What is a LiFePO4 Battery? LiFePO4 (Lithium Iron Phosphate) Batteries first appeared in the late 1990s, and as a new technology, it took a long time to be practical and affordable at the time. To increase the electrical conductivity of lithium iron phosphate compounds, they are mainly packed with carbon material. How is the chemical composition and is there any danger? LiFePO4 is a chemical that m...