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. Since then, it has become the most popular battery technology for notebooks, cellphones and other handheld devices. In contrast to nickel-based batteries that require full discharges to keep the battery healthy, lithium ion batteries are better with frequent, shallow discharges before charging again. See lithium polymer
, lithium iron phosphate
High Performance Lithium Ion
Using a patented technology, Electrovaya's lithium ion batteries deliver 183 watt hours per kilogram (Wh/kg) compared to about 115 for standard lithium ion. These PowerPads (www.electrovaya.com) slip easily under a notebook computer and add up to 16 hours of extra running time when on the road.