UNI-T UT677C Battery Internal Resistance Tester with 3.5-inch TFT LCD, 4-Wire Kelvin Measurement, USB Data Export

Measure internal resistance from 0.000mΩ to 3.100Ω with ±(0.5% + 5 digits) accuracy using the UNI-T UT677C. This portable tester employs a 4-wire Kelvin connection to eliminate lead resistance, ensuring precise readings for battery health assessment and maintenance.

Overview

The UNI-T UT677C is a professional battery internal resistance tester designed for evaluating the condition of batteries in various applications, including UPS systems, electric vehicles, and energy storage. It measures internal resistance and DC voltage simultaneously, providing a comprehensive view of battery health. The device features a 3.5-inch TFT LCD display with 320x240 resolution, offering clear visibility of measurement results and parameters. Data storage capacity of 1000 groups allows for on-site recording, and the USB interface enables data transfer to a PC for further analysis using the included software.

What stands out

• High-precision 4-wire Kelvin measurement method for accurate internal resistance readings
• Wide measurement range: 0.000mΩ to 3.100Ω for resistance and 0.000V to 100.00V for DC voltage
• Large 3.5-inch TFT LCD with backlight for easy reading in various lighting conditions
• Rechargeable 3.7V 3000mAh Li-ion battery for extended field use
• USB connectivity with PC software for data analysis and export
• Configurable auto power off and data hold function for convenience
• Safety rated CAT II 100V for safe operation on low-voltage circuits

Technical details

• Internal Resistance Measurement Range: 0.000mΩ to 3.100Ω
• Internal Resistance Accuracy: ±(0.5% + 5 digits)
• DC Voltage Measurement Range: 0.000V to 100.00V
• DC Voltage Accuracy: ±(0.05% + 5 digits)
• Test Frequency: 1kHz AC
• Display Type: 3.5-inch TFT LCD (320x240 pixels)
• Data Storage Capacity: 1000 groups
• Communication Interface: USB
• Power Supply: 3.7V 3000mAh Li-ion battery (rechargeable)
• Operating Temperature: 0°C to 40°C
• Operating Humidity: ≤75% RH
• Safety Rating: CAT II 100V
• Measurement Method: 4-wire Kelvin connection
• PC Software Support: Yes (for data analysis and export)
• Auto Power Off: Yes (configurable)
• Backlight: Yes
• Low Battery Indication: Yes
• Data Hold Function: Yes
• Measurement Speed Modes: Fast, Normal, Slow

Our verdict

The UNI-T UT677C delivers lab-grade precision in a rugged, portable package, making it an essential tool for professionals who demand accurate battery diagnostics in the field.