I used an L1 charger at home when I first bought my car; I'm familiar with the process and speed. But I didn't have the foresight to carry the L1 cord with me in my carry-on luggage, nor did I want to buy one to leave behind, so I was missing that very critical component. Rentals do not include any cables, so I had no way to go from a 5-15 outlet to a J1772 or NACS vehicle.