UNI-T UT677A+ Battery Internal Resistance Tester, 0.000 mΩ–3 Ω, 0–70 V, Bluetooth (UT677A+)

The UNI-T UT677A+ is a battery internal resistance tester for assessing the condition of rechargeable batteries, including lead-acid and lithium types, by measuring their internal resistance and voltage. Using the AC four-terminal method, it accurately measures internal resistance without interference from lead resistance. Features include data storage, retrieval, alarms, auto shut-off, and strong anti-interference, making it essential for battery production, installation, and maintenance.

Key features

• Battery internal resistance: 0-3 Ω (4 ranges; 1 μΩ)
• Voltage (UT677A+): 0-70 V
• Manual & auto measurement
• PC software and Bluetooth APP supported
• Rechargeable Lithium Battery: 2600 mAh
• Auto power off and low battery indication
• Fast response (200 ms); test time: 2 s
• Data hold and storage (500 sets)
• Certifications: CE

Specifications

• Resolution: 0.000 mΩ~3 mΩ / ±1 % fs. ±20 dgt (1 μΩ); 3.000 mΩ~30 mΩ / ±0.5 % fs. ±15 dgt. (10 μΩ); 3.000 mΩ~300 mΩ / ±0.5 % fs. ±15 dgt. (100 μΩ); 300 mΩ~3 Ω / ±0.5 % fs. ±15 dgt. (1 mΩ)
• Battery Voltage range: 0.000 V~±7 V / ±0.2 % fs. ±10 dgt. (1 mV); 7 V~±71.00 V / ±0.2 % fs. ±10 dgt. (10 mV)
• Guaranteed accuracy conditions: 23 °C ±5 °C, <75 % RH
• Features: Battery internal resistance measurement; Battery voltage measurement
• Battery types: Lead-acid battery, lithium battery, and other types of batteries
• Measurement methods: Internal resistance: 1 kHz AC 4-terminal test method; Open circuit terminal voltage: 3 V max
• Test Current: 2.0 mA~200 mA (Varying range correspond to varying test currents)
• Refresh rate: 5 times/s
• Anti interference: Yes
• Automatic frequency tuning: 920 Hz~1080 Hz
• Power supply: DC 11.1 V lithium battery 2600 mAh
• Max input voltage: DC 120 V (between positive side and negative side)
• Response time: 200 ms
• Screen: 3.5″ (480*320 color screen)
• Meter dimension: 170 mm × 115 mm × 65 mm (L*W*H)
• Data interface: Type C, save the testing data and upload it to PC
• Bluetooth: Yes
• Data hold: Auto/Manual data hold
• Data storage: 500 sets
• Measurement judgment function: PASS, WARNING, FAIL judgment thresholds can be preset
• Low battery indication: Yes, 5 battery level
• Auto power off: Yes, around 15 minutes
• Weight (meter): 674.0 g (batteries included)
• Working temperature: -10 ℃～40 ℃; below 80 % RH
• Storage temperature: -20 ℃～60 ℃; below 70 % RH
• Puncture test: AC 3700 V/RMS (between circuit and case)
• External magnetic field: <40 A/m
• Suitable for safety regulations: IEC 61010; CE certificated
• Package weight: 1.305 kg