About to jumpstart my car

My car has declared war on me. The last time the battery was dead, it was the radio. It pulled 500mA in stand-by. Now the battery is dead again... I hope it wasn't caused by some critter gnawing at cables. That could be expensive...

Didn't manage to start my car today again ;-(

The more I use this thing, the less I like it. I only get about a minute worth of cranking out of it. The battery claims 17Ah, but given that the charging circuit doesn't really permit more than say 400mA of current... I can't really be sure this thing was really full. Maybe the battery is a piece of crap as well.

When it didn't even turn the starter any more, the test-button still indicated 75% full. But that only measures voltage... Internal resistance seems a bit on the high side.

If the starter pulls say 250A, I'd expect to get at least 2 minutes on starter action out of this thing...

I guess I'd haven been much better off buying a car-battery charger...

It seems this thing is really only good for assisting a weak battery, not to fully replace it. Oh well...