Abstract: An electrical connector is provided for a battery charging system. The connector has a first conducting portion configured to conduct sufficient electrical energy to charge, maintain or monitor voltage of a vehicle rechargeable battery, and a magnetically attractive portion configured to be attracted to a complementary magnetically attractive portion on another connector. Also provided is a connection system for connecting a rechargeable vehicle battery to a power supply or a battery monitor. The system includes a first connector and a second connector, wherein the first connector and second connector are each configured to form a mutual magnetic coupling such that an electrical connection is made between the first and second connectors. The connector and system are used for electrically cranked engines such as those in passenger vehicles, commercial vehicles, motorcycles, agricultural machinery, recreational vehicles, motor boats and the like, and in other electrically-powered vehicles.

Abstract: The present invention provides a battery rejuvenation method for rejuvenating a battery, which firstly pre-charges the battery for a short period of time and judges the battery condition by comparing the battery voltage to a preset reference voltage value, and then alternately performs an equalizing mode operation and a reconditioning operation to rejuvenate the battery until the battery voltage is not higher than the reference voltage value. The operations in equalizing mode and reconditioning mode could enhance the rejuvenating results by each other, which is not only dissolve the lead sulphate crystal, but also bring the electrolyte fluid to a well-distributed and fully-restored state. The present invention also provides a battery rejuvenation apparatus for rejuvenating a battery.