Rayovac BR2032 3 volt, 235 mAh lithium coin cell - Used for memory retention in a wide variety of electronic devices including desktop computers. The device is 20 mm in diameter and 3.2 mm thick.
Important: As of January 1, 2009, lithium battery products formerly shipped under CFR 49 have been reclassified as "Dangerous Goods." Items listed as under UN 3090 DGR ("lithium metal battery") are shipped interstate within the US and internationally using IATA Packing Instruction 968. Click the "IATA DGR Notice" link on the right for more information.