Jump Starter failed to start a 2.0L gasoline car

Bought here alixp.ru/hE
Ambient temperature is 11°С

[@xaviervidal6351]

I bought one a few months ago. Fortunately I never have need to use it. One day I tested if it was charged et and nevermore charged. In my opinion it is al most a swindle.

[@tarekkhayat7544]

Hello, I have one. But I'm not working anymore! How to change internal batteries

[@muhammadtwaha516]

Maybe be you didn't set on 12 voltage