Chuck- I went through the same thing like you are. This is the best answer that SrTelemaster150 sent us:



The Sears price is about $60 which means this is a sale item. I paid that for my 650 amp and this one is the 950 amp. You use a/c to recharge it. It weighs half of what a lawn & garden battery does. And it turns the Dynatron over like you wouldn't believe. It's loafing when it turns over my Saito 125. No more lugging around batteries for me, and I can use it for jump starting cars, lawn mowers, etc too.