A combination of a power pack electronic retractable leash, and a collar comprised of electronic components for tracking an animal wearing the collar； the retractable leash has a casing comprised of a spool located therein and which collects a leash line when the leash line is retracted； a power pack and related electronic PCB for power management； the leash line has its distal end terminated with a leash socket configured and sized for fitting into a socket connector； the leash socket is equipped with an emitting induction coil and the socket connector on the collar is equipped with a receiving induction coil； when the leash socket is connected to the socket connector, both the emitting and receiving induction coils are positioned proximal to one another so that electrical current can circulates between them so that electricity from the retractable leash battery can charge the battery located on the collar.
