The Snap-on D-TAC ELITE is a diagnostic charger, battery, starting and charging system tester, engine starter, DMM, cable voltage drop tester, with flash-reprogram mode and more. Multi-tasking -- once a diagnostic charge session has been started, the MicroVAT ELITE (top analyzer) can be removed from the charger and used to diagnose other vehicles while the charger continues to diagnose and charge the original battery. Conductance and deep scan battery test technology with 150 amp load capability (clicking sound heard when load is applied). Diagnostic Charge Cycle continuously monitors battery watching trends while maximizing charge acceptance minimizing charge time.