FR03 and FR6: High‑Performance Lithium Iron Disulfide Batteries – A Reliable Alternative to Alkaline Batteries

With the new FR03 (AAA) and FR6 (AA) primary Batteries, Jauch introduces two high‑performance Lithium Iron(II) Disulfide Cells (Li/FeS₂) designed as a reliable alternative to conventional Alkaline Batteries. The new Cells combine high energy density with a stable voltage profile and are ideally suited for high‑drain applications in industrial environments, measurement technology, and mobile electronics.

The FR Cells (Lithium Iron Disulfide cylindrical cells) offer several key advantages over conventional LR Cells (Alkaline cylindrical cells) – including long operating life, extended shelf life, and reliable performance even under challenging environmental conditions. This makes them particularly well suited for devices with long service intervals or irregular usage patterns.

Optimized for Long‑Lasting and Reliable Applications

The FR03 and FR6 deliver a stable nominal voltage of 1.5 V and feature a flat discharge profile. Compared to alkaline‑manganese Batteries, the output voltage remains consistent even under load, ensuring reliable operation of sensitive electronic devices.
In addition, Li/FeS₂ Cells provide high performance under demanding environmental conditions. Low internal resistance enables high pulse currents, while the wide operating temperature range supports use in outdoor applications and industrial environments. Both cell types are designed for operating temperatures from –40 °C to +60 °C. 

Long Shelf Life and Verified Transport Safety

Thanks to optimized cell chemistry, the Batteries achieve a long Shelf Life combined with very low self‑discharge. For users, this translates into high planning reliability and reduced spare‑parts inventory.
In addition, the FR03 and FR6 meet the requirements of UN 38.3 transport testing and are therefore qualified for safe international shipping. 

Versatile Applications

Due to their combination of high energy density, low weight, and stable power output, the new Batteries are particularly well suited for: 

• Access Control and Security Systems
• Measurement and Test Equipment
• Cameras and Portable Electronics
• Outdoor and Tracking Devices
• Industrial and IoT Devices with Increased Energy Demand

As a higher‑performance replacement for AA and AAA Alkaline Batteries, FR Cells provide a reliable power supply over long periods of time, particularly in critical applications.

In addition, this technology offers a further advantage over Alkaline Cells: Alkaline Cells tend to leak once discharged, which is not typical for Li/FeS₂ Cells.

06/17/2026