If you design a smart meter, a wireless IoT sensor, or a GPS tracker that must run on a single battery for a decade, the choice of cell matters more than any other component. The ER34615 Li-SOCl2 battery — a 3.6V, 19000mAh D-size primary lithium battery — is one of the most widely specified long-life cells for exactly this kind of mission-critical, low-power device.
What Is the ER34615 Li-SOCl2 Battery?
The ER34615 is a non-rechargeable (primary) lithium thionyl chloride (Li-SOCl2) cylindrical battery in the D size (34615 format, approximately 34 mm diameter * 61.5 mm height). It delivers a 3.6V nominal voltage and a high 19000mAh (19Ah) capacity, with a flat, stable discharge voltage across nearly its entire service life. With self-discharge below 1% per year and a shelf life of 10–15 years, it is engineered for devices that must sit dormant and then power reliably for a decade or more.
ER34615 Key Specifications
Why Li-SOCl2? The Chemistry Behind a 10–15 Year Service Life
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Ultra-low self-discharge (<1%/year). The ER34615 loses less than 1% of its charge each year in storage — a meter deployed in year one still holds most of its capacity in year ten.
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Ultra-high energy density. Li-SOCl2 offers one of the highest energy densities among primary chemistries, giving the ER34615 19000mAh in a compact D cell.
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Flat, stable 3.6V voltage plateau. The device draws consistent voltage for nearly the whole discharge, simplifying power-management design.
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Wide temperature range. Reliable in extreme cold and heat — unconditioned outdoor cabinets, oil fields, mining sites and remote locations.
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Built-in safety vent. A pressure-relief design supports safe operation under abuse conditions.
Where the ER34615 Battery Is Used
The ER34615’s decade-long service life makes it the default power choice for low-power, long-life devices:
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Smart utility meters — water, gas, heat and electricity meters (the classic application, built for years of unattended operation)
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IoT & wireless sensors — remote monitoring, NB-IoT / LoRa nodes and data acquisition
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GPS asset tracking — logistics containers, equipment and vehicle trackers
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Industrial instruments & automation equipment
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Security alarms & emergency positioning systems
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Oil-field, mining & outdoor field-work equipment
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Medical equipment & memory backup power supply
Why Choose Us as Your ER34615 Supplier?
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Factory-direct — primary lithium cells and custom packs, not trading-company markup
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OEM/ODM flexibility — customized terminals, solder pins, connectors, wire harnesses, labeling and packaging
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Flexible configurations — single cells or series/parallel packs tailored to your device’s voltage and current needs
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Quality-tested — long-life cells designed around your device’s target service life
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Sample & volume support — fast samples for prototyping and stable delivery for mass production
ER34615 Battery FAQ
Q: Is the ER34615 rechargeable?
A: No. It is a primary (non-rechargeable) Li-SOCl2 battery designed for long-life, single-service applications such as meters and sensors.
Q: How long does an ER34615 battery last?
A: With <1%/year self-discharge and a 10–15 year shelf life, the ER34615 is engineered for decade-long service. Actual runtime depends on your device’s current draw and duty cycle.
Q: What voltage and capacity does the ER34615 have?
A: 3.6V nominal voltage and 19000mAh (19Ah) capacity in a D-size cell.
Q: What devices use the ER34615?
A: Smart water/gas/heat/electricity meters, IoT wireless sensors, GPS asset trackers, industrial instruments, security alarms, oil-field and mining equipment, and memory backup.
Q: Do you supply ER34615 equivalents or custom packs?
A: Yes. We offer ER34615 cells and custom battery packs with tailored terminals, connectors and configurations. Contact us for the datasheet and samples.
Request a Datasheet & Samples
Looking for a reliable ER34615 / Li-SOCl2 battery supplier for your smart meter, sensor, or tracker project? Tell us your device’s voltage, current draw, and service-life target — our engineers will recommend the right cell or pack and send you a detailed datasheet and evaluation samples.
