This part is a kind of semiconductor called ICR18650-28A.

Function of this product has Lithium-ion Battery.

Manufacturers : Samsung

Image and pinout :

Some of the text within the PDF file :

-SAMSUNG SDI Confidential Proprietary – Spec. No. ICR18650-28A Version No. 1.0 SPECIFICATION OF PRODUCT 1. Customer 2. Product 3. SDI Model 4. Approval Division Signature Date : : Lithium-ion Battery for Note-PC : ICR18650-28A / / / / / / 5. Date of Application (YY/MM/DD) : 2008/12/01 6. Supplier : E SAMSUNG SDI Co., Ltd. nergy Business Division Development QA Issued Checked Approved Checked Approved Kwansic Chun JeongSoon Shin Kyeong Min Jeong Sujin Han Hyungsub Jeon 1 http:// -SAMSUNG SDI Confidential Proprietary – Spec. No. ICR18650-28A Version No. 1.0 History of Revisions Date (YY.MM.DD) 08.12.01 Rev. No Ver. 1.0 Initial Description Approved by QA Development Sujin han JeongSoon Shin Proposed by 2 -SAMSUNG SDI Confidential Proprietary [ ... ]

ICR18650-28A PDF Datasheet Download