FNIRSI HRM-10 Battery Internal Resistance Tester Complete Guide Malaysia

Introduction

Battery performance is an important consideration for electronics repair workshops, battery distributors, engineering laboratories, industrial maintenance teams and rechargeable battery service businesses.

When evaluating rechargeable batteries, measuring voltage alone may not provide enough information about their electrical characteristics.

A battery can display a normal terminal voltage while showing unusually high internal resistance, which may affect its performance under load.

The FNIRSI HRM-10 Battery Internal Resistance Tester is a handheld instrument designed to measure battery internal resistance and DC voltage.

Using an approximately 1kHz AC measurement method and four-wire Kelvin probes, the HRM-10 provides a practical solution for selected battery cell inspection, comparison and troubleshooting applications.

This complete guide covers FNIRSI HRM-10 features, specifications, working principles, battery compatibility, applications, measurement procedures, troubleshooting and buying considerations for customers in Malaysia.

What Is the FNIRSI HRM-10?

The FNIRSI HRM-10 is a specialized battery testing instrument designed to measure the electrical resistance characteristics of compatible batteries.

Its two primary measurement functions are:

• Battery Internal Resistance Measurement

• DC Battery Voltage Measurement

Internal resistance testing can provide useful information when comparing rechargeable cells of the same model.

The HRM-10 may be used for applications involving compatible individual 18650 lithium-ion cells, 21700 lithium-ion cells, LiFePO4 cells and selected lead acid batteries.

However, it is not a complete battery capacity tester, automotive CCA analyzer or high-voltage battery system diagnostic instrument.

FNIRSI HRM-10 Main Specifications

Important: Specifications should be checked against the latest FNIRSI documentation before purchasing. Measurement accuracy, resolution and operating limitations depend on the instrument's specified ranges and conditions.

Why Is Battery Internal Resistance Important?

Battery internal resistance affects how a battery behaves when electrical current flows.

A battery with higher internal resistance may experience greater voltage drop and heating under load.

This can be relevant in applications such as:

• Rechargeable Power Tools

• Portable Electronics

• Battery Pack Assembly

• Backup Power Batteries

• Industrial Measuring Equipment

• Electric Mobility Battery Cells

• Battery Quality Control

However, battery internal resistance is not a direct measurement of battery capacity or remaining service life.

It should be evaluated alongside other appropriate battery information.

Battery Voltage vs Internal Resistance

Battery voltage and internal resistance measure different electrical characteristics.

Battery Voltage indicates the electrical potential difference between battery terminals.

Battery Internal Resistance describes an electrical resistance characteristic inside the battery.

Consider the following illustrative example.

Illustrative readings only. These are not universal battery acceptance limits.

All three cells display similar voltage.

However, Cell C shows a higher internal resistance reading.

This difference may justify further investigation.

A normal battery voltage reading does not automatically indicate normal internal resistance or full battery capacity.

How Does FNIRSI HRM-10 Measure Internal Resistance?

The FNIRSI HRM-10 uses an approximately 1kHz AC measurement method.

The instrument applies a small AC test signal and evaluates the resulting electrical response.

This method is used to obtain an internal resistance reading.

However, an approximately 1kHz AC resistance value is not necessarily identical to the battery's DC resistance during high-current discharge.

Different measurement methods may produce different results.

For meaningful comparisons, use consistent measurement conditions and appropriate reference data.

What Is Four-Wire Kelvin Measurement?

One important feature of the FNIRSI HRM-10 is its four-wire Kelvin measurement connection.

Battery internal resistance is often measured in milliohms.

At such low resistance levels, ordinary test lead resistance can affect the measurement.

Four-wire Kelvin measurement separates the current-carrying path from the voltage sensing path.

This helps reduce the influence of test lead resistance.

Advantages of Four-Wire Kelvin Measurement

• Useful for Low-Resistance Measurement

• Reduces Test Lead Resistance Influence

• Supports Battery Cell Comparison

• Improves Measurement Repeatability When Properly Applied

However, Kelvin measurement does not eliminate every possible source of error.

Probe contact quality, temperature, battery condition and instrument accuracy remain important.

