I've had several jump boxes over the years, and none seem to last very long. Does anyone have suggestions on a decent quality jump box at a reasonable price? I know to an extent that you get what you pay for, but even the pricier ones I've had before didn't seem to last a very long time. Right now I'm using a car battery on a 2 wheel cart and jumper cables. It works great, but is not very portable or user friendly for the wife and kids. My interstate battery rep says most of the batteries in the jump boxes are similar in size, and I can get one from him to replace the battery in my current jumper for about $50. That may be the way to go. Anyone had good luck with a certain brand? I'd be interested in hearing.