The cost of materials for lithium iron phosphate (LFP) battery cells has jumped sevenfold since January 2020, while the cost for nickel cobalt manganese (NCM) cells has tripled, according to a new ...

But the LiFePO4 cells look like they’re pretty robust compared to their other lithium battery cousins, and the voltage profile only really varies from 3.4 V at 10% charge to 3.6V at 90% charge.