I bought this one... the Ballistic 8 Cell from these guys:
http://www.testsycl.com
The 8 Cell. Sorry no install photos yet.

Super lightweight. Cranks the bike over better too. Had it since January and as claimed no need for a charger to keep the voltage up.
They posted a pic of my bike in the project bike gallery.
Best of all I like the Ducati Red...