Viki 5 I had trouble with my car for a little bit regarding the battery drained due to the 24hr recording camera inside of the car. I called the insurance company, they came and jumped started the car for me, that same day I ordered this. I like the fact that this can double as a portable power source while I’m out or while camping. The item arrived promptly I got the it charged not knowing I will get to the test its power that same day…it worked like magic. Very easy to use and you can tell whether it’s connected properly or not. Power were strong. The car started immediately. Amazing price! Definitely a must have for emergency.