[dn3500]

LR and CR cells don't contain mercury and never have. The original 12c battery was a MR44. 'L' is manganese alkaline, 'C' is lithium, 'M' is mercury.

[inejge]

All those cells have a zinc anode, which used to be amalgamated with a small amount of mercury to prevent corrosion and leakage[1]. (Mercuric oxide batteries certainly contain even more.)

[1] https://www.epa.gov/mercury/mercury-batteries