ER18505H A 3.6V
ER18505H 3.6V Lithium Thionyl Chloride Battery – High Energy, Long Life Power
ER18505H 3.6V Lithium Thionyl Chloride Battery – High Energy, Long Life Power
The SUNJ ER18505H is a high-energy, A-size 3.6V lithium thionyl chloride (Li-SOCl₂) battery, expertly engineered with bobbin-type construction for long-duration, low-drain applications. Delivering a nominal capacity of 4000mAh and an exceptional energy density of up to 700Wh/kg, the ER18505H stands out as one of the most reliable lithium primary batteries for devices requiring stable, long-term power.
With an ultra-low annual self-discharge rate of less than 1% at 25°C, this non-rechargeable battery ensures a shelf life of over 10 years under optimal conditions. Its robust stainless steel casing, advanced glass-to-metal hermetic seal, and non-flammable electrolyte guarantee safety and leakage resistance, even in challenging environments. Certified to UN38.3, UL, and CE standards, the ER18505H is trusted for global transport and mission-critical applications.
Compatible with popular models such as LS17500, XL-100F, ER17/50, and Bat-1125, the ER18505H is the ideal choice for smart meters, industrial automation, medical devices, and IoT systems.
All SUNJ batteries are designed to withstand reasonably foreseeable misuse and are tested in compliance with international performance, safety, and transport regulations.
Basic Parameters
| Subject | Parameters | Remark |
| Specification | A | Bobbin-type, stainless steel shell, fully sealed structure. |
| Nominal voltage | 3.6V | –– |
| Nominal capacity | 4000mAh | 2mA, 25±3℃，cut-off at 2.0V |
| Max continuous discharge current | 100mA | –– |
| Max available pulse current | 150mA | –– |
| Operating temperature | -55℃~+85℃ | Elevated operating temperatures can cause reduced pulse capacity and low voltage readings. For temperatures exceeding +40℃ or falling below -20℃, consult SUNJ. |
| Dimension | φ18.5x50.5mm | Figure attached |
| Standard weight | About 30g | –– |
| Annual self-discharge rate | ≤1% | 25±3℃，RH 65±10% |
Compatible Part Numbers
LS17500, XL-100F, ER17/50, SB-01A, Bat-1125, NSN 6135-01-524-7621, 10402768, T32/8AA, and others.
▎Note: Compatibility is based on voltage, dimensions, and performance. Please consult our technical support team for replacement or installation advice.
▎Storage Guidelines: Store in a clean, cool (preferably <20°C, not exceeding 30°C), dry, and well-ventilated environment.
Flexible Single Cell Solutions
SUNJ offers customizable battery configurations designed to match different applications and fit your device precisely.
◆ S: Standard Terminals
◆ P: Axial Pins
◆ T: Solder Tabs
◆ Custom Terminals: Available upon request
Warnings
● This is a non-rechargeable lithium battery. Do not charge.
● Keep away from heat, fire, flammable or explosive materials.
● Do not short-circuit, crush, disassemble, incinerate, or expose to temperatures above 100°C.
● Operate only within the recommended temperature range.
Electrical Performance Graph
ER18505H Discharge Profiles (25°C) ↓
Voltage Recovery After Storage ↓
Voltage and current relation curve ↓
Capacity vs.Current(2.0V cutoff) ↓
Key Features
● High Energy Density: Up to 700Wh/kg, enabling compact device design and extended operational life.
● Stable Operating Voltage: Consistent 3.6V output, ideal for low-drain, long-term applications.
● Ultra-Low Self-Discharge: Less than 1% per year at 25°C, ensuring over 10 years of reliable storage.
● Wide Temperature Range: Operates efficiently from -55°C to +85°C.
● Bobbin-Type Construction: Optimized for long-term, low current consumption.
● Robust Safety: Stainless steel container, laser-welded can seal, glass-to-metal hermetic seal, and non-flammable electrolyte.
● Excellent Passivation Resistance: Provides low magnetic interference, ensuring reliable performance even in sensitive electronic systems.
● Lower ESR (Equivalent Serial Resistance): Supports consistent power delivery and efficient discharge.
● Excellent Humidity Resistance: Designed to perform reliably even in humid conditions.
● Non-Restricted for Transport: Safe for global shipping, with full compliance to international transport regulations.
● Compliant with International Standards: Meets IEC86-4 safety requirements, with MSDS and UN38.3 certifications available.
Typical Applications
● Utility & Smart Metering: Gas meters, water meters, and electricity meters.
● Security & Alarms: Alarm systems, security devices, and memory backup.
● Tracking & IoT: GPS trackers, industrial sensors, and remote monitoring systems.
● Medical Devices: Automatic external defibrillators (AEDs), surgical tools, and portable medical equipment.
● Industrial & Military: Radio communications, transmitters, and telematics (eCall).
● Lighting & Sensing: LED lighting, environmental sensors, and professional electronics.
Why Choose SUNJ ER18505H?
With over 20 years of expertise, SUNJ is a leading manufacturer of lithium thionyl chloride batteries, specializing in the ER18505H series. Our batteries are designed for safety, reliability, and exceptional performance, meeting the highest international standards. Whether you need bulk orders or expert technical support, SUNJ delivers trustworthy power solutions, fast global shipping, and competitive pricing.
