The ITECH IT5100 Series battery testers

The Itech IT5100 series battery testers are specifically designed to measure the internal resistance of a battery. Battery internal resistance is an important technical indicator to assess battery performance. It is also a necessary test item when inspecting the manufacturing process of a battery.

The IT5100 allows you to simultaneously measure the internal resistance and voltage of all types of high speed batteries. Regardless whether it concerns button cells or large cell battery packs.

Functions IT5100 Series battery testers

To avoid the influence caused by cabling and to ensure the precision of the test, IT5101 and IT5101E use a Kelvin four wire resistance measurement method. The measurement is carried out with a small alternating current, the so-called AC-IR measurement. This has a number of advantages over the widely used DC measurement:

  • The cell does not need to be loaded first. This speeds up the measuring process significantly: from at least a few tens of minutes to 10 seconds.
  • Research has shown that a low-frequency AC measurement results in more stable readings.
  • The small AC measurement current does not require extensive equipment.  Instead of 100 Adc it is possible to measure with 1.5 Aac current.

A USB flash drive can be connected to the IT5101 to store data and perform statistical calculations. The measurement data of the IT5100 series can be saved as a .csv file.


The instrument is equipped with a 4.3inch LCD display that simultaneously shows the resistance and voltage. The voltage range runs from 10 µV to 300 V and the resistance range from 150 μΩ to 3000 Ω.
GPIB, USB and LAN interfaces are standard available and the instrument can be controlled via SCPI.


The IT5100 series is an ideal solution for various types of batteries, such as for mobile phones, unmanned air vehicles (UAV), electric vehicle (EV) batteries, contact resistance, equivalent series resistance (ESR), etc.

For detailed information about this new module, please check the datasheet.

Should you need more information or advice on the optimal battery tester for your application, please contact us!



Arnold Memelink

Arnold Memelink


"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."

University of Luxembourg

Sasan Rafii-Tabrizi

University of Luxembourg

“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”


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