BT-500 Battery Resistance Tester

Model # BT-500

Product Description

Eagle Eye portable battery testers support the maintenance of UPS and storage batteries critical to the life support of all businesses. The BT-500 battery internal resistance tester sets the standard for assessing the deterioration and remaining life of lead-acid batteries by giving a complete diagnosis via battery resistance testing. Measure and save battery data in as fast as 2 seconds per cell/unit. Instantaneously diagnose degradation (PASS, CAUTION, FAIL) by measuring internal resistance and voltage. The BT-500-01 model is built-in with Bluetooth® wireless technology for managing data on mobile devices.

Product Features

PC Software Included
Included software allows importing of test data directly from the tester via USB. Import data from the mobile app via cloud transfer or email attachment. Generate reports in PDF, Excel or CSV, and Word.

Generate Comparative Judgments Based on a Lead-Acid Battery’s Internal Resistance and Voltage
By using its comparator function to simultaneously measure the internal resistance and voltage of a battery, the BT-500 can generate comparative judgments quantifying degradation of the cell based on user-specified threshold values.

Save Data Automatically when Testing Battery Terminals
The auto-hold function automatically holds measured values once they stabilize. The auto-memory function automatically stores measured values in the internal memory.

Create Reports in the Field with a Dedicated App
The BT-500-01 features Bluetooth® wireless technology. Measurement data loaded onto a tablet or smartphone can be viewed using templates and graphed to allow assessment of data. In addition, the app makes it possible to instantaneously create reports while in the field.

  • Technical Specs
  • Advantages
  • Applications

Technical Specs

Resistance Measurement Range:Resistance: 3 mΩ (Max. display 3.100 mΩ, resolution 1 μΩ) to 3 Ω (Max. display 3.100 Ω, resolution 1 mΩ), 4 ranges
Accuracy: ±0.8% rdg. ±6 dgt. (3 mΩ range: ±1.0% rdg. ±8 dgt.)
Testing Source Frequency: 1 kHz ±30 Hz, with function for avoiding noise frequency enabled: 1 kHz ±80 Hz
Testing Current: 160 mA (3m/30 mΩ range), 16 mA (300 mΩ range), 1.6 mA (3 Ω range)
Open-Circuit Voltage: 5 V peak
Voltage Measurement Range:±6 V (Max. display ±6.000 V, resolution: 1 mV) to ±60 V (Max. display ±60.00 V, resolution: 10 mV), 2 ranges, Accuracy: ±0.08% rdg. ±6 dgt.
Max Input Voltage:60 V DC max. (No AC input)
Display Update Rate:Approx. 3 times/s
Comparator Functions:Setting: Resistance warning limit and resistance failure limit, and voltage warning limit; Number of comparator setting: 200 sets
Comparator Output: LCD display of PASS, WARNING, or FAIL. (Select beeper to sound on PASS/WARNING or FAIL)
Data Storage:Max. storable data: 6000 sets. (Saved items: Date, time, resistance value, voltage value, temperature, comparator setting values, and comparator judgement.)
Communication:BT-500: USB to PC software
BT-500-01: Built in Bluetooth® 4.0 LE (Bluetooth® SMART), supports tablets and smart phones with iOS8 or Android™4.3 or later
Power Supply:LR6 (AA) Alkaline dry battery ×8, Continuous operating time: 8.5 hr
Dimensions WxHxD:192 x 121 x 55 mm (7.56 x 4.76 x 2.17 in.)
Weight:800 g (1.76 lbs.) with batteries


  • Measure and save data in as fast as 2 seconds, a 60% improvement from previous models
  • Instantaneously diagnose degradation (PASS, CAUTION, FAIL) by measuring internal resistance and voltage
  • Noise Reduction Technology improves noise resistance
  • Send or display measurement data in real-time via Bluetooth ® wireless technology


  • Utilities
  • UPS
  • Service Groups
  • Oil, Gas, Fuel
  • Green Energy
  • Nuclear Power
  • Municipalities
  • CATV/Broadband
  • Mining
  • Hospitals
  • Alarm/Emergency Lighting
  • Motive Power
  • Telecommunication
  • Transportation
  • Mission Critical Facilities
  • Electronics
  • Industrial Manufacturing
  • Battery Manufacturers and Suppliers
Request a Quote

Or call toll-free

Request Information
  • Model #

    Battery Resistance Tester (Bluetooth optional)

Request a Quote

Or call toll-free