Make Battery Monitor SmarterISDT 6s lipo battery checker cooperating with BattGO technology,only need with XT60i connected,then you can get full knowledge on detail parameters like cells voltage,battery cycles,working parameters etc,easy setup and operation.. Battery Balancer Tester Lipo voltage Checker with advanced auto balancing algorithm,make sure every cell is well balanced.After completion auto into low power mode.. Multiple ConnectionsLipo balance checker RC tester supporting XT60XT60i, XH2.54 1-8S balance lead,XH 2.54 3pin,JST ETC to measure voltage.It also supports LiHv,Lilon,LiFe,NiMhCd,LiPo battery and BEC output measurements.. Multi Function Battery Capacity Testerchecker connecting to your battery,ISDT battery checker BG-8S can become your power bank for RC planedronecar,mobile devices.Support Qualcomm QC 2.03.0,compatible with BC1.2 and Apple devices.Maximum output 12V2A,really a good choose for your battery..

APPLICATION --- The battery testers can be used for testing battery voltage and capacity for electric motorcycle, motorcyclegolf cart, automotive , car, marine, RV, boat, etc.. APPLICABLE BATTERY --- The digital battery monitor is suitable for 7-100V 12v 24v 36v 48v 60v 72v 84v Ternary lithium battery, lead-acid,AGM battery, LiFePO4 battery. Default 12 volt lead acid battery .. PROTECTION ---The smart battery monitor with fully colsed protective shell, dustproof ,IPX7 Waterproof ,It can be used for indoor and outdoor. input reverse connection protection.. INSTALLATION --- The red wire for the positive and the black wire for the negative. The wires length are 15.75 inches,we provide mounting bracket,double-side adhensinve and screw for conventient installing.. Buzzer AlarmTemperature--- The battery monitor can set low and high voltage buzzer alarm and short pressMkey can switch voltage and temperatureCelsius.. Power-off Memory--The battery tester with power-off memory function. it can retain settings when power is removed.. Waterproof Level--IPX7 waterproof,full closed shell and it can be used for outdoor and humid environment.. Note--After getting the product, Must be set according to the instructions, otherwise the capacity of battery will always show 100.

Multiple measurement connections Support XT60XT60i, 2-8S balance, to measure voltage. Support LiHv, LiPo, Lilon, LiFe, NiMhCd battery and measurements.. Make battery smarter Cooperating with BattGO technology, only with XT60i connected and you can get full knowledge on detail parameters on your battery. Easy to read cells voltage, battery cycles, working parameters and fast set to your preferred settings. Read more on BattGO.. Auto balancing cells voltageThe battery tester with balancer function helps to optimize your batteries performance and extend the overall lifespan by ensuring the individual cells are balanced. Advanced auto balancing algorithm, make sure every cell is well balanced. After completion auto into low power mode.. Powerful portable charging function Connecting to your battery, BG-8S can become your power bank for mobile devices. Support Qualcomm QC 2.03.0 compatible with BC1.2 and Apple devices. Maximum output 12V2A.. Receiver signal test and protocol analysis With standard 3 pin plug, BG-8S can detect BEC output voltage. BG-8S also supports multiple protocol analysis including PWM, PPMS.BUS and etc. With future firmware upgrades more Protocol analysis will be supported..

1 Accuracy MeasurementShunt-type monitor design provides much more accurate real-time voltage and current draw measurement.. Protect the batteriesWith High and low capacity alarm functions, our battery monitor with shunt will alarm, and backlight and voltage value will flash simultaneously to protect the batteries from getting over-discharged.. Fit for all batteryThe batter tester is compatible with various battery types, including Lead Acid AGM, GEL, Lithium Iron Phosphate, Lithium-ion, Nickel-metal hybrid. compatible with batteries operating at 12 volts, 24 volts, and 48 volts.. Easy To readDisplays multiple electronic parameters, including Voltage, Current, Consumed Power, Battery Capacity, and battery degradation rate with a customized brightness high-definition Backlight Display.. Easy to InstallTransparent shunt holder makes the battery tester easier to mount the shunt. And the 20ft Shielded cable allows you to monitor the battery status from a distance..

MULTI PURPOSE USE- can be used to test different type of household batteries like AA, AAA, C, D, 1.5V,9V and 1.5V button type. REQUIRE NO BATTERY- activated by the battery being checked, no battery needed for operation. SIMPLE BUT EFFECTIVE- compact size and lightweight, portable effective battery tester, a must buy for anyone who uses regular or rechargeable batteries on a regular basis. EASY TO USE- identify battery status simply by the analog display needle, good green, low yellow, and replacerecharge red. NOTE 1. You can simply test battery voltage to determine whether the capacity of the battery is low or high. It won't directly detect the battery capacity precisely 2. Don't forget The Battery Tester is activated by the battery being checked. Keep test times as short as possible to avoid unnecessary battery drain.. Package Include 2Pcs Battery Tester NOT INCLUDED ANY Batteries.

