I HAVE TRIED SEVERAL JUMP BOXES OVER THE LAST FEW YEARS. ONE WORKED VERY WELL. WHILE 2 OTHERS WERE A DISAPPOINTMENT FROM DAY 1. THIS IS MY 4TH AND HOPEFULLY LAST ONE I WILL BUY. IT IS A GOODALL START ALL 10,000 AMP JUMP BOX. IT HAS STARTED EVERY TRUCK THAT I HAVE NEEDED IT FOR. IT ISNT CHEAP BUT QUALITY NEVER IS. I AM VERY HAPPY WITH THIS JUMP BOX AND HOW IT PERFORMS ON MY TRUCKS AND EQUIPMENT. I AM SHARING MY EXPERIENCE WITH THIS BOX SO THAT IT MIGHT HELP SOMEONE ELSE WHO IS THINKING OF MAKING THIS IMNVESTMENT. UNDERSTAND, THAT WE DID NOT RUN DOWN BATTERIES OR DISCONNECT ANYTHING. WHAT YOU SEE IS REAL LIFE SITUATIONS. HOPE YOU ENJOY.