The Ramway ER34615 is a high-capacity 3.6V lithium-thionyl chloride (Li-SOCl₂) battery in a standard D-size cylindrical format. It is designed to deliver long-term, stable power for use in low to medium-drain applications requiring extended service life. With an exceptionally high energy density, wide operating temperature range, and ultra-low self-discharge, this battery is ideal for utility metering, tracking systems, security equipment, industrial control systems, and IoT devices where reliability is critical.