The UNI-T UT677A is a portable, 4-wire AC battery internal resistance tester designed to measure lithium and lead-acid battery health (resistance: 0.000mΩ~3.100Ω, voltage: 0.000V~±71.00V, temperature: -10°C~60°C). It features a 3.5-inch color screen, 200ms fast response, 5000-data storage, Bluetooth (Android) connectivity, and PC software support.
Key Technical Specifications:
Internal Resistance Range: 0.000mΩ~3.100Ω (Accuracy: ±1%fs ±20dgt).
Voltage Measurement: 0.000V~±71.00V (Accuracy: ±0.2%fs ±10dgt).
Temperature Measurement: -10.0°C~60.0°C (Accuracy: ±1.0℃).
Measurement Method: AC 4-terminal method.
Display: 3.5-inch (320*240) 16-bit true color screen.
Data Storage: Up to 5000 sets.
Power Supply: Rechargeable lithium battery (300mA min / 500mA max consumption).
Dimensions & Weight: 190mm × 121mm × 51mm; 480g
The device is ideal for checking battery internal resistance and voltage simultaneously, often used for assessing battery aging and state-of-health in Lead-acid and Lithium-ion, or as an ESR meter for electrolytics.
