ER26500H C 3.6V
ER26500H C-size 3.6V Lithium Battery – High Capacity, Bobbin-Structure, Ultra-Low Self-Discharge, Extended Operating Life.
ER26500H C-size 3.6V Lithium Battery – High Capacity, Bobbin-Structure, Ultra-Low Self-Discharge, Extended Operating Life.
The ER26500H is a high-capacity, bobbin-type lithium thionyl chloride (Li-SOCl₂) battery in a C-size 3.6V format. Engineered for low-drain, long-term applications, it provides a nominal capacity of 8,500mAh and achieves an ultra-high energy density of up to 700Wh/kg.
With an annual self-discharge rate of ≤1% and a shelf life exceeding 10 years, the ER26500H is ideal for devices requiring consistent, maintenance-free power. Its robust internal construction leverages the passivation effect for superior stability and efficiency.
Designed for extreme environmental conditions, the battery operates reliably from -55°C to +85°C. Its hermetic glass-to-metal sealing and stainless steel housing ensure leakproof safety in mission-critical systems like utility meters, environmental monitors, and industrial IoT equipment.
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 | C | Bobbin-type, stainless steel shell, fully sealed structure. |
| Nominal voltage | 3.6V | –– |
| Nominal capacity | 8500mAh | 2mA, 25±3℃，cut-off at 2.0V |
| Max continuous discharge current | 100mA | –– |
| Max available pulse current | 200mA | –– |
| 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 | φ26.2x50.0mm | Figure attached |
| Standard weight | About 53g | –– |
| Annual self-discharge rate | ≤1% | 25±3℃，RH 65±10% |
Compatible Part Numbers
LS26500, LS-26500C, LSH14, TL2200, TL-2200/S, TL5920, TL-4920, LTL-111A, SL-770, XL-140F, XL-145F, T52/41, T52/51, SB-C01, SB-C02, 15-5120-21500, PT-2200, 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
ER26500H Discharge Profiles (25℃) ↓
Voltage Recovery After Storage ↓
Voltage vs. Temperature curve ↓
Capacity vs.Current (2.0V cutoff) ↓
Key Features
● Ultra-High Energy Density: Up to 700Wh/kg, supports compact product design.
● Long Operating Life: 8,500mAh capacity, ideal for multi-year deployment.
● Stable Voltage Output: 3.6V nominal; open circuit voltage ≥3.65V.
● Bobbin-Type Construction: Optimized for low-drain and long-duration use.
● Low Self-Discharge: ≤1% per year at 25°C; shelf life of 8–10 years.
● Wide Temperature Range: Operates from -55°C to +85°C.
● Enhanced Safety: Hermetically sealed glass-to-metal design with non-flammable electrolyte.
● Global Transport Ready: Non-restricted for air, sea, and land shipments.
● Excellent passivation resistance
● Low magnetic signature
● Compatibility: Direct replacement for LS26500, TL2200, XL-140F, SB-C02, and others.
Application Fields
**Smart Sensing & IoT**
- Remote sensors, wireless nodes
- Smart meters (AMR/AMI), utility metering
**Environmental & Industrial Monitoring**
- Environmental data loggers, storage systems
- Industrial automation, control systems
**Medical & Professional Equipment**
- AEDs, surgical instruments, portable monitors
**Marine & Aerospace Systems**
- Marine buoys, GPS beacons
- Military-grade electronics and aerospace sensors
**Energy, Oil & Gas Applications**
- Pipeline monitoring tools
- Downhole drilling sensors and data transmission units
**Emergency & Telematics**
- Vehicle eCall systems
- Tracking and alarm devices
Power Your Critical Systems with the SUNJ ER26500H
Need a long-lasting, maintenance-free lithium battery for low-drain industrial or IoT applications? The SUNJ ER26500H delivers exceptional energy density, outstanding shelf life, and certified safety—all in a compact C-size package.Whether you're building metering systems, remote monitors, or field-deployed sensors, this battery ensures consistent performance even in extreme temperatures.Bulk pricing and expert technical support available. Contact SUNJ today for samples and OEM solutions.
FAQs
Q1: What makes ER26500H ideal for long-term applications?
A1: Its bobbin-type design enables ultra-high energy density (700Wh/kg) and an exceptionally low self-discharge rate (≤1% per year), making it perfect for low-drain, long-duration systems.
Q2: Can the ER26500H be recharged?
A2: No. It is a non-rechargeable (primary) lithium thionyl chloride battery.
Q3: What certifications does this battery hold?
A3: ER26500H is compliant with IEC60086-4, UL1642, UN38.3, MSDS, and RoHS.
Q4: What devices is ER26500H compatible with?
A4: It supports smart meters, medical equipment, GPS tracking units, and is compatible with LS26500, TL2200, XL-140F, and similar models.
Q5: How long can this battery be stored?
A5: The battery offers a shelf life of up to 10 years under 25°C conditions, with minimal capacity loss.
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 reliable ER26500, ER26500H, or C-size lithium thionyl chloride batteries? SUNJ offers high-capacity 3.6V Li-SOCl₂ batteries with ultra-low self-discharge and long shelf life—perfect for IoT, utility metering, and industrial applications. The ER26500H stands out with bobbin construction, wide operating temperature range, and global transport compliance. Whether you need lithium primary batteries, C-size lithium cells, or custom Li-SOCl₂ power solutions, SUNJ delivers globally with expert support.
