Battery Internal Resistance Tester with 4-Wire Kelvin Test for Lead-Acid and Lithium Batteries

Know your battery’s condition before poor performance turns into an unexpected failure. The IR500 is a precision battery health tester designed for technicians, repair professionals, DIY users, and anyone maintaining rechargeable battery systems. It measures voltage up to 120V DC and internal resistance from 0.000mΩ to 500Ω, covering lead-acid, lithium, alkaline, carbon, and button batteries. Four-wire Kelvin testing minimizes lead and contact resistance for more dependable readings, while automatic range switching makes everyday testing easier.

Key Features

• 4-wire Kelvin battery tester technology helps deliver accurate resistance measurements by reducing interference from test leads and contact resistance.
• Wide 0.00–120V DC voltage and 0.000mΩ–500Ω resistance ranges support diverse battery-testing needs.
• Measures up to 3 times per second with a 1KHz signal for quick battery assessment.
• Rechargeable 1200mAh lithium battery provides approximately 8 hours of operation per full charge.
• Automatic voltage/resistance range switching, LED lighting, and Hi/Lo battery-condition evaluation simplify testing in the workshop or field.
  
  

Why Choose Our IR500 Battery Internal Resistance Tester?
Unlike basic voltage testers that reveal only part of the picture, the IR500 combines voltage and internal-resistance testing to help you assess battery condition more effectively. Its broad measurement range also offers greater versatility than alternatives designed around narrower battery voltage or resistance ranges.

Perfect For

• Testing lead-acid battery tester applications, including automotive, UPS, and backup batteries
• Checking lithium and alkaline battery condition
• Electronics repair and battery maintenance
• Comparing cells before replacement or reuse
• Workshop, field-service, and DIY diagnostics
  
  

Test With Greater Confidence
Make battery checks faster, clearer, and more informative with the IR500. Order yours today and gain the measurements you need to make smarter battery maintenance and replacement decisions.