仲有金色 (最常見)


本帖最後由 RichardGary 於 2010-11-16 16:34 編輯

green: no mercury
black: with mercury content about 0.2-0.7% by weight.

Liquid mercury will move and cover the impurities (active metals: Iron, Copper,...) inside the chemicals (MnO2) of the battery, preventing the active metals to have reaction with the battery chemical, to protect the battery capacity.

For Green type battery, manufacturer use "more pure" chemical MnO2 (more expensive), so mercury is not required.

Beware that almost all button cells for watches or tamaqachi do have mercury content. DO NOT touch any leakage button cells, e.g. LR44, LR41, SR626....
Lithium coin cells e.g.  CR2032, CR2016,... do not have mercury content.