IMPORTANT NOTICE TO DX and APO/FPO HAMS: Beginning today, 16 May, I can no longer ship any Lithium cells outside the USA. It is no longer permitted to ship ANY Lithium cells via international mail, regardless of the quantity or packaging, due to international postal and air transport regulations. This will probably be the situation at least until 2013. I'm sorry for the inconvenience. It's a stupid, senseless decision made by a massive bureaucracy, but it's something we have to live with for now. Other shipment methods are simply not practical for small orders, so you will need to obtain the CR2032 cell locally.
Lithium coin cell, 20mm diameter x 3.2mm thick. Nominal 3V, nominal 220mAh capacity. Fresh, first-quality production from major manufacturers, not cheap knockoffs of dubious quality.
These are used in the PicoKeyer, but are also extremely common in all kinds of things. Check your car and Harley remotes, garage door openers, glucose meters, pocket calculators, LCD clocks, LED flashlights, PC motherboards and whatever else you have... why pay $2 each for these at the local store?
My normal stock will be either Panasonic, Sanyo or occasionally Eveready.