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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4.1 ★★★★★
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Product Reviews
★★★★★ 5
Indestructible
Style: Fetch Balls (Pack of 2), Size: 3 inch
These balls are indestructible! We have a lab and a lab mix and they CANNOT damage these balls. They love them for fetch and to just chew on them (slightly squishy, but NO damage). Best toys we have bought for them.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Great trial set. Just be careful throwing the orange one!
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Blue isn't that easy to see in the yard
White charges with bright light/UV and is truly a game changer for night-time fetch. Both dogs clearly favor it.
Orange is easy to see in the grass at day
They're 3 different weights as well, so double trial. I prefer medium for my big dogs, though light performs well too
The orange is HEAVY and unyielding. Do NOT throw it with a ball thrower. It could damage your house or knock your dog out. Seems tough though.
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Reviewed in the United States on January 16, 2026
★★★★★ 3
Not as good as chuck it anymore
Style: Fetch Balls (Pack of 10), Size: 2.5 inch
I have bought these before and the where just like the chuck it balls. These are not those balls. The are lighter and my dog has already cause damage to one
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Reviewed in the United States on March 16, 2026
★★★★★ 5
Cheap but expected, worked as intended, none of them broke.
Size: 1000 Teaspoons
Seems to be cheap quality but what else can you expect for the price? I needed something cheap that would work for cold foods, and these delivered. They lasted me forever and I didn’t have any break, I just didn’t trust them with super hot foods. I will buy again in a heartbeat though because for everything else they work great. They are small spoons that don’t hold much, bend easily, are really lightweight and I wish they came in portions or wraps because after opening they sat there collecting dust through the hole in the box and so I had to transfer them to a closed container for sanitary purposes. Again though, I didn’t really expect anything else, so I’m happy regardless.
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Reviewed in the United States on September 26, 2025
★★★★★ 5
Great stirring spoons
Size: 1000 Teaspoons
Great price. Cheapest spoons for stirring. Don't expect to eat ice cream with them though. Me happy.
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Reviewed in the United States on May 15, 2026