I don't think you add acid to a AGM batteries. One of their selling points.
^^^ The Optima is also AGM.
$142 with free shipping from Amazon.
http://www.amazon.com/Optima-Batteries-8025-160-Starting-Battery/dp/B000MSBU9U
How can I determine the date of my Optima? I assume it it the original battery, but I don't know that for a fact. I don't see a date visible.
Xcentric, do you have a pic of your Sears Odyssey? Kayvan said they were attractive...................:lol
^^^ The Optima is also AGM.
$142 with free shipping from Amazon.
http://www.amazon.com/Optima-Batteries-8025-160-Starting-Battery/dp/B000MSBU9U