I did put the battery back in and it did start the 2.7 inline 5 diesel engine. I will see how long it can keep a charge days,weeks, or months if it fails again quickly I have 2 types of additives that claim they can renew the battery life one is 1 tablet/cell the other is in liquid form and says to add 1.5 ounces to each cell and will eliminate sulfation and renew battery I will give that a try before spending $170 for a new one boy did batteries jump in price last 10 yrs. Wish you could still buy the lifetime batteries like you could about 40 yrs. ago. oops giving my age away.