Vcell Power in China supplies high-performance ER18505 3.6V 4000mAh Primary Li SOCL2 Battery for high-energy industrial and long-term unattended IoT devices. Upgraded from the conventional AA-size ER14505 battery, this ER18505 model achieves a substantial capacity leap to 4000mAh with minimal size increase, featuring an ultra-high specific energy of 430Wh/kg and 1080Wh/L.
Vcell Power is a professional manufacturer and exporter of ER18505 3.6V 4000mAh Primary Li SOCL2 Battery in China, with over 20 years of focused industrial lithium battery R&D and precision production experience.
| Battery Type | Lithium Thionyl Chloride Battery |
| Brand | VCELL/OEM |
| Model | ER18505 |
| Nominal Voltage | 3.6V |
| Nominal Capacity | 4000mAh |
| Discharge Cut-Off Voltage | 2.0V |
| Maximum Continuous Discharge Current | 130mA |
| Peak Discharge Current | 180mA |
| Work Temperature | -60℃~+85℃ |
| Size(D*H) | 18.5*50.5mm |
| Weight | Approx.32g |
| Life Time | > 10 Years |




- Comes with 4000mAh large capacity, a nearly 100% capacity upgrade compared with 2400mAh standard ER14505 Li-SOCL2 battery
- Only slight size increase, effectively extending industrial device working cycle
- Greatly reduces on-site battery replacement frequency and later maintenance costs
- Supports 430Wh/kg mass specific energy and 1080Wh/L volume specific energy
- Achieves maximum power storage in limited compact cylindrical space
- Ideal for compact energy-intensive industrial intelligent equipment
Flat and Stable Voltage Output Performance
- Stable 3.67V open circuit voltage and constant 3.6V working voltage in full discharge cycle
- Ultra-flat discharge curve without sudden voltage drop or power attenuation
- Effectively protects precision instruments and avoids equipment failure or data loss
- Adopts professional airtight laser welding and glass-metal sealing technology
- Completely isolates internal electrolyte from external air and moisture
- Zero liquid leakage of ER18505 3.6V 4000mAh Primary Li SOCL2 Battery
and zero air permeability, durable and anti-aging
- Effectively protects expensive industrial mainboards and sensing modules
10+ Years Ultra-long Room Temperature Shelf Life
- Extremely low self-discharge rate with stable power reserve performance
- Guarantees more than 10 years valid storage life at room temperature
- Reduces long-term equipment operation and battery replacement costs
- Ultra-wide working temperature range: -60℃ to +85℃
- Stable discharge in extreme cold plateau and high-temperature desert environments
- Adapts to humid, dusty and harsh outdoor industrial working conditions
- Terminal Customization: Supports flat head, pin terminal, custom wire harness and dedicated connector terminals
- Assembly Customization: Compatible with single battery independent use or multi-cell series-parallel battery pack combination
- Structural Customization: Customizes special size and interface to match non-standard industrial equipment installation
- Brand OEM Service: Provides private label OEM/ODM processing to meet personalized brand demands
- Petroleum & Gas Industry: Long-term stable power supply for pipeline pressure monitoring, flow detection and safety early warning equipment
- Marine Monitoring Industry: Power support for offshore buoys, water quality sensors and unattended marine environmental detection devices
- Geological Monitoring Field: Applied to seismic monitors, geological disaster early warning sensors and crustal movement detection equipment
- Aerospace & Military Industry: High-reliability power solution for aerospace wireless electronic equipment and military portable monitoring devices
- High-end Industrial IoT: Suitable for heavy-load remote monitoring terminals, long-term standby sensing equipment and AMI/AMR automatic measurement systems
VCELL POWER has been a battery manufacturer since 2001 with 20+ years of experience in lithium battery production. We provide stable quality, certified products, and reliable global supply.
Exported to 80+ countries with IEC, CE, UN38.3, and UL certifications, we support OEM customization and long-term cooperation for global buyers.
If you are looking for high-reliability, long-endurance ER18505 3.6V 4000mAh Primary Li SOCL2 Battery for industrial and aerospace monitoring projects, welcome to contact Vcell Power for professional technical solutions, latest wholesale prices and free sample support.