Specifications of UT677A Battery Internal Resistance Tester
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Description
UNI-T UT677A+ Battery Internal Resistance TesterSpecifications of UT677A Battery Internal Resistance Tester Function Range Resolution Battery Internal resistance range 0. 000m~3m 1%fs. 20dgt 1u 3. 000m~30m 0. 5%fs. 15dgt. 10u 3. 000m~300m 0. 5%fs. 15dgt. 100u 300m~3 0. 5% fs. 15dgt. 100m Battery Voltage range 0. 000V~7 V 0. 2%fs. 10dgt. 1mV 7 V~71. 00V 0. 2 % fs. 10dgt. Temperature range 10. 0C~60. 0C (single range) 1. 0 0. 1 Accuracy Guaranteed Temperature Humidity 235, <75%rh Features Measuring
| Function | Range | Resolution |
| Battery Internal resistance range | 0.000mΩ~3mΩ / ±1%fs. ±20dgt | 1uΩ |
| 3.000mΩ~30mΩ / ±0.5%fs. ±15dgt. | 10uΩ | |
| 3.000mΩ~300mΩ / ±0.5%fs. ±15dgt. | 100uΩ | |
| 300mΩ~3Ω /±0.5% fs. ±15dgt. | 100mΩ | |
| Battery Voltage range | 0.000V~±7 V/±0.2%fs. ±10dgt. | 1mV |
| 7 V~±71.00V/±0.2 % fs. ±10dgt. | ||
| Temperature range | -10.0°C~60.0°C (single range)/ ±1.0℃ | 0.1℃ |
| Accuracy Guaranteed Temperature Humidity | 23℃±5℃, <75%rh | |
| Features | ||
| Measuring method | 1. Internal resistance measurement: 1KHz AC 4-terminal test method, open-circuit terminal voltage 3V max 2. Measuring current: 2.0mA~200mA (different measuring currents in different ranges) 3. Temperature measurement: NTC temperature sensor (10KΩ at 26°C) 4. A/D conversion method: successive approximation type 5. Display update frequency: 5 times/second |
|
| Screen | 3.5 inches (320*240, 16-bit true color screen) | |
| Response time | 200ms | |
| Measuring time | About 2 sec | |
| USB interface | Read real-time measurement values, read historical measurement records | |
| Bluethooth app | √ | |
| Data hold and storage | 1. Manual hold and storage, automatic hold and storage 2. Up to 5000 set measurement data storage |
|
| Measurement judgment function | PASS, WARNING, FAIL judgment thresholds can be preset | |
| Power | 1. DC 3.7V lithium battery 2. 5-bar display of power, reminding to charge in time |
|
| Power consumption | 300mA MIN/500mA MAX | |
| Automatic shut-down | Around 15 minutes | |
| Weight | 480g (including battery) | |
| Dimension | 190mm×121mm×51mm (L*W*H) | |
| Working temperature and humidity | -10℃～40℃; below 80%RH | |
| Storage temperature and humidity | -20℃～60℃; below 70%RH | |
| Insulation resistance | Above 20MΩ (500V between circuit and case) | |
| Puncture test | AC 3700V/rms (between circuit and case) | |
| External magnetic field | <40A/m | |
| External electric field | <1V/m | |
| Suitable for safety regulations | IEC 61010 | |
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Product Reviews
★★★★★ 5
Perfect firmness
Size: Queen (Mid Loft), Number of Items: 1
This pillow is great! Not too soft, not too firm. Holds its shape.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026
★★★★★ 5
The best Pillow ever!
Size: Queen (Mid Loft), Number of Items: 1
I am a life long latex pillow user! The one i typically use is 150+. This pillow is better and less expensive . It has just enough firmness but still soft . I am a side sleeper and it supports my neck perfectly . I am going to buy three more!
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Reviewed in the United States on December 13, 2025
★★★★★ 5
Comfortable and light weight
Size: Queen (Mid Loft), Number of Items: 1
Perfect. Just what we wanted
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Reviewed in the United States on February 18, 2026
★★★★★ 4
Make sure you're not allergic to latex
Size: Queen (Mid Loft), Number of Items: 1
This pillow is so soft and bouncy! After using it for a couple of nights, I felt that it wasn't high enough for me, as I'm a side sleeper. So I started using it with another thin pillow underneath it. That worked fine and I was happy with it until I started developing itchy skin on my neck, scalp and ears! Now, to be fair, this isn't the pillow's fault! I just didn't know I was allergic to latex! I unfortunately had to return it.
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Great Pillow
Size: Queen (Mid Loft), Number of Items: 1
My husband bought me this pillow - I loved it so much I bought a second one! It is so comfortable and keeps its shape. I would buy again!
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Reviewed in the United States on May 31, 2026