For the same vehicle range, an LFP battery can come out heavier than its nickel-rich rivals — and engineers keep picking it anyway.
Lithium iron phosphate gives up energy density and gets back everything else. No nickel, no cobalt, cells that shrug off repeated charging, and a chemistry that resists thermal runaway.
A grid battery and a long-range vehicle want different compromises. That is why the spec that looks worse is sometimes the 1 built to last.