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City Labs, Inc., a Florida corporation designs, develops, and manufactures tritium betavoltaic batteries for microelectronics, sensors, and other devices commonly used in aerospace/defense, medical implants, and industrial markets. City Labs has a regulatory-licensed R&D/manufacturing facility located in Miami, Florida.


City Labs, Inc. was founded in April 2005 by two Miami entrepreneurs with one single overriding passion of creating a high-tech company in South Florida. Dr. Peter Cabauy and Mr. Denset Serralta led a team of scientists and engineers from national laboratories and universities to create the first commercially available tritium battery.

The City Labs battery supplies continuous low power for a period of over 20 years for microelectronics, sensors, actuators, and other devices commonly used in defense, homeland security, commercial, and medical industries. City Labs’ first prototypes for the NanoTritium™ battery were developed in December 2008 and were provided to Lockheed-Martin for thermal, vibration, and pressure testing. These battery units produced nanowatt level power and were subjected to extreme temperature testing by Lockheed Martin of -55°C to +150°C without diminution of its operational capabilities. These batteries are still in operation today at City Labs’ facility. In October 2010, City Labs achieved the industry’s first and only General License for distribution of its tritium betavoltaic batteries providing end-users with the ability to purchase and receive the tritium betavoltaic batteries without the need for a radiation license or radiation training. Purchasers of City Labs’ betavoltaic batteries become de-facto general licensees upon receipt of batteries. Today, City Labs is breaking ground with the scale-up of its betavoltaic batteries to the 100-microwatt range allowing for expanded range applications in unattended sensors, medical implants, and microelectronics.

Company Financial Conflict of Interest Policy

Corporate Team


Peter Cabauy, PhD
Chief Executive Officer

Dr. Cabauy is co-founder, Chief Executive Officer of City Labs, Inc. In 2002, he received his Ph.D. from the University of Michigan in Applied Physics. His thesis work was in Quantum Information Physics at Argonne National Laboratories (ANL), and he co-authored a publication with his thesis advisor, Dr. Paul Benioff, a seminal pioneer in the field of Quantum Computing.

In 2003, he founded and directed the Office of Entrepreneurial Science at Florida International University advising in intellectual property matters, and laying the groundwork for its technology incubator program.  In 2005, Dr. Cabauy co-founded City Labs where his diverse experience in technology entrepreneurship, experimental and theoretical physics has been instrumental in both structuring the company and developing its product line. Under his leadership, the company completed a Series A investment round in 2010, commercialized its signature betavoltaic product line in 2012 and has successfully navigated the complex regulatory landscape achieving the world’s first general license for a betavoltaic product.

As of 2017 City Labs has achieved a strong patent portfolio under Cabauy’s leadership and is introducing a new class of betavoltaics that will expand its commercial reach into medical implants, wireless sensors and space satellite applications. In addition to his duties at City Labs, Dr. Cabauy serves on the board of FIU’s University Research Foundation since 2013.


Denset Serralta, MSEE
Chief Technology Officer

Denset Serralta co-founded City Labs, Inc. in 2005, after 27 years of professional experience in the embedded hardware/software design field.

Since 1984, he has worked as a consultant for various defense, biotech and aerospace firms. His work includes compliance with military and other government standards and he holds Six-Sigma certifications at client sites.

Mr. Serralta’s areas of concentration lie within the development of military, aerospace, and biotech systems. His specific skills sets include the utilization of Digital Signal Processing (DSP) and Object Oriented Design in various computer languages, several Real Time Operating Systems (e.g. vxWorks, Solaris, VDK), and various hardware platforms.

Mr. Serralta has also assisted companies with analysis for the selection and integration of Commercial-Off-the-Shelf (COTS) components for development and production phases, as well as for sensor applications including radar, sonar, and communications & control DSP, network hardware/software, avionics, and biotechnology.


Gerald Duty, JD PL

Gerald Duty, JD PL is a Co-founder, general counsel, and an attorney in Miami.  His practice is focused on international business transactions, specifically the negotiating and structuring of cross-border business endeavors, including joint ventures, mergers and acquisitions, foreign investment distribution and other contractual matters in industries such as banking, technology, entertainment, international trade and media.

