Number – number of cells in the battery (omitted when the battery consists of 1 cell)

First letter – cell manufacturing technology: (none) – zinc-carbon (graphite)
A – zinc air
B – lithium carbon
C – lithium manganese
E – lithium thionyl
F – lithium-iron
H – rechargeable nickel-metal-hydride (NiMH rechargeable battery)
K – rechargeable nickel-cadmium (Ni-Cd rechargeable battery)
L – alkaline: zinc – manganese dioxide
M – rechargeable lithium (formerly: mercury cell)
P – alkaline-air
S – silver-zinc
Z – nickel-manganese (Ni-Mn)

Second letter – shape of the cell
R – cylindrical
F – plate
S – cuboidal