Installed my Antigravity 16-Cell battery after work today. It weighs 3.2 lbs vs. the stock 30+ lb battery. This thing is tiny but packs a punch! 480 CCA vs. the 500-600 CCA of the OEM battery at a fraction of the weight. The battery is so tiny that I had to use some foam risers underneath the battery, flip the mounting bracket upside down, and add a rally blue yoga block to stabilize everything.