FNIRSI HRM-10 for 18650 Lithium Battery Testing

18650 lithium-ion batteries are commonly used in rechargeable electronics and battery assemblies.

The 18650 designation refers to a cylindrical cell format with approximate dimensions of 18mm diameter and 65mm length.

The HRM-10 can measure internal resistance and DC voltage on compatible individual 18650 cells.

Typical applications include:

• Electronics Repair

• Battery Cell Comparison

• Rechargeable Battery Inspection

• Battery Pack Assembly Quality Control

• Technical Training

When comparing 18650 cells, use cells of the same model and similar testing conditions.

There is no universal milliohm acceptance limit suitable for every 18650 battery.

FNIRSI HRM-10 for 21700 Lithium Battery Testing

21700 lithium-ion batteries have approximate dimensions of 21mm diameter and 70mm length.

They are used in selected power tools, rechargeable equipment and battery pack applications.

Compared with 18650 cells, the larger format may allow higher capacity, depending on the battery design.

However, physical size alone does not determine electrical performance.

The HRM-10 can support voltage and internal resistance comparison of compatible individual 21700 cells.

Battery model, chemistry, temperature and state of charge should be considered when interpreting measurements.

FNIRSI HRM-10 for LiFePO4 Battery Testing

Lithium iron phosphate batteries, commonly called LiFePO4 or LFP batteries, are used in energy storage and other rechargeable applications.

The HRM-10 may be suitable for compatible individual LiFePO4 cells.

However, some large-format LiFePO4 cells have extremely low internal resistance.

Before using the HRM-10 for such measurements, verify that its specified resolution and accuracy are sufficient.

The HRM-10 should not be treated as a universal solar energy storage or high-voltage battery bank tester.

Complete battery systems require appropriately rated equipment and approved testing procedures.

FNIRSI HRM-10 for Lead Acid Battery Testing

Lead acid batteries are used in various backup power and industrial applications.

Common types include:

• Flooded Lead Acid

• AGM

• Gel

• VRLA

The HRM-10 may be used for compatible individual lead acid battery measurements within its approved operating limits.

However, internal resistance alone does not determine lead acid battery capacity or automotive starting performance.

For applications requiring CCA testing, battery capacity testing or critical UPS maintenance, additional specialized equipment may be necessary.

How to Use FNIRSI HRM-10

The following general procedure applies to compatible individual battery cells that can be safely tested.

Step 1 - Identify the Battery

Confirm the manufacturer, model, chemistry and nominal voltage.

Step 2 - Inspect the Battery

Check for physical damage, leakage, deformation or signs of overheating.

Do not perform routine testing on unsafe batteries.

Step 3 - Check Testing Conditions

Record the battery temperature and relevant charge conditions.

Step 4 - Prepare the Instrument

Inspect the FNIRSI HRM-10 and connect the Kelvin probes according to the operating instructions.

Step 5 - Measure DC Voltage

Contact the battery terminals correctly and record the displayed voltage.

Step 6 - Measure Internal Resistance

Maintain stable probe contact and record the resistance reading.

Step 7 - Repeat if Necessary

Repeat unusual measurements to verify consistency.

Step 8 - Compare Results

Compare the readings with suitable reference data for the same battery model.

Step 9 - Perform Additional Testing

If required, use capacity testing or other appropriate diagnostic methods.

Always follow battery safety procedures and the manufacturer's operating instructions.

Application 1 - Electronics Repair Workshops

Electronics repair technicians often encounter rechargeable batteries with reduced performance.

The FNIRSI HRM-10 can provide additional information through internal resistance measurement.

For example, a technician may investigate a portable electronic device that shuts down unexpectedly.

A digital multimeter can help check voltage and circuit connections.

The HRM-10 can support compatible battery cell resistance measurement.

Further testing may be needed to determine the actual cause.

Application 2 - Battery Pack Assembly

Battery pack assembly businesses may compare individual cells before assembly.

Important characteristics include:

• Battery Voltage

• Internal Resistance

• Capacity

• Battery Chemistry

• Discharge Capability

• Manufacturer Specifications

The HRM-10 can support voltage and resistance comparison.

