This is my backup charger for my backpack. My original Charger is at home and plugged into a Hub, so 1 Thunderbolt cable gives my USB, SD and power. I don't like to remove it from the environment because cables.So I bought this one to carry with me. It's great. Does exactly what it should. Now, I run a 15" MacBook Pro with the Vega Graphics Card. When I edit videos this charger keeps the laptop charged but the battery percentage slowly declines. The original charger is 85W, this one is 60W. It works for me and I wouldn't want anything else as this keeps my laptop topped off or extend the life when I need it.