This is a third-party (copy) version of the Tadiran TL-5903 AA-size 3.6V lithium-thionyl chloride (Li-SOCl₂) battery. It mimics the form and general specifications of the original Tadiran cells and is commonly used in low-power, long-life embedded systems such as metering devices, security systems, memory backup, and industrial electronics.
While it may not fully match the original Tadiran’s lifespan and consistency, it offers a cost-effective solution for non-critical or temporary use where exacting performance isn't required.
Features:
Cost-effective alternative to original TL-5903
High energy density for its size
Long shelf life (shorter than original, approx. 5–7 years)
Wide operating temperature range
Suitable for memory backup, low-power devices, and RTC modules
Lightweight and compact with AA-size compatibility