However, safe battery pack assembly requires more than resistance matching.

Only qualified personnel should assemble or service lithium-ion battery packs using approved procedures.

Application 3 - Battery Quality Control

Battery distributors and electronics manufacturers may use internal resistance measurements during incoming inspection.

A typical inspection record may include:

Example for illustration only.

The HRM-10 can support the voltage and resistance measurements.

However, formal QC decisions require validated acceptance criteria and appropriate measurement accuracy.

Application 4 - UPS Battery Inspection

UPS systems use batteries to provide backup power during electrical supply interruptions.

Internal resistance measurement can be useful in selected battery maintenance activities.

However, critical UPS installations may involve complex battery banks, high stored energy and strict maintenance requirements.

The HRM-10 is not a dedicated industrial UPS battery analyzer.

Use manufacturer-approved maintenance procedures and appropriately rated professional equipment for complete UPS systems.

Application 5 - Power Tool Battery Inspection

Rechargeable power tools often use lithium-ion battery packs.

Individual cells may develop differences in electrical performance over time.

The HRM-10 can support compatible individual cell inspection during qualified servicing.

However, complete power tool battery packs may contain protection electronics and high available current.

The instrument should not be treated as a universal assembled battery pack diagnostic tool.

Application 6 - E-Bike and Electric Scooter Batteries

Electric bicycles and scooters may use multiple lithium-ion cells connected into battery packs.

The HRM-10 can support measurement of compatible individual cells.

However, it does not provide complete battery management system diagnostics.

Complete electric mobility battery packs require qualified personnel, appropriate safety procedures and suitable diagnostic equipment.

FNIRSI HRM-10 vs Digital Multimeter

A digital multimeter is more versatile for general electrical work.

The HRM-10 provides dedicated battery internal resistance measurement.

Both instruments can complement each other in a repair workshop.

FNIRSI HRM-10 vs Battery Capacity Tester

The HRM-10 does not directly measure battery capacity.

A capacity tester is required when the objective is to evaluate available charge under specified conditions.

FNIRSI HRM-10 vs Automotive Battery Tester

Automotive battery testers may evaluate starting battery performance and estimate cold cranking amps.

The FNIRSI HRM-10 does not directly measure CCA.

Customers requiring automotive battery starting performance analysis should select an appropriate automotive battery tester.

Common FNIRSI HRM-10 Measurement Problems

Problem 1 - Unstable Resistance Reading

Possible causes include poor probe contact, loose connections or measurement interference.

Solution: Inspect the leads, stabilize probe contact and repeat the measurement.

Problem 2 - Unexpectedly High Resistance

Possible causes include battery ageing, temperature differences, poor contact or incorrect reference values.

Solution: Verify the setup and compare against suitable manufacturer specifications.

Problem 3 - Different Readings Between Testers

Different instruments may use different measurement frequencies and methods.

Solution: Compare measurement methods before interpreting differences.

Problem 4 - Very Low Resistance Values

Some battery cells have resistance values close to an instrument's measurement limits.

Solution: Verify that the specified resolution and accuracy are adequate.

Problem 5 - Normal Voltage but Poor Battery Performance

A battery may have normal open-circuit voltage but reduced capacity or other performance problems.

Solution: Perform additional battery evaluation where necessary.

Factors That Affect Battery Internal Resistance Readings

For consistent measurements, consider the following factors.

A standardized testing procedure is important for meaningful battery comparison.

FNIRSI HRM-10 Buying Guide Malaysia

Before buying a battery internal resistance tester, consider:

1. Battery Compatibility

Identify the battery chemistry, model and configuration.

2. Measurement Range

Confirm the instrument covers the required resistance and voltage values.

3. Measurement Accuracy

Check the specified accuracy and resolution.

4. Kelvin Probe Design

Ensure the probes are suitable for the intended battery terminals.

5. Testing Application

Determine whether the instrument will be used for workshop troubleshooting, incoming inspection or laboratory measurement.

6. Additional Testing Requirements

Consider whether capacity, CCA, insulation or BMS diagnostics are also required.

