Quote Originally Posted by Joe_Black
Do take a good look at your electrical though, as a drain enough to kill your current battery after three days will eventually ruin your Optima as well. No battery is a cure for an electrical problem! If you have a multimeter, take a reading between the positive battery cable and your battery's positive post and take note of the amperage draw. You may find you've got a load somewhere that you shouldn't, and you'll need to track that down and get it on a switched or isolated circuit.
I'll take a look.. I added a constant power wire from the battery that runs my gps and radar detector... even when they are off, it still dies... I should probably run that wire switched from the fuse box... I still hope to be able to run my stereo while I'm camping and still start the car in the morning... With the old battery, if I ran my stereo over 2 hours.. it was dead...

I got the blue top - D31M
http://www.invertersrus.com/optimad31m.html
(not from there though.. I got mine at sears)