Picked up this battery
Crazy 900 Cold Cranking Amps full battery management and ONLY 5 lbs!
Antigravity Batteries ATX20-HD Heavy Duty Lithium Ion Battery with Dual Polarity and Battery Management System (BMS) - 900 CCA 5.18 Pounds 30Ah - AG-ATX20-HD

FULL Battery Management System (BMS) to protect the battery from over-discharge and over-charge as well as having Thermal Protections. This makes for the safest and longest life-cycle possible.

LxWxH
6.9 x 3.4 x 5.1″