May 23, 2019: Tesla, the US electric car company, has finalized its purchase of supercapacitor maker Maxwell Technologies, it announced on May 16.

Headquartered in California, US, Maxwell develops ultracapacitors and supercapacitors for automotive, heavy transportation, renewable energy and other energy storage applications.

The definitive agreement to buy Maxwell was made in February, when industry sources estimated the sale price was $218 million.