Can One Battery Charge Another. Then you recognize the answer-One of the power bank can charge the other till the primary one runs out of power or the other absolutely fully charged. Park both cars in a safe place.
However the preferred method for keeping the batteries equalized is to connect to the positive at one end of the battery pack and the negative at the other end of the pack. Actually it is not possible to charge a 12V battery with another 12V battery directly. Lets say your powerbank was a 12v 100ah battery 1200wh.
48V 6A Golf Cart Bare Wire Battery Charger For EZgo Club.
If its very large then the 12v battery will not charge it to even 9 volts and you can then connect the 9v battery and charge it to 9v. A car battery does not have enough voltage to charge another cars battery by itself. Lets say your powerbank was a 12v 100ah battery 1200wh. For example if a neighbor becomes angry at another neighbor and purposely throws a rock right at the neighbor resulting in injury and pain then throwing the rock could result in criminal battery charges.
