The EVE ER18505 is a high-performance primary lithium thionyl chloride (Li-SOCl₂) cylindrical cell manufactured by EVE Energy Co., Ltd. Designed for demanding long-life applications, this battery delivers a stable 3.6V nominal voltage with 4000mAh capacity, making it one of the most reliable power sources for low-drain IoT and industrial devices.
Key Specifications
| Model | ER18505 |
| Chemistry | Lithium Thionyl Chloride (Li-SOCl₂) |
| Nominal Voltage | 3.6V |
| Nominal Capacity | 4000mAh |
| Dimensions | Ø18.7mm × 50.5mm (max) |
| Operating Temperature | -55°C to +85°C |
| Self-Discharge Rate | ≤1% per year |
| Shelf Life | Up to 10 years |
| Energy Density | Up to 680 Wh/kg |
| Certifications | CE, RoHS, UN38.3, IEC60086, UL, MSDS |
EVE Li-SOCl2 Battery Series Comparison
| Model | Capacity (mAh) | Voltage (V) | Max Continuous Current (mA) | Max Pulse Current (mA) | Weights (g) | Operation Temperature (°C) | Sizes (mm) |
|---|---|---|---|---|---|---|---|
| ER14250 | 1200 | 3.6 | 35 | 50 | 10 | -55~+85°C | 14.5×25.4 |
| ER14335 | 1650 | 3.6 | 35 | 75 | 12 | -55~+85°C | 14.5×33.5 |
| ER14505 | 2700 | 3.6 | 60 | 150 | 19 | -55~+85°C | 14.5×50.5 |
| ER17505 | 3600 | 3.6 | 100 | 180 | 26 | -55~+85°C | 17.5×51.0 |
| ER18505 | 4000 | 3.6 | 130 | 180 | 28 | -55~+85°C | 18.7×50.5 |
| ER26500 | 8500 | 3.6 | 150 | 200 | 52 | -55~+85°C | 26.2×50.0 |
| ER34615 | 19000 | 3.6 | 230 | 300 | 100 | -55~+85°C | 33.1×61.5 |
| EF651615 | 400 | 3.6 | 5 | 20 | 5 | -55~+85°C | 16.85×15.8×7.0 |
| EF651625 | 750 | 3.6 | 10 | 30 | 8 | -55~+85°C | 16.85×25.8×7.0 |
| ER2450T | 550 | 3.6 | 5 | 20 | 9 | -55~+125°C | 24.3×6.2 |
*Note: The above data comes from EVE’s laboratory.
Product Highlights
- High & Stable Voltage: Nominal voltage of 3.6V with an operating range of 3.3V–3.6V, remaining extremely stable throughout most of the battery’s service life.
- Exceptional Energy Density: Up to 680 Wh/kg — significantly higher than alkaline or standard lithium batteries — delivering more power in a compact form factor.
- Ultra-Low Self-Discharge: A self-discharge rate of ≤1% per year ensures the battery retains its charge during extended storage or standby periods.
- Wide Temperature Range: Operates reliably from -55°C to +85°C, suitable for harsh outdoor environments and industrial settings.
- Long Storage Life: Up to 10 years of shelf life under proper storage conditions (≤30°C, ≤60% relative humidity).
- Hermetic Glass-to-Metal Seal: Superior sealing prevents leakage and ensures long-term reliability in demanding environments.
- Certified & Compliant: Meets international standards including UN38.3, IEC60086, UL, CE, and RoHS.
Typical Applications
- Smart gas, water, electricity, and heat meters
- IoT sensors and wireless communication modules
- GPS trackers and asset tracking devices
- RFID systems and smart city infrastructure
- Security and alarm systems
- Industrial automation and PLC memory backup
- Outdoor monitoring equipment
- Medical and environmental sensors
Why Choose the EVE ER18505?
EVE Energy is a globally recognized manufacturer of primary and secondary lithium cells. The ER18505 is part of their trusted Li-SOCl₂ lineup, specifically engineered for applications where battery replacement is difficult or costly. With a decade-long service life and proven performance in smart metering deployments worldwide, the ER18505 is the professional’s choice for mission-critical low-power applications.
