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Internal AC Resistance Tester for All Batteries (AC@1KHZ, 1 - 3999 m-ohm) - EQ-MSK-BK300

In stock
Item Number: MSK-BK300
EQ-MSK-BK300 is a precision internal resistance meter for R&D or quality control of all rechargeable batteries, which has an accuracy up to 1 milli-ohm and can measure any battery from 0-19.99V. It is an ideal tool for UN38.3 Initial Characteristics

  • Adopts sine wave AC power with a frequency of 1000Hz to carry out the test on the battery's internal resistance. AC current used for the test is about 10mA.
  • Applicable for internal resistance test of conventional capacitance single battery and its battery group. 
  • Built-in standard precision resistance (50 m-ohm), facilitating the user to calibrate the instrument test accuracy.
  • Capable of judging synchronously battery internal resistance and voltage, using the microprocessor to set the upper/lower limit of the internal resistance and voltage alarm, outputting the audible and visual alarm.

Available battery voltage measuring range

  • Two selectable ranges:
    • DC 0 ~ 4.999V +/- (Accuracy: 2mV + 0.5% FS  with resolution +/- 1mV)
    • DC 5 ~ 19.99V +/- (Accuracy: 20mV + 0.5% FS  with resolution +/- 10mV)

Battery internal resistance

  • Two selectable ranges:
    • 1m-ohm ~299.9m-ohm:    Accuracy:   +/- (0.5% FS + 0.5 m-ohm) with resolution  +/- 0.1m-ohm
    • 300 m-ohm ~3999m-ohm:  Accuracy +/- (0.5% FS +5 m-ohm) with resolution +/- 1.0 m-ohm

Battery Holder

Then cylinder battery holder and cable are included for measuring the cylinder cell and battery pack at ease.


  • AC110/220V, 50/60HZ, dissipation < 10W, 
  • (FOR 110V, PLEASE USE the EQ-AD-TF 60W transformer which can plug into 110V power and is included in the package.  Click picture below for detailed specs )

340 (W) x 110 (H) x 365 (D).
Warranty One year limited with lifetime support

Operation Instructions

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