Check the listing for details. UNIT UT677A Battery Internal Resistance Tester Volt Temp Meter Bluetooth PC APP. Condition: New. Listed at 341.82 USD. UNI-T UT677A Battery Internal Resistance Tester Volt Temp Meter Bluetooth PC APP Connection The universal rechargeable battery internal resistance tester is referred to as the battery internal resistance tester. It is used to measure the internal resistance, voltage and temperature of rechargeable batteries such as lead batteries and lithium batteries to determine the health of the battery. It can also be used as a measuring instrument for measuring electrolytic capacitors. ESR parameter meter. UT677A uses the AC 4-terminal test method to measure the internal resistance of the battery, which can measure the correct measurement value without being affected by the contact resistance between the test line, the terminal and the battery electrode. It also has functions such as data storage, data access, alarm, and automatic shutdown. The whole machine is high-grade and beautiful, with wide measuring range, high resolution, convenient operation, easy to carry, accurate, reliable, stable performance, and strong anti-interference ability. It is an indispensable instrument for battery production, battery installation, equipment production, equipment maintenance and other scenarios. The universal rechargeable battery internal resistance tester is controlled by a microprocessor, and the internal 16-bit ADC can accurately detect the internal resistance, voltage and temperature of the battery. It is characterized by measuring without stopping the UPS system, using AC low-resistance measurement and noise reduction technology, without stopping the normal operation of the device under test, and measuring under the running state, which greatly shortens the test time. At the same time, it has the functions of data storage, histogram display, data upload, computer, mobile phone, tablet and other smart devices Bluetooth connection for wireless measurement and data access. Features Battery internal resistance, battery voltage, temperature measurement Precision 23℃±5℃, below 75%rh Power supply DC 3.7V lithium battery Resistance resolution 1 u Ω Voltage resolution 1 mV Temperature resolution 0.1℃ Measuring range Internal resistance measurement：0.000mΩ~3.100 Ω （4 ranges configuration） Voltage measurement：0.000V~±71.00V （2 ranges configuration） Temperature measurement：-10.0℃~60.0℃（Single range configuration） Maximum input voltage DC 70V（+Between measuring terminal and-measuring terminal）、No input communication Measurement method Internal resistance measurement: 1KHz AC 4-terminal test method, open-circuit terminal voltage 3V max Measurement current: 2.0mA~200mA (different measurement currents in different ranges) Temperature measurement: NTC temperature sensor (10KΩ at 26℃) A/D conversion method: successive approximation type Display update frequency: 5 times / second Response time 200ms Measure time About 2 seconds LCD size 70.1mm×52.6mm / 3.5 inches (320*240 resolution 16-bit true color screen) Instrument size 190mm×121mm×51mm USB interface The stored data can be uploaded to the computer, saved and printed Bluetooth connection Yes Hold and store function Manual retention and storage, automatic retention and storage Measurement judgment function Pre-set PASS, WARNING, FAIL judgment thresholds battery voltage The battery level is displayed in 5 bars, reminding to charge in time when the battery voltage is low Automatic shut-down There is no operation when the machine is turned on, and it will be turned off automatically after about 15 minutes (can be turned off in the settings) Power consumption 300mA MIN / 500mA MAX Quality 480g 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) Resistant to pressure AC 3700V/RMS (between circuit and case) External magnetic field ＜40A/m External electric field ＜1V/m Shipping policy 1. We will send out your order within 3 working days, the tracking number will be updated to you once your order has been shipped. Standard shipping will take 8-12 business days for delivery and expedited shipping takes 2-7 business days. If there is any delay, it may be caused by bad weather or custom inspection which is not in our control, but don't worry, we will keep to follow your order until you receive it. 2. We try our best to make you get desired products as soon as possible. In case you receive wrong products, please contact us timely for exchange or refund. If damaged, please refuse to sign and send us the message ASAP. 3. Shipping cost does not include DHL/FedEx /UPS Remote area service charge , buyer will afford if your address belongs to it ,it is USD45 for it . Warranty&Return Policy: 1.-We encourage all customers to communicate with us through eBay messages. If you have any questions or comments whatsoever regarding our products function or listing questiones, we are waiting to hear from you 2.-A 1 year warranty is offered for this product.If the product malfunctioned under proper usage per instructions manual within the warranty period, please contact us to obtain shipping instructions and send it back at your shipping costs. Import Taxes or Duties 1.- Import duties, taxes and other charges happened in your side are not included in the item price. These fees not included in our price. 2.- Please check with your country's importing policy about the duties and charges before purchase. Feedback 1.- As your feedback is very important to our development, we sincerely invite you to leave positive feedback for us if you are satisfied with our product and service. 2.- Please contact us before you leave a neutral or negative feedback, we will try our best to solve the problems.