicle’s alternator charge the battery – that’s the job of the alternator, or 2.) attach a quality battery charger, like our PRO-LOGIX PL2310, to your vehicle’s battery and charge it right. Of course, there could be bigger issues that caused the dead battery in the first place, such as a defective alternator, but essentially, the answer is no, trying to “charge” your battery with your jump starter isn’t particularly effective.
Information provided by Clore Automotive
