Produces thin, flat, lightweight sealed-lead batteries with performance comparable to nickel cadmium and nickel metal hydride batteries, primarily for use in portable computers, instruments and medical devices.

Planar Energy Devices was a company involved in solid state battery technology within the energy storage industry. The company developed lithium ion battery systems with applications in electronics and automotive sectors. Planar Energy Devices participated in advanced research programs and received awards for its innovations. It was founded in 2007 and is based in Orlando, Florida.

BrightVolt focuses on the development of advanced battery technology, operating within the energy and technology sectors. The company's main offerings include rechargeable solid-state batteries, which are used to power a variety of applications such as hybrid and electric vehicles, consumer electronics, medical and wearable devices, and other information technology products. BrightVolt primarily sells to the automotive, industrial, medical, wearable technology, and consumer products sectors. BrightVolt was formerly known as Solicore Inc. It was founded in 2001 and is based in Redmond, Washington.

Nexeon is a company that works on battery technology within the energy sector. It focuses on silicon anode technology that enhances lithium-ion batteries by replacing traditional graphite, aiming to increase energy density and reduce battery size and weight. Nexeon's innovations are applicable across various sectors, including electric vehicles, wearable devices, medical devices, consumer electronics, and energy storage systems. It was founded in 2006 and is based in Oxford, England.

Enfucell is a technology company focused on developing printed batteries for various industries. Its main product, the SoftBattery, is a disposable, thin, and flexible power source designed for devices like wireless sensors in healthcare, sports, and logistics. These batteries are tailored to specific applications and integrated into the devices they power. It was founded in 2002 and is based in Vantaa, Finland.

FlexEl is a green-tech company developing high performance, flexible power and flexible powered device applications. A technology spin-out from the University of Maryland, FlexEl works with partner companies to create, design, develop, license and/or manufacture flexible electronics and power management systems. FlexEl has developed custom BatteryCloth for applications including high performance, wearable electronics, remote sensing and transmission, military applications, and consumer product devices. FlexEl's core technologies (i.e., battery and energy harvesting technologies) emanate from the company's original work on high capacity power solutions for wireless sensor networks and active RFID tags.