Samsung SDI[2] Co., Ltd. (Korean: 삼성SDI 주식회사) is a battery and electronic materials manufacturer headquartered in Yongin, Gyeonggi-do, South Korea.

Samsung SDI operates its business with Energy Solutions and Electronic Materials segment.

The Energy Solution segment manufactures rechargeable batteries used for IT device, automotive, and Energy Storage System (ESS) applications, and the Electronic Materials segment produces materials for semiconductors and displays.

[1][3] In the first half of 2022, Samsung SDI is ranked sixth in the world with a market share of 5 percent according to SNE research.

[5] In 2012, Samsung SDI and several other major companies were fined by the European Commission for price fixing of TV cathode-ray tubes.