LiSOCl2 Batteries (3.6V)

LiSOCl2 batteries are 3.6V primary lithium cells built around lithium thionyl chloride chemistry. At category level, the line covers sizes from AAA through 1/2AA, 2/3AA, AA, A, C, CC and D up to 9V formats, with nominal capacity from 400 to 35,000 mAh, energy density up to 650 Wh/kg, shelf life of more than 10 years, self-discharge of less than 1 percent per year, and an operating temperature range from -60 to 85 degrees Celsius. Those are category-level figures; individual models have their own specifications, and this site lists them model by model rather than applying the category range to any single cell.

The combination of high energy density and very low self-discharge is why LiSOCl2 cells are used in devices that must run unattended for years: utility meters, IoT sensors, GPS trackers, security equipment and industrial instruments. A meter sealed into a housing, or a sensor installed in a remote location, cannot be serviced every year, so a cell that holds its charge for more than a decade in storage and service is the practical choice. The wide temperature range also matters for outdoor equipment that must work through winter cold and summer heat.

ER series models

• ER14250 — 1/2AA, 3.6V, 1,200 mAh
• ER14505 — AA, 3.6V, 2,400 mAh
• ER17505 — 3.6V, 3,400 mAh
• ER26500 — C, 3.6V, 8,500 mAh
• ER34615 — D, 3.6V, 19,000 mAh

Other ER models in the source catalogue include ER10450, ER14335, ER17335, ER18505 and ER9V. Model pages on this site cover the five models above in detail; capacity, size, standard current and pulse current for each are transcribed from the source specification table for that model only.

Certifications for this line

Certification names listed for the LiSOCl2 line are KC, UL, MSDS, CB, UN38.3, PSE and More. Certificates are available upon request. Certificate numbers are not published.

Custom packs built on ER cells

ER cells are also the building blocks of the primary lithium battery packs and hybrid pulse capacitor packs on this site. Packs combine cells in series and parallel structures to reach the voltage and capacity a device needs, and hybrid pulse capacitor packs add a capacitor for high-pulse loads. Pack voltage, capacity and structure are confirmed per order.