A rechargeable battery technology that offers advantages over lithium-ion. Sodium-ion batteries can be significantly less expensive because sodium (salt) is much more abundant and cheaper to extract ...

This stands for a type of rechargeable battery. They are much lighter than earlier battery types (NiCd and NiMH), have a long life cycle and generally don't suffer from the so-called "memory effect".

A rechargeable battery technology introduced in 1991 that provides greater charge per pound than nickel metal hydride. In 1993, Toshiba introduced the first notebook in the U.S. with a Li-ion battery.