A close friend of mine introduced me this jump starter. Since global coronavirus pandemic, I've been working from home for the most of time. I barely drive my SUV. Earlier today, I couldn't start my vehicle because the battery was weak. I grabbed and connected the jump starter to my SUV. After the green light was on, I immediately started my car. It worked on my first try. The other bonus is it has quick charge function. The quality is excellent and very easy to use. I would recommend it to whoever has a car.