Choose the SUNJ ER18505H 3.6V lithium battery for your critical devices and experience unmatched energy, reliability, and longevity. Contact us today for expert advice, bulk pricing, and rapid worldwide delivery!
All Li-Socl2 Battery Specifications
| International Model Size | Max Dimension [mm] | Weight [g] | Nominal Voltage [V] | Nominal Capacity | Max Continuous Operating Current [mA] | Max Pulse Operating Current [mA] | |||
| Model No. | Size | End Voltage [V] | Nominal Current [mA] | Nominal Capacity[mAh] | |||||
| Bobbin Type | |||||||||
| ER10450H | AAA | Φ10.5*45.0 | 10 | 3.6 | 2.0 | 1.0 | 1000 | 20 | 50 |
| ER14250H | 1/2AA | Φ14.5*25.2 | 10 | 3.6 | 2.0 | 1.0 | 1200 | 20 | 50 |
| ER14335H | 2/3AA | Φ14.5*33.5 | 13 | 3.6 | 2.0 | 1.0 | 1650 | 40 | 100 |
| ER14505H | AA | Φ14.5*50.5 | 18 | 3.6 | 2.0 | 1.0 | 2700 | 50 | 100 |
| ER17335H | 2/3AA | Φ17.5*33.5 | 20 | 3.6 | 2.0 | 1.0 | 1900 | 50 | 100 |
| ER17505H | A | Φ17.5*50.5 | 24 | 3.6 | 2.0 | 2.0 | 3600 | 70 | 150 |
| ER18505H | ―― | Φ18.5*50.5 | 30 | 3.6 | 2.0 | 2.0 | 4000 | 100 | 150 |
| ER26500H | C | Φ26.2*50.0 | 53 | 3.6 | 2.0 | 2.0 | 8500 | 100 | 200 |
| ER34585H | ―― | Φ34.2*58.5 | 100 | 3.6 | 2.0 | 2.0 | 16000 | 150 | 300 |
| ER34615H | D | Φ34.2*61.5 | 103 | 3.6 | 2.0 | 2.0 | 19000 | 230 | 400 |
| ER261020H | CC | Φ26.2*102.0 | 100 | 3.6 | 2.0 | 2.0 | 17000 | 250 | 500 |
| ER341245H | DD | Φ34.2*124.5 | 200 | 3.6 | 2.0 | 5.0 | 36000 | 450 | 700 |
| ER9V | ―― | 17.0*26.5*48.5 | 34 | 10.8 | 6.0 | 1.0 | 1200 | 25 | 50 |
| Spiral Type | |||||||||
| ER14250M | 1/2AA | Φ14.5*25.5 | 10 | 3.6 | 2.0 | 2.0 | 800 | 100 | 200 |
| ER14335M | 2/3AA | Φ14.5*33.5 | 13 | 3.6 | 2.0 | 2.0 | 1350 | 200 | 600 |
| ER14505M | AA | Φ14.5*50.5 | 19 | 3.6 | 2.0 | 3.0 | 2100 | 400 | 1000 |
| ER17335M | 2/3A | Φ17.5*33.5 | 19 | 3.6 | 2.0 | 3.0 | 1700 | 400 | 1000 |
| ER17505M | A | Φ17.5*50.5 | 26 | 3.6 | 2.0 | 5.0 | 2800 | 400 | 1000 |
| ER18505M | ―― | Φ18.5*50.5 | 30 | 3.6 | 2.0 | 5.0 | 3500 | 500 | 1000 |
| ER26500M | C | Φ26.2*50.5 | 57 | 3.6 | 2.0 | 10 | 6000 | 1000 | 2000 |
| ER34615M | D | Φ34.2*61.5 | 109 | 3.6 | 2.0 | 15 | 13000 | 1800 | 3500 |
| ER9V | ―― | 17.0*26.5*48.5 | 34 | 10.8 | 6.0 | 1.0 | 1200 | 25 | 50 |
Selection Guidelines:
◆ High Current / Pulse Applications → Spiral-type Cells
◆ Long-Term, Low-Current Applications → Bobbin-type Cells
◆ Higher Capacity Needs → Larger Size Models
Flexible Battery Pack Solutions
For projects requiring higher voltage or capacity, battery packs can be customized by combining multiple cells.
Our battery pack solutions are designed for easy integration and tailored to specific voltage, capacity, and size requirements.
By connecting ER cells in series or parallel, we create custom battery packs optimized for performance and safety in device applications.
Pack Customization Includes:
◆ Series and parallel configurations
◆ Custom connectors and wiring harnesses
◆ Encapsulation, heat-shrink, or plastic casing options
◆ PCM/PCB protection circuits and safety components
◆ IP-rated waterproofing solutions available upon request
◆ Capacitors for voltage stabilization and pulse current support
Popular Searches
Searching for a dependable lithium thionyl chloride battery? The SUNJ ER18505H 3.6V battery is the preferred solution for professionals who need high energy density, long shelf life, and consistent performance. Compatible with ER18505, ER18505H, and other A-size lithium batteries, it’s perfect for smart meters, IoT devices, security systems, and industrial applications. Explore advanced Li-SOCl₂ technology and discover the right battery for your needs at SUNJ.
