Update: Tried the product to restart a 2.5l Hyundai iLoad. Just did not work. Returning it. Oiginal review: Remember 20 years ago? When goods from China hit the shores with appalling translations of manuals. Well those days are still around when you get a FNNMEGE Jump Starter kit. Just follow your instincts when using it, the manual actually mixes up inputs and outputs apart from being badly translated. Anyway, the product seems sturdy. I really like that it can be charged from the car battery (obviously before you have to use it when the car battery is flat). I bought a 60W USB cigarette plug USB converter with it for fast charging. I have not used the product for starting a car, but the presentation (packaging, zipped bag etc) is very professional.