[Blood of Tyrants]

Ultimately, the energy capacity of lithium iron phosphate is lower than that of other lithium-ion battery materials, making Ceder's advance of limited value

No, there are many applications where it could be used. Particularly in laser or magnetic rail gun weapons that need high amounts of energy for short bursts and then can recharge in several seconds from a traditional power source. They could also be used in conjunction with standard LI batteries in cars for quick acceleration.

[Dosa26]

Particularly in laser or magnetic rail gun weapons that need high amounts of energy for short bursts and then can recharge in several seconds from a traditional power source.

If they were set up in an array the short bursts could be as continuous and powerful as the hardware and power source could handle. Theoretically.