Public Resources Code § 15020

No person shall sell any dry cell battery manufactured on and after January 1, 1994, for household use in which the mercury content, by weight, exceeds the following limits:

(a) In an alkaline battery, 0.025 percent.

(b) In a carbon-zinc battery, 0.0 percent intentionally introduced mercury, as distinguished from mercury which may be incidentally present in other materials.