ER18505M A 3.6V
ER18505M 3.6V Lithium Thionyl Chloride Battery – Spiral-type, High Power, Reliable Performance
ER18505M 3.6V Lithium Thionyl Chloride Battery – Spiral-type, High Power, Reliable Performance
The SUNJ ER18505M is a high-power, A-size 3.6V lithium thionyl chloride (Li-SOCl₂) battery, engineered for demanding applications requiring robust pulse current and long-lasting, stable performance. Featuring advanced spiral-type construction, this non-rechargeable lithium primary battery delivers a nominal capacity of 3500mAh and an impressive energy density exceeding 450Wh/kg. With hermetic glass-to-metal sealing and a rugged stainless-steel casing, the ER18505M ensures exceptional leakage resistance and safety, even in harsh or challenging environments.
Designed to meet the needs of industrial and professional users, the ER18505M battery offers ultra-low self-discharge (less than 1% per year), superior passivation resistance, and reliable operation across a wide temperature range from -55℃ to +80℃. Compatible with popular models such as LS17500, XL-100F, ER17/50, and Bat-1125, it is the trusted choice for smart meters, IoT sensors, tracking systems, security devices, and scientific instruments.
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 | Spiral-type, stainless steel shell, fully sealed structure. |
| Nominal voltage | 3.6V | –– |
| Nominal capacity | 3500mAh | 5mA, 25±3℃，cut-off at 2.0V |
| Max continuous discharge current | 500mA | –– |
| Max available pulse current | 1000mA | –– |
| Operating temperature | -55℃~+80℃ | 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, 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
ER18505M Discharge Profiles (25°C) ↓
Voltage Recovery After Storage ↓
Voltage vs. Temperature curve ↓
Capacity vs.Current(2.0V cutoff) ↓
Key Features
● High and Stable Operating Voltage: Superior drain capability for high pulse and continuous discharge.
● Outstanding Energy Density: Over 450Wh/kg for extended device runtime.
● Ultra-Low Self-Discharge: Less than 1% per year at 25°C, ensuring long shelf life (over 10 years under normal conditions).
● Wide Temperature Range: Reliable performance from -55℃ to +80℃.
● Robust Construction: Stainless steel container, laser-welded can seal, and glass-to-metal hermetic seal for maximum safety and leakage protection.
● Non-Flammable Electrolyte: Enhanced safety and compliance with international transport regulations.
● Excellent Resistance: Withstands humid environments, low magnetic interference, and offers lower ESR for efficient energy delivery.
● Certified Quality: UL1642, IEC60086-4, UN38.3, and SGS certified for safety and reliability.
Typical Applications
● Utility & Smart Metering: Gas meters, water meters, and electricity meters.
● Security & Alarms: Alarms, security devices, and memory backup systems.
● Tracking & IoT: GPS trackers, remote sensors, and professional electronics.
● Medical Devices: Automatic external defibrillators (AEDs), portable medical equipment, and surgical power tools.
● Industrial & Military: Radio communications, transmitters, telematics (eCall), and pulse discharge applications.
● Lighting & Sensing: LED lighting, pressure gauges, flow meters, and environmental sensors.
Why Choose SUNJ ER18505M?
With over 20 years of expertise, SUNJ is a leading manufacturer of lithium thionyl chloride batteries, specializing in the Li-SOCl₂ series. Our batteries are engineered for safety, reliability, and performance, meeting the strictest international standards. Whether you need bulk orders or expert technical support, SUNJ delivers trusted power solutions with fast global shipping and competitive pricing.
Power your critical devices with confidence—choose the SUNJ ER18505M 3.6V lithium battery for unmatched reliability and performance. Contact us today for expert advice, bulk pricing, and fast 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
Looking for a dependable lithium thionyl chloride battery? The SUNJ ER18505M 3.6V battery is a top choice for professionals seeking high pulse current, long-lasting power, and exceptional safety. Compatible with ER18505, ER18505M, and other A-size lithium batteries, it’s ideal for smart meters, IoT sensors, security systems, and more. Discover the benefits of advanced Li-SOCl₂ technology and find the right battery solution for your needs at SUNJ.
