Description

The 3.6V ER261020 Double C Size Primary Lithium (15000mAh) Battery provides dependable, non-rechargeable power for compatible industrial and electronic equipment requiring a 3.6V ER261020 lithium battery. This battery features lithium thionyl chloride (Li-SOCl2), bobbin, primary, non-rechargeable chemistry and delivers a nominal voltage of 3.6 volts with a capacity of 15000 mAh (15 Ah). Its Double C (CC) cylindrical format is designed for compatible utility meters, industrial monitoring equipment, telemetry systems, electronic instruments, memory backup circuits, security equipment, and other specialized devices requiring long-duration primary lithium power.

Designed in the ER261020 Double C battery format, this primary lithium battery measures 102.0 × 26.2 mm (4.02 × 1.03 in), length × diameter, and weighs 100.0 g (3.53 oz). The elongated cylindrical design is approximately twice the length of a standard C-size battery while retaining a similar diameter. Its lithium thionyl chloride (Li-SOCl2), bobbin, primary, non-rechargeable chemistry is particularly suitable for compatible low-current and intermittent-duty applications requiring a stable nominal voltage and extended operating periods. The 15000 mAh capacity provides a substantial energy reserve for properly designed equipment, although actual delivered capacity depends on discharge current, operating temperature, cutoff voltage, and application conditions.

The ER261020 3.6V Double C Lithium Battery is a primary, non-rechargeable battery and must never be placed in a battery charger. Although it resembles two C-size cells positioned end to end, it is a single 3.6V primary lithium cell and is not electrically equivalent to two conventional C batteries. It is not interchangeable with standard 1.5V C alkaline batteries, rechargeable NiMH cells, or other battery chemistries solely because they have similar physical dimensions. Lithium thionyl chloride batteries also have application-specific discharge characteristics, and equipment with high-current demands may require a different cell construction or an approved pulse-support arrangement. Always verify the equipment manufacturer's specified battery chemistry, nominal voltage, dimensions, terminal configuration, discharge requirements, and approved replacement specifications before installation. Each purchase includes one ER261020 3.6V 15000mAh Double C Primary Lithium Battery.

Specifications

Product Name:	3.6V ER261020 Double C Size Primary Lithium (15000mAh) Battery
Battery Model:	ER261020
Battery Size:	Double C (CC)
Battery Type:	Primary Cylindrical Lithium Battery
Chemistry:	Lithium thionyl chloride (Li-SOCl2), bobbin, primary, non-rechargeable
Voltage:	3.6 V nominal
Capacity:	15000 mAh (15 Ah)
Battery Format:	ER261020 Double C (CC) Cylindrical Cell
Cell Construction:	Primary Lithium Thionyl Chloride Cell
Dimensions:	102.0 × 26.2 mm (4.02 × 1.03 in), length × diameter
Weight:	100.0 g (3.53 oz)
Terminal:	Button top
Rechargeable:	No
Charging:	Do Not Recharge
Primary Applications:	Utility Meters, Industrial Monitoring, Telemetry Equipment, Electronic Instruments, Memory Backup, Security Systems, Tracking Equipment
Battery Quantity:	1 Battery
Packaging:	Single ER261020 3.6V Double C Primary Lithium Battery
Battery Charger Included:	No

Features

Key Features:

