I've been having problems with Optima Red Tops ever since I relocated my battery to the trunk. If I drive the car every day or two it starts fine. If I let it sit a week I need to jump it. I've was told that its because the length of the cable is too long for the 100amp alternator to keep the battery properly charged. I've now on my second red-top. No hissing yet, but I need to take another look at my new trickle charger.
