FNIRSI HRM-10 is a handheld battery internal resistance meter with voltage measurement up to 100 V DC and resistance up to 200 Ω. It is intended for checking the condition of batteries in various systems and allows sorting, saving measurement history and exporting data.

FNIRSI HRM-10 is a handheld meter for simultaneous measurement of internal resistance and voltage of various batteries. It uses Kelvin four-wire connection for more accurate measurements and allows manual selection of measurement ranges. It is intended for checking the condition of batteries in automotive and other systems, supporting sorting mode, storing measurement history and exporting data. The device is suitable for repair shops, laboratories or industrial users.

– TFT color screen for viewing the display
– Kelvin four-wire measurement method
– Measurement of internal resistance and voltage
– Support for saving and exporting data
– Battery sorting method

Technical features:
– Model: HRM-10
– Brand: FNIRSI
– Type: battery tester

Measuring ranges
– Voltage: 0 to ±100 V DC
– Voltage range selection: Auto, 1 V, 10 V, 100 V
– Resistance: 0 to 200 Ω
– Resistance range selection: Auto, 20 mΩ, 200 mΩ, 2 Ω, 20 Ω, 200 Ω
– Accuracy: ±0.5%
– Signal frequency: AC 1 kHz

Power supply
– Charging: USB Type C, 5 V 1 A
– Battery: 1000 mAh lithium battery
– Charging interface: Type C

Functions
– Automatic measurement of voltage and internal resistance
– Kelvin four-wire mode
– Manual setting of measuring ranges
– Battery sorting method
– Saving measurement history
– Data export
– User calibration support

Working environment
– Operating temperature: -10 to +45 °C, relative humidity < 80 %
– Storage temperature: -20 to +80 °C, relative humidity < 80 %

Dimensions and weight
– Size: 158.7 x 80.5 x 28.4 mm
– Weight: 225 g

Package includes: 1x Fnirsi HRM-10 battery internal resistance tester, 1x Kelvin clamps, 1x Battery testing adapter, 1x Measuring probe, 1x USB cable, 1x Instructions

Warranty: 12 months

Size: 158.7 x 80.5 x 28.4 mm
Weight: 0.345 kg

Manufacturer:

Shenzhen FNIRSI Technology Co., Ltd.
8F, Weihuada Industrial Park C building West, Li Rong Road Da Lang Street, / Longhua District
518109 Shenzhen
China
jason@fnirsi.com

Data of the responsible person in the EU:

Tech Trade doo Trzin
Blatnica 8
1236 Trzin, Slovenia SL
info@techtrade.si

Same summary

The Fnirsi HRM-10max battery internal resistance tester is especially suitable for users who want to quickly and easily check the condition of batteries or accumulators at home or in the field. Due to the digital and manual mode of operation, it can be easily used even by those who do not have any special knowledge of measurements, as it provides clear and repeatable results in everyday situations. The model will serve well for basic tests of electrical components, but is not intended for advanced measurements of higher voltages or professional laboratory use. Its special feature is portability, which is why it is the first choice for those who carry the device between different workplaces.

Recommendation source: Enaa guides and team experiences.

User view

This type of tester is often used by home craftsmen who check the condition of car, motorcycle or other batteries and batteries in various devices themselves. Due to its simple interface and digital display, it is also suitable for users who occasionally solve problems with electricity in the household or when maintaining garden equipment. There are also many enthusiasts who choose it for basic diagnostics, especially when they need reliable, but not too complex measurements.

Users often trust the Fnirsi brand for offering innovative and simple testing solutions and its compact, user-friendly products.

Why buy at Enaa

At Enaa, you can expect a range of proven products for DIYers and electrical measurement enthusiasts, with the ability to compare similar testers in the multimeter category and professional support from our team in choosing the most suitable model.

Answers to frequently asked questions

For which vehicles or batteries is the Fnirsi HRM-10max best suited?

The device is most useful for testing car, motorcycle, motorcycle and other classic lead-acid batteries, as well as most standard batteries for home use.

Is the tester easy to use for beginners?

Yes, the digital display allows for clear readings, and the manual design makes it easy to use even for those who are taking measurements for the first time.

Can I use the tester outside or in the garage?

The device is designed for field and garage use, but it is still recommended to be careful of excessive exposure to moisture when measuring outdoors.

Do I need special knowledge to measure the internal resistance of a battery?

You don't need any special knowledge for basic measurements, as the tester provides a direct display of the result — but for more complex analyses, it is recommended to know the basic principles of battery operation.

Can I also check voltage or continuity with this tester?

The main function of the HRM-10max tester is to measure the internal resistance of batteries and accumulators, but it is not designed for more extensive voltage or continuity measurements than classic multimeters allow.

Description updated: April 2026