Diagnose Batteries Faster with the AvieHast Battery Internal Resistance Tester

The AvieHast Battery Internal Resistance Tester is a handheld diagnostic tool for technicians, battery builders, e-bike and EV enthusiasts, solar installers and electronics hobbyists who need to know the real condition of a cell or pack. Using a true 4-wire Kelvin measurement at 1kHz AC, the AvieHast Battery Internal Resistance Tester reads voltage and internal resistance at the same time, with a DC voltage range of 0 to ±100V, a resistance range up to 200Ω and a stated accuracy of ±0.5%.

Built for the bench and the field, the AvieHast Battery Internal Resistance Tester (model HRM10) adds a pass/fail sorting mode with your own thresholds, stored test history with data table export, user calibration and a rechargeable 1000mAh lithium battery with USB Type-C charging. At just 225g, it is easy to carry between the workshop, the garage and on-site jobs.

Why Choose the AvieHast Battery Internal Resistance Tester?

Accurate Battery Health Checks Without Lead Resistance Errors

Voltage alone rarely tells the full story of a battery. A cell can show a healthy voltage yet have high internal resistance that limits its output under load. The AvieHast Battery Internal Resistance Tester uses separate current and sense leads, so the resistance of the test leads themselves is removed from the reading. The result is a more faithful internal impedance figure, helping you match cells, spot weak ones and make better decisions when building or servicing battery packs.

AvieHast Battery Internal Resistance Tester Key Features

• True 4-wire Kelvin measurement method
• 1kHz AC internal resistance testing
• Simultaneous voltage and internal resistance display
• DC voltage range of 0 to ±100V
• Internal resistance range up to 200Ω
• ±0.5% stated accuracy
• 1V, 10V and 100V voltage scales with automatic or manual selection
• Voltage resolution down to 0.1V
• Cell sorting mode with user-set pass/fail thresholds
• Test history storage with data table export
• User calibration support
• Rechargeable 1000mAh lithium battery with USB Type-C charging (5V/1A)
• Compact 158 × 80mm body weighing 225g
• Rugged housing with a storage temperature range of −20°C to +80°C

4-Wire Kelvin Testing with the AvieHast Battery Internal Resistance Tester

Readings You Can Trust Down to Low Resistance Values

The AvieHast Battery Internal Resistance Tester applies a 1kHz AC signal through one pair of leads and measures the response through a second pair. This Kelvin 4-wire arrangement cancels out the resistance of the leads and contacts, which matters when you are measuring the very low internal resistance values typical of lithium cells.

Benefits include:

• Removes lead resistance from the measurement
• More faithful internal impedance readings
• Better cell-to-cell comparison when building packs
• Clearer identification of ageing or damaged cells
• Consistent results across repeated tests

It is the measurement approach of choice when precision matters.

Dual Voltage and Resistance Readings

See the Full Picture in a Single Test

Instead of switching between instruments, the AvieHast Battery Internal Resistance Tester shows voltage and internal resistance on screen at the same time. Voltage scales of 1V, 10V and 100V can be selected automatically or manually, with resolution down to 0.1V, across a DC range of 0 to ±100V.

Ideal for:

• 18650 and other lithium-ion cells
• Lithium battery packs
• Lead-acid batteries
• Electric vehicle battery packs
• E-bike and scooter batteries
• Industrial battery systems up to 100V

One quick test gives you both of the figures that matter most.

Cell Sorting Mode on the AvieHast Battery Internal Resistance Tester

Separate Good Cells from Faulty Ones in Seconds

When you are working through a batch of cells, the sorting mode on the AvieHast Battery Internal Resistance Tester saves a great deal of time. Set your own voltage and resistance thresholds, then test each cell and the display shows whether it passes or fails against your limits.

Perfect for:

• Grading recycled or second-hand cells
• Matching cells for DIY battery packs
• Incoming inspection of new cell batches
• Battery repair and refurbishment
• Quality checks in small production runs

Fast, repeatable sorting helps you build safer and better-balanced packs.

Data Storage, Export and Calibration

Keep Records and Maintain Measurement Confidence

The AvieHast Battery Internal Resistance Tester stores your test history and lets you export data tables, so results can be added to reports, maintenance logs or pack build records. User calibration is also supported, allowing you to keep the tester performing consistently over time.

Advantages include:

• Stored measurement history
• Exportable data tables for reports
• Easier tracking of battery condition over time
• Manual user calibration
• Professional documentation for customers

Ideal for workshops that need traceable battery test results.

Portable, Rechargeable and Built for the Field

A Compact Battery Tester That Goes Where You Work

Weighing 225g and measuring 158 × 80mm, the AvieHast Battery Internal Resistance Tester fits easily into a tool bag. Its internal 1000mAh lithium battery supports long test sessions and recharges through USB Type-C at 5V/1A, while the rugged housing is rated for storage between −20°C and +80°C.

Suitable for:

• Electronics workshops
• Battery repair benches
• Solar and off-grid installations
• EV and e-bike servicing
• Laboratories and training rooms
• On-site maintenance visits

Lightweight and self-powered, it is ready whenever a battery needs checking.

AvieHast Battery Internal Resistance Tester Technical Specifications

What's Included

AvieHast Battery Internal Resistance Tester FAQs

What makes 4-wire testing different?

The AvieHast Battery Internal Resistance Tester uses separate current and sense leads, which removes the resistance of the test leads from the result and gives a more faithful internal impedance reading.

Which batteries can I test?

The AvieHast Battery Internal Resistance Tester can be used with 18650 lithium cells, lithium battery packs, lead-acid batteries, EV battery packs and industrial battery systems up to 100V.

How does the cell sorting mode work?

You set your own threshold values, and the AvieHast Battery Internal Resistance Tester shows on the display whether each tested cell passes or fails.

Can I export my test history?

Yes. The AvieHast Battery Internal Resistance Tester stores measurements and can export data tables for reports and records.

What voltage range does it support?

The AvieHast Battery Internal Resistance Tester measures from 0 to ±100V DC, with automatic or manual 1V, 10V and 100V scales and resolution down to 0.1V.

How is the tester powered?

The AvieHast Battery Internal Resistance Tester has a built-in 1000mAh lithium battery for long test sessions and recharges through USB Type-C at 5V/1A.

Can I calibrate the tester myself?

Yes. The AvieHast Battery Internal Resistance Tester supports manual user calibration.

Is it easy to carry?

Yes. The AvieHast Battery Internal Resistance Tester weighs 225g and measures 158 × 80mm, so it fits comfortably in a tool bag.

Why Choose the AvieHast Battery Internal Resistance Tester?

The AvieHast Battery Internal Resistance Tester combines true 4-wire Kelvin testing at 1kHz, simultaneous voltage and internal resistance readings, a 0 to ±100V range, ±0.5% accuracy, a pass/fail sorting mode, data export and user calibration in a compact, rechargeable handheld unit. It is a practical choice for anyone who builds, repairs, grades or maintains batteries.

Build Better Battery Packs with the AvieHast Battery Internal Resistance Tester

From matching 18650 cells for a DIY pack to checking lead-acid and EV batteries on site, the AvieHast Battery Internal Resistance Tester gives you the precise voltage and internal resistance figures you need to work with confidence. Add the AvieHast Battery Internal Resistance Tester to your toolkit and take the guesswork out of battery diagnostics.