• ER261020 3.6 Volt Double C Primary Lithium Battery
• Battery model ER261020
• Double C (CC) cylindrical battery size
• 3.6-volt nominal output
• 15000 mAh (15 Ah) capacity
• Lithium thionyl chloride (Li-SOCl2), bobbin, primary, non-rechargeable chemistry
• Non-rechargeable primary lithium battery
• Single cylindrical cell construction
• Standard ER261020 Double C battery format
• Dimensions of 102.0 × 26.2 mm (4.02 × 1.03 in), length × diameter
• Battery weight of 100.0 g (3.53 oz)
• Button-top terminal configuration
• Elongated cylindrical design with a diameter similar to a standard C-size cell
• High-capacity lithium battery for compatible industrial applications
• Designed for compatible low-current electronic equipment
• Suitable for compatible long-duration standby applications
• Designed for compatible utility metering systems
• Useful for compatible electronic water meters
• Suitable for compatible electronic gas meters
• Designed for compatible electricity meters
• Useful for compatible heat metering equipment
• Suitable for compatible industrial monitoring systems
• Designed for compatible remote telemetry equipment
• Useful for compatible wireless data collection systems
• Suitable for compatible industrial sensor equipment
• Designed for compatible electronic monitoring instruments
• Useful for compatible memory backup circuits
• Suitable for compatible real-time clock backup systems
• Designed for compatible security alarm equipment
• Useful for compatible remote security sensors
• Suitable for compatible electronic tracking equipment
• Designed for compatible GPS tracking systems
• Useful for compatible environmental monitoring equipment
• Suitable for compatible data logging systems
• Designed for compatible remote communication equipment
• Useful for compatible industrial control systems
• Suitable for compatible specialized electronic equipment
• Primary lithium chemistry for equipment designed around 3.6V operation
• Designed for suitable low-current and intermittent-duty applications
• Actual delivered capacity depends on discharge conditions
• High-current applications require verification of the specific cell's discharge capability
• Some lithium thionyl chloride applications may require manufacturer-approved pulse-support circuitry
• Ready to use without charging
• Primary lithium chemistry eliminates the need for a battery charger
• Not rechargeable; do not place in a battery charger
• Not equivalent to two conventional C-size batteries connected together
• Not interchangeable with 1.5V C alkaline batteries
• Not automatically interchangeable with rechargeable C-size batteries
• Confirm equipment voltage and chemistry requirements before installation
• Verify the original battery's terminal configuration before replacement
• Confirm battery compartment dimensions before installation
• Do not substitute batteries with incompatible discharge characteristics
• Actual battery operating time depends on equipment power consumption and operating conditions
• Suitable for compatible industrial, metering, telemetry, monitoring, and backup power applications
• Supplied as one ER261020 3.6V 15000mAh Double C primary lithium battery

COMPATIBILITY

Common Applications:

• Compatible ER261020 Lithium Battery Devices
• Compatible 3.6V Double C Lithium Battery Equipment
• Compatible Industrial Utility Meters
• Compatible Electronic Water Meters
• Compatible Electronic Gas Meters
• Compatible Electricity Meters
• Compatible Heat Meters
• Compatible Smart Metering Equipment
• Compatible Remote Meter Reading Systems
• Compatible Industrial Monitoring Equipment
• Compatible Remote Telemetry Systems
• Compatible Wireless Data Collection Equipment
• Compatible Industrial Sensor Systems
• Compatible Environmental Monitoring Equipment
• Compatible Data Logging Equipment
• Compatible Electronic Memory Backup Systems
• Compatible Real-Time Clock Backup Circuits
• Compatible Security Alarm Equipment
• Compatible Wireless Security Sensors
• Compatible Electronic Tracking Equipment
• Compatible GPS Tracking Equipment
• Compatible Remote Communication Equipment
• Compatible Industrial Electronic Instruments
• Compatible Industrial Control Equipment
• Compatible Specialized Electronic Monitoring Devices
• Other Equipment Specifically Approved for 3.6V ER261020 Primary Lithium Thionyl Chloride Batteries

Also Known As / Replaces:

• ER261020
• ER-261020
• ER 261020
• ER261020 3.6V Lithium Battery
• ER261020 15000mAh Lithium Battery
• ER261020 15Ah Lithium Battery
• ER261020 Primary Lithium Battery
• ER261020 Lithium Thionyl Chloride Battery
• ER261020 Li-SOCl2 Battery
• ER261020 Double C Battery
• ER261020 CC Size Battery
• ER261020 Double C 3.6V Battery
• ER261020 CC 15000mAh Battery
• 3.6V Double C Lithium Battery
• 3.6 Volt Double C Primary Lithium Battery
• 3.6V CC Lithium Thionyl Chloride Battery
• CC Size 3.6V Primary Lithium Cell
• Double C 15Ah Lithium Battery
• Double C 15000mAh Lithium Battery
• ER261020 Industrial Lithium Battery
• ER261020 Utility Meter Battery
• ER261020 Telemetry Battery
• ER261020 Memory Backup Battery
• Other ER261020 Primary Lithium Cells with Matching Voltage, Chemistry, Dimensions, Terminal Configuration, and Discharge Specifications

Important Compatibility Note:

