Zürich, Switzerland – BTRY today announces the BTRY 1S4P, the world’s first ultra-thin, integrated battery designed specifically for smart cards. The groundbreaking BTRY 1S4P battery will enable smart cards to function independently, opening unprecedented use cases in identification, logistics, and secure transactions.
Unlocking the next generation of smart cards: active digital identification and dynamic data storage
Smart cards and logistics labels are becoming increasingly intelligent, offering functions beyond simple identification. Until now, smart cards have relied on external power sources, such as card readers, limiting crucial advanced functionality. The following use cases of BTRY 1S4P are well tested, pending an adequate rechargeable power source:
- E-Ink Displays – Dynamic visual information can be updated directly on the card.
- Biometric Authentication – Fingerprint sensors for secure identification.
- Onboard Data Storage – Smart cards can now store critical information such as temperature logs, during shipping.
- Location Tracking – GPS-enabled smart cards for real-time logistics monitoring.
“The only thing holding back the widespread adoption of such a solution in a card format is the battery.” – Charles Bourbonnais, CEO of Hive-Zox
The thinnest battery on the market
BTRY 1S4P is thinner than the packaging of existing batteries, making it the thinnest battery available today. It is an all-solid-state secondary battery, primarily suitable for reusable cards. The dimensions and specifications have been defined in close collaboration with manufacturers to perfectly fit their needs—providing a powerful, ultra-thin power source that was previously unavailable.
BTRY 1S4P stands for 1x serial 4x parallel cells and will boast unprecedented specifications:
- Thickness: Less than 0.1 mm (5 times thinner than any other battery)
- Area: 4×5 cm
- Capacity: Up to 50 mAh
- Operational Reliability: -40 to +150 degrees Celsius
- Cycle life: >1000

The battery moment is now for smart and remote applications
The BTRY 1SP4 showcases the unique qualities of BTRY’s patented technology as a thin, powerful, and reliable high-end battery. As innovative smart card manufacturers test the BTRY 1S4P, multiple prototypes of BTRY in different form factors are evaluated in the MedTech and wearable consumer electronics industries. The pilot production capabilities in Europe are being developed alongside customer adoption and the maturity of new applications. BTRY is now inviting early adopters to get in touch for collaborations and participate in PoC projects to explore the full potential of BTRY in their applications.
About BTRY
BTRY, a Swiss battery start-up and spin-off from Empa and ETH Zurich is redefining energy storage with its customizable Li-ion solid-state battery. Our innovation takes shape in an energy-dense solid-state battery that charges in just one minute. This breakthrough combination is set to power the next generation of IoT, MedTech, consumer electronics, and other demanding applications yet to be discovered. The production scalability is guaranteed by using established semiconductor technology and can be realized within Europe, complying with EU regulations.
Forward Looking Statement:
This press release contains certain forward-looking statements relating to BTRY’s business, which can be identified by terminology such as “strategic”, “proposes”, “to introduce”, “will”, “planned”, “expected”, “commitment”, “expects”, “set”, “preparing”, “plans”, “estimates”, “aims”, “would”, “potential”, “awaiting”, “estimated”, “proposal”, or similar expressions, or by expressed or implied discussions regarding the ramp up of BTRY’s production capacity, potential applications for existing products, or regarding potential future revenues from any such products, or potential future sales or earnings of BTRY or any of its business units. You should not place undue reliance on these statements. Such forward-looking statements reflect the current views of BTRY regarding future events, and involve known and unknown risks, uncertainties and other factors that may cause actual results to be materially different from any future results, performance or achievements expressed or implied by such statements. There can be no guarantee that BTRY’s products will achieve any particular revenue levels. Nor can there be any guarantee that BTRY, or any of the business units, will achieve any particular financial results.