FNIRSI HRM-10 Battery Voltage and Internal Resistance Tester

FNIRSI HRM-10 Battery Voltage and Internal Resistance Tester

The FNIRSI HRM-10 is a rechargeable four-wire battery tester designed to measure cell or battery voltage and internal resistance with separate current and sensing connections. It is suitable for battery sorting, consistency checks and maintenance records where ordinary two-wire resistance readings are not sufficient.

Key functions

• DC voltage measurement from 0 to plus or minus 100 V.
• Internal resistance measurement from 0 to 200 ohms with automatic and selectable ranges.
• Four-wire Kelvin measurement arrangement to reduce lead and contact resistance influence.
• Battery sorting, calibration, history review and data export functions.
• 1 kHz AC test signal for internal resistance measurement.

Instrument specifications

• Resistance ranges: Auto, 20 mΩ, 200 mΩ, 2 Ω, 20 Ω and 200 Ω.
• Listed basic accuracy: plus or minus 0.5 percent.
• Power: built-in 1000 mAh rechargeable battery.
• Charging input: USB Type-C, 5 V / 1 A.
• Approximate size: 158.7 × 80.5 × 28.4 mm; approximate weight: 225 g.

Standard and Plus options

The selector identifies the available package as HRM-10 Standard or HRM-10 Plus. The instrument model is the same; review the option image and listed package contents before ordering because included test fixtures and accessories can differ.

Use notes

• Clean the battery terminals and make firm Kelvin contact before recording a resistance result.
• Select a suitable resistance range when Auto mode does not provide a stable reading.
• Do not exceed the instrument's rated voltage, and disconnect the test leads before charging.