This part is a kind of semiconductor called 3B880.

Function of this product has Low Rate Lithium Cell.

Manufacturers : Electrochem

Image and pinout :

Some of the text within the PDF file :

P/N: 3B880 QTC85 PC a division of Greatbatch Ltd. 9645 Wehrle Drive Clarence, NY 14031 Tel: (716) 759-5800 Fax: (716) 759-2562 www.electrochempower.com • Lithium / Thionyl Chloride Chemistry • Ideal for low rate and battery backup applications CELL SPECIFICATIONS: Open Circuit Voltage (25°C) . 3.6 V Rated Capacity . 1.0 Ah Rated Discharge Current ... 100 uA Maximum continuous current ... 1.0 mA Cell Diameter 25.4 mm (1.001 in.) Cell Height (excluding pins) .. 7.5 mm (0.297 in.) Cell Weight 10 g [ ... ]

3B880 PDF Datasheet Download