Home > Long-life paper-thin batteries from STMicroelectronics to power tomorrow’s Tiny Tech

Long-life paper-thin batteries from STMicroelectronics to power tomorrow’s Tiny Tech

Supplier News
article image ST’s EFL700A39 EnFilm battery

Limited production has begun of a new range of paper-thin rechargeable batteries from STMicroelectronics Pty Ltd .

STMicroelectronics’ new EnFilm advanced rechargeable batteries are less than 0.25mm thick, freeing designers from the constraints of standard battery sizes and offering a solution for powering the next generation of wearable technology and Internet-of-Things (IoT) devices.

Measuring 25.7mm x 25.7mm with a thickness of just 220µm, ST’s EFL700A39 EnFilm solid-state lithium thin-film battery is perfectly suited for use in ultra-low-profile devices. Surface-mount terminals allow direct attachment to the circuit board, simplifying assembly and eliminating wires and connectors. Optional tape-and-reel packaging allows high-speed automated placement.

Key features of ST’s EFL700A39 EnFilm batteries include 3.9V nominal voltage and 0.7mAh capacity; lithium technology recharging rapidly from a 4.2V charging circuit; low capacity loss; and long cycle life allowing 10 years of use if charged once per day.

The RoHS compliant and UL certified batteries satisfy UN tests and criteria for battery transportation, and meet IEC 62133 safety specifications, as well as the ISO7816/IEC10373 mechanical and flexibility standards for smart cards.

ST is ready to fulfil orders for engineering samples and small production quantities, targeting applications such as wireless sensor nodes, RFID tags, smart cards, wearable technology, non-implantable medical monitors, and back-up or storage for energy-harvesting devices. 

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