Gerald has substantial experience representing clients throughout Latin America and Spain.  Prior to forming his current firm, Duty PL, Gerald practiced with the Miami office of a large international law firm.

He graduated from the University of Miami with degrees in law, international relations and political science.

Scientists and Engineers


Jesse Grant
Mechanical & Design Engineer

Jesse Grant holds a BSME (2012) from Florida International University (FIU) and joined City Labs’ Staff in 2010. Mr. Grant currently serves as City Labs’ Mechanical and Design Engineer. He has background in various aspects of mechanical design with an emphasis on electronics packaging and various aspects of materials. Additionally,

Mr. Grant has a strong foundation in materials science and offers up expertise in 3D modeling, design, simulation, manufacturing and materials preparation. Mr. Grant has experience in photolithography and mask design as well as various elements of semiconductor wafer production and processing.  Mr. Grant also provides IT / computer network support for City Labs.

There are no foreign nationals in the list of key personnel responsible for efforts of the project described herein; all participants are citizens of the United States of America.

Consultants and Advisors


Bret Elkind PhD

Dr. Elkind is one of City Labs’ top advisors. Until recently he served as the Senior Scientist and Radiation Safety Officer for City Labs, Inc., providing support over a broad range of areas including research and development, materials science/characterization, laboratory facilities and processing, regulatory guidance, radiation safety, and quality control. Prior to joining City Labs, Dr. Elkind served as Chief Scientist and Radiation Safety Officer for The Protective Group—an armor manufacturer for the U.S. Army.

Dr. Elkind’s diverse technical background includes Nondestructive Evaluation [UT, XRD, optical, radiography], Environmental Scanning Electron Microscopy, mechanical testing, microstructural analysis, failure analysis, and ballistic testing. His career history spans commercial, government, academic, and start-up endeavors including armor design and manufacturing, Anti-Submarine Warfare systems analysis, structural engineering, construction materials testing, oceanographic sciences, and medical devices.

Dr. Elkind earned his BES, MSE, and Ph.D. degrees in Materials Science and Metallurgical Engineering from The Johns Hopkins University in Baltimore, Maryland, where he was also a Post-Doctoral Research Associate and member of the Alpha Sigma Mu Materials Science Honors Society.

Richard Bulman

Richard C. Bulman, Jr., Esq
Corporate Counsel

Richard C. Bulman serves as Corporate Counsel for City Labs.

Mr. Bulman has counseled emerging, growth and Fortune 500 companies with global operations within the computer, electronic commerce, financial services, life sciences, information and media technology, specialty manufacturing and telecommunications industries.

He has served in executive and legal positions with such organizations as Kirkpatrick & Lockhart (now K&L/Gates), AkermanSenterfitt, American Lawyer Media, LLC, Diversified Communications Industries, Ltd. and the State of New York. Mr. Bulman holds a B.A. from the Rockefeller College of Public Affairs and Policy at The University at Albany and a J.D. from the Faculty of Law and Jurisprudence at the State University of New York at Buffalo.

Jerry BW

Gerard S. Coombs, MScT
Financial Management and Advisor

Gerald S. Coombs is currently a financial management advisor for City Labs.

He advises the Corporation on accounting and financial functions including tax, external audit, risk management, and HR functions.

Mr. Coombs has been involved in the organization of a number of start-up technology companies and has conducted the initial public offering and/or sale of these companies, including Fuse Biosciences, Concordia Pharmaceuticals, Inc., Verid, Inc., SANO Corporation, IVAX Corporation and Corvita.

Mr. Coombs is a graduate of the University of Miami.


Walt Cofer, MS, CET

Walt Cofer is the Regulatory / Radiation Safety Consultant for City Labs and the president of Radiation Control, Inc., a radiation safety consulting firm based in Tallahassee, Florida that specializes in industrial radiation applications.

He started out in the private sector as an industrial radiographer/radiation safety officer, then spent 16 years as an industrial health physics specialist/regulator at the Florida Bureau of Radiation Control.  In 2004, he returned to the private sector to provide radiation safety training and consulting services to government, education and commercial clients.

He has also consulted for the International Atomic Energy Agency, the National Nuclear Security Admin., and the World Institute for Nuclear Security.  He is a certified industrial radiographer, certified DOT/hazmat specialist, and a certified trainer.

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