Backup Battery: Capacity 120mAh, Diameter 20mm, Height 3.2mm

Q: How long does an RTC backup battery typically last?

Industrial-grade RTC backup batteries typically last 5-10 years depending on environmental conditions and usage patterns, with lithium chemistries offering the longest service life.

Q: Can backup batteries be replaced while equipment is running?

Yes, most industrial RTC modules are designed with hot-swappable battery compartments allowing replacement without interrupting main system operations.

Component Specifications

Definition

A secondary power source integrated into real-time clock (RTC) modules to maintain accurate timekeeping and preserve volatile memory data when primary system power is unavailable. This component ensures uninterrupted operation of time-sensitive functions in industrial equipment.

Working Principle

The backup battery supplies DC power to the RTC chip and associated memory when main power is disconnected. It utilizes electrochemical cells (typically lithium-based) that provide stable voltage output over extended periods, enabling the RTC to continue tracking time and date without interruption.

Materials

Lithium manganese dioxide (Li-MnO2) or lithium thionyl chloride (Li-SOCl2) chemistry; stainless steel casing; polypropylene or nylon insulation; nickel-plated brass contacts.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Height	3.2mm
Voltage	3.0V
Capacity	120mAh
Diameter	20mm
Terminal Type	SMD
Self Discharge Rate	<1% per year
Operating Temperature	-40°C to +85°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, IEC 60086-4, UL 1642

Parent Products

This component is used in the following industrial products

Real-Time Clock Module

A hardware component that provides precise timekeeping functionality for synchronization systems.

View Product Details

Engineering Analysis

Risks & Mitigation

Battery leakage causing circuit damage
Voltage drop below RTC operating threshold
Thermal runaway in high-temperature environments

FMEA Triads

Trigger: Extended storage without periodic charging
Failure: Complete battery discharge
Mitigation: Implement scheduled maintenance checks and battery rotation programs

Trigger: Exposure to temperatures beyond specified range
Failure: Reduced battery capacity and premature failure
Mitigation: Install temperature monitoring and environmental controls

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1V voltage stability over full discharge cycle

Test Method

IEC 61960 standard for secondary lithium cells

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Backup Battery

Manufacturer profiles associated with Backup Battery.

Sourcing Backup Battery from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Marking Ink

Specialized ink for permanent identification on surface mount resistors during manufacturing.

Dielectric Layer

Insulating layer in surface mount capacitors that stores electrical energy through polarization.

Optical Window

Transparent optical component for light transmission in polycarbonate lens housings

PCB Substrate

PCB substrate is the foundational insulating layer that provides mechanical support and electrical connectivity for electronic components in high-speed memory modules.

Frequently Asked Questions

How long does an RTC backup battery typically last?