Tadiran SL-850S Lithium battery 1/2 AA with 3.6 V and 1.2 Ah

The Tadiran SL-850S is a primary lithium thionyl chloride battery in an extremely compact size 1/2 AA. It was designed for professional electronic applications that require high energy density and reliable long-term performance in the smallest of spaces. With a nominal voltage of 3.6 V and a high capacity of 1.2 Ah, it is a proven energy solution for long-lasting, miniaturised devices. This model is the standard version for use in battery holders.

Highlights at a glance

• Compact design: High energy density in the miniaturised 1/2 AA size.
• High capacity: 1.2 Ah for a long and reliable operating time.
• High rated voltage: Stable voltage level of 3.6 V during almost the entire service life.
• Maximum reliability: Proven long-term stability and low self-discharge.
• Wide temperature range: Reliable operation from -55 °C to +85 °C.

Powerful in a wide range of applications

The Tadiran SL-850S was developed specifically for applications where miniaturisation and a long, maintenance-free service life are crucial. Its primary areas of use include memory backups (RTC, CMOS), security technology, industrial sensors, small medical devices and other professional electronics that rely on a long-lasting power source in a small design.

Designed for maximum safety and efficiency

The safety and longevity of the SL-850S are based on the proven Tadiran design. The cell has a hermetic glass-to-metal seal that reliably prevents the electrolyte from leaking. The inorganic electrolyte used is non-flammable and ensures a high degree of intrinsic safety. Each cell is designed to deliver its energy constantly and safely over a very long period of time, which minimises maintenance costs and reduces the total cost of ownership of your application.

Superior lithium thionyl chloride technology

Lithium thionyl chloride technology (Li-SOCl₂) is the gold standard for long-term applications with low power requirements. A characteristic feature is the passivation effect: a thin protective layer forms on the lithium anode, which reduces self-discharge to an absolute minimum and thus enables extremely long storage and operating life. This ensures that the energy is still reliably available even after many years.
 

Battery features

FAQs about this Tadiran battery

Does this model have solder terminals or wires?

No, the model SL-850S is the standard version with normal battery contacts and is intended for use in a suitable 1/2 AA battery holder. For direct installation, Tadiran also offers variants of this cell type with different solder connections.

For which applications is this battery type suitable?

This type of battery is ideal for miniaturised electronics that require an extremely long service life. Typical applications include compact wireless sensors, small medical devices, safety technology and memory retention in industrial control systems.

Is this battery rechargeable?

No, this is a primary lithium battery and must not be recharged under any circumstances. Attempting to charge the cell is dangerous and can lead to overheating, leakage or bursting of the cell.

What does the passivation effect mean for this battery?

After prolonged storage, a protective layer forms on the lithium surface. This layer is the reason for the extremely low self-discharge. At the first load, especially with higher currents, it can lead to a short voltage delay. This should be taken into account in the circuit design of the application.

What is the shelf life of the battery and how should it be stored?

The battery has a shelf life of over 10 years. For maximum shelf life, we recommend storing in a cool and dry place with low humidity.