Repeating and adding to what turtlebits said:- Longer lasting (in both calendar life and charge cycle count) Safer - can tolerate higher temperature, does not

Repeating and adding to what turtlebits said:- Longer lasting (in both calendar life and charge cycle count) Safer - can tolerate higher temperature, does not catch fire if punctured (e.g. by a bullet) Cheaper Less toxic than 'legacy' lithium-ion (also known as NMC, nickel-manganese-cobalt, and NMCA, NMC + aluminum chemistries) Slightly more tolerant of abuse (overcharging and overdischarging). Less stored energy per pound/kilogram, by 20% - 30%, than 'legacy' Li-ion so perceived as less suitable for cars, although Tesla uses it in Model 3 except the long range version. Big manufacturer: CATL, a Chinese firm, who bought the key patents 20-odd years ago. Patents expire this year. LiFePO4 = lithium iron phosphate. Iron and phosphate are cheap and abundant compared to the nickel and cobalt used in 'legacy' lithium-ion batteries, and come with fewer "high horse" concerns (child labor, de-facto slavery in the Democratic Republic of the Congo's cobalt mines, environmental damage, nickel comes from Russia, etc.) (Fun fact: there's a lot more nickel in a 'lithium' battery than there is lithium.) As well as Li, Fe, and PO4, LFP also uses carbon nanotubes apparently. 1. https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery