Chemical energy used in propelling cars.   Chemical energy used in storing and releasing electrical (battery) energy.   Mechanical energy used to make electrical power tâ¦o recharge the battery / batteries, and other systems.   Fluid power used to convert engine rpm to driveshaft rpm (in automatic transmissions).
OEM redirects here. For other uses, see OEM (disambiguation) . Original equipment manufacturer (OEM) is a term used when one company makes a part or subsystem that is used in another company's end product. The term is used in several ways each of which is clear in context.
1. The original definition: a company whose products are used as components in another company's product. The OEM will generally work closely with the company that sells the finished product (often called a value-added reseller or VAR) and customize the designs based on the VAR's needs.