This part is a kind of semiconductor called ICR18650D1.

Function of this product has Rechargeable Lithium Ion Battery.

Manufacturers : LG

Image and pinout :

Some of the text within the PDF file :

PRODUCT SPECIFICATION CONFIDENTIAL Prepared Document No. Date Rev LGC MED/BTC Approved Checked Lee, Kwan Soo LRB-PS-CY3000_D1_Rev 3 Description 2011-11-30 3 LGC MED/BTC Ryu, Duk Hyun Lithium Ion ICR18650 D1 3000mAh PRODUCT SPECIFICATION Rechargeable Lithium Ion Battery Model : ICR18650 D1 3000mAh 20 YOIDO-DONG YOUNGDUNGPO-GU, SEOUL 150-721, KOREA TEL : (82) 2-3773-1114 FAX : (82) 2-3773-7005 http://www.lgchem.com PRODUCT SPECIFICATION CONFIDENTIAL Description Date Rev Lithium Ion ICR18650 D1 3000mAh 2011-11-30 3 Revision History Revision 0 1 2 3 Date 2009-12-04 2010-03-18 2011-02-01 2011-11-30 Originator Lee, Kwan Soo Lee, Kwan Soo Lee, Kwan Soo Lee, Kwan Soo Description - Original Release - Cell Picture Updated - Bottom tubing was [ ... ]

ICR18650D1 PDF Datasheet Download