Motobatt ML7U-HP LifePo4 Lithium Battery, Powersport Maintenance Free Replaces Yuasa YB7B-BS, YT7B4, Motobatt MB7U | Go Kart. ADVANCED SAFETY & RELIABILITY – Built with UL-certified Lithium Iron Phosphate (LiFePO4) cells, integrated protection PCB, and cell balancing for safe, dependable operation.