Used this battery one time every at the track. It is pretty damn light and will save you some weight for tracking.

PC 625 Specs:

YB16-CLB replacement
625 cranking amps for 5 seconds
545 cranking amps for 10 seconds
480 cranking amps for 20 seconds
Short circuit current over 1800A
27 minute reserve capacity with 25amp load
Length 6.7"
Width 3.90"
Height 6.89"
Weight 13.2 lbs


Odyssey design:
Rugged Drycell sealed design
Military grade
Vibration resistant
60% more starting power
Deep discharge reserve power
2 year storage life
8-12 year design life

65 bucks takes it :)
http://www.odysseybatteries.com/battery/pc625lg_02.jpg