jump start power station will not hold its charge when pluged in

ok when i plug the box in it will not take the charge i have the knob turned in the off

there is one of those surge things in the back of it and tryed pushing it but nothing

ahh i have the box open and now i am trying one thing with my batter charger i am

trying to give it a charge thru putting a charge in to the cables that give the jump to the car batter if you under stand i hope you do . but i bought it like it was i just thought i can fix it so if you can think of any possibles thanks charles