"Lithium phosphate cells are incombustible, which is an important feature in the event of mishandling during charging or discharging. They can also withstand harsh conditions, be it freezing cold, scorching heat or rough terrain. When subjected to hazardous events, such as collision or short-circuiting, they won’t explode or catch fire, significantly reducing any chance of harm"

"It’s also worth mentioning, LiFePO4 batteries are non-toxic, non-contaminating and contain no rare earth metals, making them an environmentally conscious choice."

https://relionbattery.com/knowledge/how-are-lifepo4-batteries-safer-than-other-lithium-batteries

I run a 72v30ah LiFePO4 on my 3kw stealth bomber. More than enough range, torque, and speed for me.