BYD could refer to:
BYD Co Ltd is a Chinese manufacturer of automobiles and rechargeable batteries with its corporate headquarters in Shenzhen. It has two major subsidiaries, BYD Automobile and BYD Electronic.
Hailed for its innovations, BYD has grown to become a major manufacturer of rechargeable batteries, most notably mobile phone batteries.
BYD topped the 2010 Bloomberg Businessweek Tech 100 list, a list of large, fast-growing tech companies.
The name BYD is an acronym derived from the phrase "build your dreams".
Founded in the February 1995 and listed on the Hong Kong Stock Exchange on July 31, 2002, BYD Co Ltd began as a rechargeable-battery factory competing in the Chinese market against Japanese imports.
BYD grew quickly; within ten years capturing more than half the world's mobile-phone battery market and becoming the largest Chinese manufacturer (and in the top four worldwide) of all types of rechargeable batteries. Replacing work done by machines with cheap, local labor lowered costs, and the company began expanding beyond batteries, adding automobiles and mobile phone components.