A123 Systems competes in the Li-ion battery space with companies such as Advanced Battery Technologies ( ABAT), Altair Nanotechnologies ( ALTI), China Sun Group ( CSGH), Ener1 ( HEV), Hong Kong Highpower Technology ( HPJ), and Valence Technologies ( VLNC).
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A123 Systems, with its lithium-ion technology, also competes with advanced lead-acid battery (lead carbon) producers like Axion Power International ( AXPW.OB), C&D Technologies ( CHP), Enersys ( ENS) and Exide Technologies ( XIDE).

Let's not forget the NiMH (nickel metal hydride) battery. ECD Ovonics ( ENER) has licensed its battery technology to every major manufacturer of NiMH batteries, all 35 of them. It's a market projected to be $1.23 billion for HEVs in 2011 compared with a $320 million market for automotive Li-ion batteries.
Robert N. Castellano, Ph.D, is President of The Information Network, a leading consulting and market-research firm for the semiconductor, LCD, HDD and solar industries. Castellano is internationally recognized as one of the leading experts in these areas. He has nearly 25 years of expertise as an industry analyst. Castellano has provided insight on emerging technologies to many business and technical publications, including Business 2.0, BusinessWeek, The Economist, Forbes, Investor's Business Daily, Los Angeles Times Magazine, The New York Times, USA Today and The Wall Street Journal. He is a frequent speaker at conferences and corporate events. He has over 10 years' experience in the field of wafer fabrication at AT&T Bell Laboratories and Stanford University before founding The Information Network in 1985. He has been editor of the peer-reviewed Journal of Active and Passive Electronic Devices since 1985. He is author of the book "Technology Trends in VLSI Manufacturing," published by Gordon and Breach. His book "Solar Cell Processing" was published in 2009 by Old City Publishing. He received his Ph.D. in solid state chemistry from Oxford University.

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