Wein Cell MRB625 Mercury Free PX625 1.35v Replacement Battery ~ (OM1 etc)

Mercury free replacement 1.35v cell for cameras and light meters.   Will not kill the light meter in your OM1 like a 1.5v cell will!

Zinc-air chemistry gives stable voltage during life of cell
Lasts longer than equivalent hearing aid batteries due to reduced air flow
Battery activated by removing adhesive tab, giving long shelf life

Camera list here: http://camerapedia.wikia.com/wiki/PX625_cameras
Light Meter list: http://camerapedia.wikia.com/wiki/PX625_exposure_meters