http://tinyurl.com/oh6w54u
RBC5 UPS Complete Replacement Battery Kit for APC SU450
Free Shipping 1-3 day delivery if ordered before 3pm EST
5.90in (length), 5.10in (width), 3.70in (height); 12.00lbs
18-Month Warranty, 60-Day Money Back Guarantee
Sealed AGM design makes batteries leak free.
RBC5 24V 7AH UPS Power Back Up Supply - Complete Battery Kit (includes wire harness)