CR1130 Battery Specification Manual: Voltage, Internal Resistance, Pulse Current & Cross Reference Replacement Chart

This specification manual systematically sorts out the core electrical parameters of the CR1130 lithium manganese primary coin cell, covering static voltage indicators, internal resistance characteristics, pulse discharge performance, as well as a complete compatible replacement model comparison table. It serves as a reliable reference for electronic engineers, purchasing personnel, quality inspectors and product designers during circuit design, component selection, incoming inspection and battery replacement maintenance.

1. Fundamental Dimension & Basic Electrical Specifications

CR1130 is a 3.0 V non-rechargeable lithium manganese dioxide coin cell. The naming rule is defined as: CR = Lithium manganese primary battery; 11 = nominal diameter 11.0 mm; 30 = nominal thickness 3.0 mm.

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2. Voltage Performance Analysis

2.1 Open-circuit Voltage & Load Voltage

• Fresh CR1130 cells typically show an open-circuit voltage between 3.10 V ~ 3.25 V, which gradually declines as power is consumed.

• Under light continuous load (0.1 mA–1 mA), the working voltage remains stable around 2.9 V–3.0 V for most of the discharge cycle, presenting a flat discharge curve without steep voltage drop, which is critical for precision chips, memory backup circuits and low-power sensors.

• When the terminal voltage drops close to 2.0 V, the battery reaches the depletion state and can no longer support normal equipment operation.

2.2 Voltage Deviation Influencing Factors

1. Ambient temperature: Low temperature will slightly reduce instantaneous load voltage; high temperature accelerates voltage decay during long-term discharge.

2. Residual capacity: Lower remaining capacity leads to lower static open-circuit voltage.

3. Internal resistance consistency: Products from different manufacturers have tiny voltage differences under identical loads due to internal resistance gaps.

3. Internal Resistance Index & Interpretation

Internal resistance is a key indicator reflecting battery response speed and load capacity, defined as equivalent AC impedance tested under fixed frequency.

• Typical AC internal resistance of new CR1130: 800 Ω ~ 1500 Ω (1 kHz test frequency)

• Internal resistance variation rule:

  1. Brand-new qualified cells maintain low internal resistance; as discharge proceeds, internal resistance rises gradually.

  2. High temperature and long-term aging storage will increase internal resistance obviously.

  3. Excessively high internal resistance will cause severe voltage sag during current output, failing pulse transmission of remote control, RFID and wireless trigger modules.

Application Guidance

• For high-sensitivity pulse signal circuits: Select batches with low internal resistance consistency;

• For static CMOS backup power with nearly zero current drain: Internal resistance has negligible influence on service life.

4. Continuous Discharge & Pulse Current Capability

4.1 Recommended Continuous Discharge Current

The optimal working current range for CR1130 is 0.1 mA ~ 1 mA. Long-term discharge exceeding 2 mA will result in significantly reduced effective capacity, premature voltage drop and shortened service life.

4.2 Pulse Current Performance

Many devices such as wireless remote keys and active RFID tags work with intermittent pulse current output:

• Typical allowable peak pulse current: 5 mA ~ 10 mA (short-duration pulse, millisecond-level)

• Performance feature: CR1130 can withstand instantaneous pulse loads with moderate transient voltage dip, and voltage recovers rapidly after the pulse ends.

• Limitation: Repeated frequent large pulses will accelerate capacity loss and raise internal resistance, so system design shall avoid frequent heavy pulse exceeding the rated range.

Current Selection Suggestion

1. Static standby, microamp-level drain: CR1130 is the most cost-effective solution;

2. Frequent large pulse transmission: Evaluate larger-size CR coin cells or two-cell series scheme;

3. Continuous heavy current load: CR1130 is not applicable for such scenarios.

5. Compatible & Cross Reference Replacement Comparison Chart

5.1 Fully Interchangeable Equivalent Models (Direct Replacement, No Modification Required)

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5.2 Conditional Alternative Model

• BR1130 (Lithium Carbon Monofluoride)

  Same physical dimension as CR1130, can be mechanically installed in the same holder. However, BR series features lower discharge current capability and flatter discharge voltage, only suitable for ultra-low-power static backup. Not recommended for remote control and pulse-driven devices.

5.3 Non-Interchangeable Models (Do Not Replace Blindly)

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6. Testing & Quality Control Tips for Mass Procurement

1. Sampling test open-circuit voltage and internal resistance before incoming storage to screen out aged or defective batteries;

2. Verify pulse voltage stability if matching wireless transmitting products;

3. For tab-welded customized CR1130, confirm internal resistance consistency after welding to exclude heat-damaged cells;

4. Classify and store different equivalent models separately to avoid mixing up during production assembly.

7. Safety Note

CR1130 is an irreversible primary lithium battery. Forced charging, short-circuiting, crushing or incineration may cause swelling, leakage, combustion or explosion. Reverse installation will lead to equipment failure and abnormal power consumption. Waste batteries must be delivered to designated recycling bins rather than domestic waste.

Conclusion

Mastering CR1130’s voltage characteristics, internal resistance rules and pulse current limits helps designers match reasonable load parameters in circuit development. The cross-reference replacement chart standardizes component substitution in after-sales maintenance and bulk purchasing, effectively preventing assembly mismatch and abnormal product failure. This specification manual can be used as standardized technical document for internal technical archives, supplier communication and product BOM formulation.