7. Technical Support

Choose a supplier that can provide product information and suitable technical guidance.

FNIRSI HRM-10 Price in Malaysia

Customers searching for FNIRSI HRM-10 price Malaysia should consider more than the purchase price alone.

Important factors include:

• Measurement Features

• Instrument Accuracy

• Included Accessories

• Warranty Terms

• Technical Support

• Application Suitability

• Product Availability

For current pricing and product availability, contact MTM Precision Sdn Bhd.

Frequently Asked Questions

Q1. What does FNIRSI HRM-10 measure?

It measures battery internal resistance and DC voltage.

Q2. Can FNIRSI HRM-10 test 18650 batteries?

Yes, for compatible individual 18650 lithium-ion cells.

Q3. Can FNIRSI HRM-10 test 21700 batteries?

Yes, for compatible individual 21700 lithium-ion cells.

Q4. Can FNIRSI HRM-10 test LiFePO4 batteries?

It may be suitable for compatible individual LiFePO4 cells, depending on measurement accuracy and operating limits.

Q5. Can FNIRSI HRM-10 test lead acid batteries?

It may be used on compatible individual lead acid batteries within the manufacturer's specified limits.

Q6. Does FNIRSI HRM-10 measure battery capacity?

No. It does not directly measure capacity in mAh or Ah.

Q7. Does FNIRSI HRM-10 measure CCA?

No. It is not a dedicated automotive CCA tester.

Q8. What is four-wire Kelvin measurement?

It is a low-resistance measurement method that reduces the influence of test lead resistance.

Q9. Can FNIRSI HRM-10 test complete battery packs?

Do not assume that it can. Complete packs require compatibility assessment, appropriate safety procedures and manufacturer-approved testing methods.

Q10. Where can I buy FNIRSI HRM-10 in Malaysia?

Contact MTM Precision Sdn Bhd for product information, quotation and availability.

Why Choose MTM Precision for Battery Testing Equipment?

MTM Precision Sdn Bhd supplies electrical testing instruments, industrial measuring equipment and battery inspection tools in Malaysia.

Customers can contact MTM Precision for assistance with identifying suitable instruments for their measurement requirements.

Our product categories support applications involving:

• Electrical Testing

• Battery Inspection

• Electronics Troubleshooting

• Industrial Maintenance

• Engineering Laboratories

• Quality Control

Customers are encouraged to provide the battery model, application and required measurement specifications when requesting a quotation.

Conclusion

The FNIRSI HRM-10 Battery Internal Resistance Tester is a handheld instrument designed for battery internal resistance and DC voltage measurement.

Its approximately 1kHz AC measurement method and four-wire Kelvin connection make it useful for selected low-resistance battery testing applications.

The instrument can support inspection of compatible individual 18650, 21700, LiFePO4 and lead acid batteries, subject to its measurement limits and the battery configuration.

For electronics repair workshops, battery service businesses, engineering laboratories and industrial maintenance teams in Malaysia, the HRM-10 can be a practical supplementary battery measurement instrument.

However, battery internal resistance measurement does not replace capacity testing, automotive CCA analysis or complete battery system diagnostics.

Choosing the correct testing equipment and following appropriate safety procedures remain essential.

Where to Buy FNIRSI HRM-10 in Malaysia?

MTM Precision Sdn Bhd supplies electrical testing instruments, battery inspection equipment and industrial measuring tools in Malaysia.

Customers searching for FNIRSI HRM-10 Battery Internal Resistance Tester Malaysia can contact MTM Precision for product information, quotations and availability.

We support customers across Kuala Lumpur, Selangor, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kedah, Kelantan, Terengganu, Perlis, Sabah and Sarawak.

Contact MTM Precision Sdn Bhd

MTM Precision Sdn Bhd

Showroom & Service Centre

No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.

Tel: 03-8080 7172

WhatsApp: +6016-660 7346

Email: mtmpre@yahoo.com

Website: www.mtmpre.com.my

Contact MTM Precision today for FNIRSI HRM-10 product information, quotations and availability in Malaysia.