IMR = lithium manganese oxide cylindrical cell

M =manganese oxide cathode

R = round cell type

IMRs are also sometimes called “LiMn2O4” or “LMO” or “Li-Manganese”

INR = lithium iron phosphate cylindrical cell

I = lithium ion

N =nickel/manganese oxide cathode

R = round cell type

INRs are also sometimes called “LiNiMnCoO2” or “NMC”

Differences to note between ICR and IMR:

ICRs have a higher specific energy density than IMRs (higher mAh rating), but also a higher internal resistance and lower peak load current. They also suffer from a lower thermal runaway threshold than IMR at a full 4.2v charge (130–150C°C vs 170–180°C)