The Antigravity Batteries AG-801 Lithium 8-Cell Motorsports battery is one of the most popular models. It is an extremely lightweight powerful battery in a small package.\
 
Small Case format
4.375 x 2.37 x 3.75 inches (LxWxH)
240 Cranking Amps
11 Amp Hours (Pb Eq)/ 5.5Ah (Actual)
1.56 lbs