Why can the measurement of internal resistance be a good or bad sign for a battery?

The battery will be damaged during use, the capacity will decrease and the internal resistance will increase. The lower the internal resistance of the battery, the better the performance and the higher the load capacity.

Does the battery need to be fully charged for measurement?

The internal resistance of a battery is usually different when it is fully charged and when it is low. When the battery is fully charged, the internal resistance is usually lower. When the battery is low, the internal resistance is usually higher.

Why are the measurements unstable?

There is poor contact between the test clip and the battery, or there is a strong background noise.

Why is the measured internal resistance higher than the battery internal resistance?

The internal resistance of a large capacity battery is very low. The internal resistance of the battery electrode or wire is often higher than the internal resistance of the battery.The clamp needs to be in the correct position to get accurate data.

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FNIRSI HRM-10 Voltage Internal Resistance Battery Tester, Meter for Various Types, Car AAA AA, 100V 200Ω, Digital Analyzer for Household Automotive

FNIRSI HRM-10 Voltage Internal Resistance Battery Tester, Meter for Various Types, Car AAA AA, 100V 200Ω, Digital Analyzer for Household Automotive

Product ID: 675024022

Details

Brand
FNIRSI
Colour
Black
Item Weight
0.48 Ounces
Power Source
Battery
Style
Black

⚡100V max voltage range

📊8 sets historical data storage

🔋200Ω internal resistance range

₨2096

Duties & taxes included

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up your diagnostics with precision and style!

VIVID TFT HD DISPLAY - Crystal-clear color screen elevates your testing experience beyond basic monochrome meters.
DATA DRIVEN DECISIONS - Store, review, and export up to 8 sets of historical measurements to track battery performance trends.
KELVIN 4 WIRE ACCURACY - Advanced connection method eliminates contact resistance for ultra-reliable readings.
DUAL PARAMETER PRECISION - Simultaneously measures voltage & internal resistance for a full battery health snapshot.
UNIVERSAL BATTERY COMPATIBILITY - From AAA to car batteries, test them all with one sleek handheld device.

The FNIRSI HRM-10 is a compact, battery-powered digital tester designed for professionals and enthusiasts alike. It accurately measures both voltage (up to 100V) and internal resistance (up to 200Ω) using a Kelvin four-wire method, displayed on a vibrant TFT HD color screen. Compatible with a wide range of batteries including automotive and household types, it supports historical data storage and export, making it an essential tool for proactive battery maintenance and quality assurance.

Specifications

ASIN	B0D6FPBGCX
Brand Name	FNIRSI
Colour	Black
Customer Reviews	4.4 4.4 out of 5 stars (168)
Included Components	Date cable and kelvin clip test line
Item Weight	0.48 Ounces
Manufacturer	FNIRSI
Measurement Type	Ohmmeter, Voltmeter
Minimum Operating Voltage	100 Volts
Model Number	FNIRSI HRM-10
Number of Items	1
Part Number	001
Power Source Type	Battery Powered
Specification Met	CE, RoHS
Style Name	Black
Upper Temperature Rating	45 Degrees Celsius

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