What a neat product! To be honest I didnt even realize that this was a thing- jumper cables you can charge with a power bank. So clever. When I plugged this in for the first time, it was already almost fully charged. Also- I charged it and then didn't use it for over a week, and it was still at 100%, so I believe this holds its charge for a long time. I haven't needed to jump my car battery, but my husband's motorcycle battery needed to be jumped and it worked great. It's so nice and compact that I will be keeping it in my car. I love that I don't need another person/vehicle. The only thing I would change is that the cables are a bit short. It works great. Also, it has a flash light on it, including a strobe setting. I think that's wonderful in case of an emergency at night. But also just to see if you need to jump your car at night. This is a clever product and I am very glad to have it. I feel safer driving around.

I wasn't sure what this portable jump starter was capable of. I was hesitant in it's ability because it's so small and compact. Boy did I under estimate it. I used it to jump start a very old, very not good battery in a car that has been sitting for months. It tackled to job with no hesitation on the first try.

I really like having the peace of mind of having this in my car in case of emergencies. It was quick to charge out of the box and easy to understand the instructions. I like that there is a light on the end of it as well. Charged well too!