• BATTERY MODEL: ER261020.
• BATTERY SIZE: Double C (CC) cylindrical battery format.
• BATTERY TYPE: Primary cylindrical lithium battery.
• BATTERY CHEMISTRY: Lithium thionyl chloride (Li-SOCl2), bobbin, primary, non-rechargeable.
• VOLTAGE: 3.6 V nominal.
• CAPACITY: 15000 mAh (15 Ah).
• DIMENSIONS: 102.0 × 26.2 mm (4.02 × 1.03 in), length × diameter.
• WEIGHT: 100.0 g (3.53 oz).
• BATTERY FORMAT: ER261020 Double C (CC) cylindrical cell.
• TERMINAL: Button top.
• BATTERY QUANTITY: 1 battery.
• RECHARGEABLE: No. This is a primary lithium battery and is not designed to be recharged.
• CHARGING: Never attempt to recharge this battery.
• Do not place this battery in any rechargeable battery charger.
• DEVICE COMPATIBILITY: Use only in equipment approved for 3.6V ER261020 primary lithium thionyl chloride batteries.
• VOLTAGE COMPATIBILITY: Confirm that the equipment requires a nominal 3.6V primary lithium battery.
• BATTERY CHEMISTRY COMPATIBILITY: Confirm that the equipment manufacturer approves lithium thionyl chloride (Li-SOCl2) chemistry.
• DOUBLE C SIZE WARNING: The Double C designation refers to the physical battery format and does not mean the battery is made from two ordinary C-size cells.
• Do not substitute two conventional C batteries in place of an ER261020 unless the equipment manufacturer specifically approves that arrangement.
• C ALKALINE WARNING: Standard C-size alkaline batteries have a nominal voltage of 1.5V and are not direct replacements for this 3.6V lithium battery.
• NiMH WARNING: Rechargeable C-size NiMH batteries have a nominal voltage of 1.2V and different electrical characteristics.
• LITHIUM-ION WARNING: Rechargeable lithium-ion batteries have different charging and discharge requirements and must not be substituted unless specifically approved by the equipment manufacturer.
• Do not assume that batteries with similar dimensions or nominal voltages are electrically interchangeable.
• PHYSICAL COMPATIBILITY: Confirm that the battery fits the intended compartment and that the terminals make proper electrical contact.
• TERMINAL COMPATIBILITY: Match the original battery's terminal arrangement, contact style, and polarity.
• DISCHARGE COMPATIBILITY: Confirm that the specific ER261020 cell can safely supply the equipment's continuous and peak current requirements.
• HIGH-CURRENT WARNING: Lithium thionyl chloride cells intended for long-duration low-current applications may not be suitable for equipment requiring frequent high-current pulses.
• PULSE LOAD COMPATIBILITY: Some applications may require manufacturer-approved pulse-support circuitry or an alternative cell design.
• VOLTAGE DELAY: Some lithium thionyl chloride cells can exhibit temporary voltage delay after extended storage or low-current operation. Equipment design must account for the selected cell's discharge behavior.
• CAPACITY COMPATIBILITY: Actual delivered capacity depends on discharge current, operating temperature, cutoff voltage, and application conditions.
• BATTERY REPLACEMENT: Match the equipment manufacturer's specified battery chemistry, nominal voltage, capacity requirements, dimensions, terminal configuration, and discharge characteristics.
• Do not substitute batteries with different voltages, incompatible chemistries, or unsuitable discharge characteristics unless specifically approved by the equipment manufacturer.
• Do not mix primary lithium batteries with alkaline, zinc-carbon, rechargeable NiMH, lithium-ion, or other battery chemistries in the same equipment.
• When multiple batteries are required, use batteries of the same approved chemistry, compatible specifications, and similar condition.
• Do not mix new and used batteries in the same device.
• Replace all batteries in a multi-battery device together unless the equipment manufacturer specifies otherwise.
• Actual battery operating time depends on equipment power consumption, operating temperature, and application conditions.
• Always observe the correct positive (+) and negative (-) polarity during installation.
• Do not short-circuit the battery terminals or allow conductive objects to bridge the positive and negative contacts.
• Do not crush, puncture, disassemble, overheat, or expose the battery to fire.
• Do not attempt to solder directly to the battery terminals or casing.
• Use only manufacturer-approved battery tabs, leads, connectors, or assembly procedures where applicable.
• Do not use batteries that are damaged, leaking, deformed, or showing signs of excessive heat.
• Stop using the battery immediately if it becomes unusually hot, emits an unusual odor, or shows signs of damage.
• Keep batteries away from children and pets.
• Store unused batteries in a cool, dry location away from direct sunlight, excessive heat, and conductive metal objects.
• Remove batteries from equipment that will not be used for an extended period, following the equipment manufacturer's instructions.
• Protect battery terminals against accidental short circuits during storage and transportation.
• Dispose of or recycle used primary lithium batteries in accordance with applicable local regulations and available battery collection programs.

Package Includes:

• 1 × ER261020 3.6V Double C Primary Lithium Battery
• Capacity: 15000 mAh (15 Ah)
• Total Quantity: 1 Battery
• Primary Lithium Thionyl Chloride Battery — Non-Rechargeable
• Battery Charger Not Included