I want a Deka battery for my '02 XX. The local Batteries Plus store has an X2 Xtreme battery that the salesmen says he's 90% sure is made by East Penn./Deka. Anyone know for sure?

The X2 Xtreme is a 12 AH 200 CCA version at about $85 after getting 10% off. If its the same as a Deka, I believe its 5/8" taller than the OEM battery and the Deka ETX12 10 AH 180 CCA battery. Overall dimensions of the Deka ETX14 are 5-7/8" X 3-7/16" X 5-3/4".

Thanks for your help!

I recently took on the Deka line in my warehouses. I will follow up on your question and post up tomorrow.
You can easily upgrade to the size 14 battery by simply removing the rubber spacers below the factory battery. It is an easy and cheap upgrade.
This is the battery that you want and it is made in the USA:
http://www.eastpenn-deka.com/assets/base/0278.pdf

Just saw a group buy on pashnit.com :

http://www.pashnit.com/product/motobatt.html

It's an AGM battery, $80 shipped, and rated for 14 Ah.

The Batteries Plus guy confirmed their Xtreme batteries were made for them by East Penn/Deka. He said HD batteries are East Penn/Deka's as well (There's even a picture of a V-Rod on my battery box). I bought the X2-14 for around $91 incl. tax and it fit after taking out the rubber baby buggy bumpers in the bottom of the tray. I did have to put the two weird-shaped washers under the cable connectors in order to fasten them down to the X2-14's terminals since the connectors wouldn't sit flush on them. I HOPE that's what the weird-shaped washers were for.