Codes for primary batteries according to IEC

Code

System

Open circuit voltage

R

Zinc-manganese-dioxide

1.5 V

LR

Zinc-alkali-manganese

1.5 V

MR

Zinc-mercury-oxide

1.35 V

NR

Zinc-manganese-mercury-oxide

1.4 V

SR

Zinc-Silver-oxide

1.55 V

CR

Lithium-Mangandioxid

3.0 V

BR

Lithium- Polycarbon-Monofluide

3.0 V