Unlocked garage, car (that has not been previously moved several days) started, not even a tortured whine of the battery (deep discharge). The charger recently obtained by separately purchased extension cord "Comfort Connect" connected (= foolproof). Garage locked. Overnight make it easy.
The next morning: garage unlocked, seen green light, disconnected from the battery (= just as easily), inserted ignition key, car started, drove off.
What more do you want. This thing does what it does best: Simple help!