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A lithium-ion battery (or Li-Ion) is a battery that uses lithium cobalt dioxide (LiCoO2) or lithium manganese oxide (LiMn2O4) as a cathode/positive part and can also be a LiFePO4 battery.

A lithium-iron battery refers explicitly to a battery that is manufactured out of Lithium Iron Phosphate (LiFePO4) as the cathode material; the “Li” is for Lithium, the “Fe” is for Iron, and “PO4” stands for phosphate.

You could say that Lithium-iron is a member of the lithium-ion battery family, A Lithium iron battery is a lithium-ion battery as well, but not every lithium-ion battery is a Lithium Iron battery.

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