Further Interstate Battery info for future reference:
The U2200 6 volt deep cycle battery, can be bought locally for $116.95 at some Interstate dealers.
Sam's Club sells the PFGC2 battery which is identical to the U2200, according to the Interstate Distributor.
Considerably less money!!
$61.48
As stated in an earlier post, you can tell the date of manufacture by looking on the top of one of the posts will be a number and a letter. The number will be the year and the letter will be A (Jan.) thru L (Dec.); thus 5G would be July 2005.
Interstate also makes a U2300 and U2400 which are heavier duty but are the same physical dimensions, which would be of value to those who do a lot of dry camping. Could not find any locally and have no idea of the cost.
Here is a link to the specs on the 6 volt batteries:
http://www.interstatebatteries.com/w...duct_6volt.asp
Hope this saves someone some $$.