Upgrade VersionNew lipo battery tester with backlight.. It can be used as Servo tester to test standard and narrow servo.. Display Mode Battery cell voltages, Total Voltages, Lowest cell voltage, Highest cell voltage, Voltage gap between highest cell voltage and Lowest cell voltage.. Support Battery TypeLiPo, LiFe, Li-ion, NiCd, NiMH,Battery Voltage Test Precision 0.001V.. Easy to Use,perfect for checking voltages before parallel charging..

Multi-purpose battery meter - The Tenergy 5-in-1 cell meter estimate voltages for LiPoLiFePO4Li-ion 2-7 cells packs and NiCd NiMH batteries for TX and RX 4-7 cells. The battery capacity checker requires no additional accessories and is powered by the testing battery pack to quickly evaluate the pack's capacity.. Battery discharger - At the discharge rate of 180mA, the battery balancer discharger can discharge lithium-based battery packs to an adjustable threshold. By discharging your battery prior to charging will improve the runtime of your battery.. Balances batteries - The battery tester with balancer function helps to optimize your batteries performance and extend the overall lifespan by ensuring the individual cells are balanced.. Internal resistance tester - For lithium-based battery packs, the battery internal resistance tester function will display the internal resistance of each individual cell. Use the battery checker tester to evaluate the health of your battery pack and decide when to discard or replace it.. ECSServo PPM tester - The Servo tester supplies a reliable PPM signal to test and adjust your servo motors..

Test various sized batteries - A versatile digital battery tester that works for a variety of sizes from AA, AAA, C, D, 9V, CR123A, CR2, CRV3, 2CR5, CR-P2, and even button cell batteries as well.. Battery health analyzer - Quickly find out how much power is left in your battery. One of the few battery checkers with an easy to read metering LCD screen. Determine if your battery is poor, weak, or good. Get a longer battery lifespan by not overcharging partially full rechargeable batteries.. Simple and accurate - A precise universal battery checker that is easy to use. Place your test battery into the battery checker to quickly see how much power is left. The included battery provides a reliable and accurate source of energy to evaluate your test batteries.. Reliable tool - The T-333 household battery tester is great for finding out if your everyday devices need new batteries, or if that device is faulty. Check your batteries for things like toys, cameras, camping electronics, remote sensors, flashlights, watches, and or smoke detectors.. Save money reduce waste - With Tenergy's battery health tester, you will no longer guess if a battery is in good condition. Maximize your battery usage by testing for dead batteries and reduce unnecessary waste. Includes one year warranty support..

Battery checker with built-in cell balancing, integrated servo tester and driver, and Spektrum Smart battery connectivity. Qualcomm 3. 0 compatible USB charge port with Quick Charge for compatible Android and IOS devices up to 12v and 2 amps. Easy to read full-color IPS LCD screen withuser-friendly touch interface. Center and test your servo endpoints easily with the integrated PWM output port.

Feature Highlights This 12V battery tester is a reliable tool for vehicle maintenance. It offers quick tests for battery health, voltage, and charge status, along with cranking and charging system tests to assess performance and ensure the reliability of your vehicle. Accurate Testing This car battery tester features advanced crocodile clips for a secure grip, high-quality copper for excellent conductivity, and an intelligent chip for precise diagnostics. It provides 99.6 accuracy, offering reliable data on your battery's condition. For accurate results, ensure correct battery type, standard, CCAAH value, and confirm temperature abovebelow 0C. User-Friendly Design Enjoy effortless testing with an intuitive interface and a large LCD display featuring adjustable contrast and a white backlight for clear readings. Designed for one-handed operation, it prioritizes convenience. Plus, with support for multiple languages, it accommodates diverse users seamlessly. Safety Shield Pro Confidently tackle tests with 4-in-1 safeguards neutralizing polarity reversalshort circuitsovercurrentovervoltage, shielded by 3x-reinforced ABS to block battery damage user risksprecision-engineered for uncompromised equipment performance.. Universal 12V Power Solution Combines global compliance JISENDINSAEBCIGBCAMCAIEC , ensuring reliability for cars, trucks, boats, RVs and more. Compatible with FloodedAGMGELEFB batteries. Note Excludes lithium, 6V8V24V batteries. Work in your language with the BA101 alternator tester, a versatile battery analyzer offering multi-language support for effortless diagnostics, a handy print function to record and share battery health details, and global compatibilityall designed for your convenience, precision, and ease of use. Quick Test Attention Input the correct AH value for accurate results. Incorrect values may inaccurate results. If unsure, use the battery test feature by entering the CCA value from the battery label instead. Note Batteries below 30 AH are not supported. Ensure compatibility before testing.

2023 Upgrade Car Battery TesterANCEL BM200 Bluetooth battery monitor can test all 12V 100-2000CCA lead-acid and lithium batteries, it is the only device on the market that can test these 2 types of batteries. Most importantly, it supports not only cranking and charging system testing, but also alternator and starter testing. So that users can keep track of battery dynamics and provide a comprehensive analysis of battery health, it is one of the most cost-effective battery analyzers.. 1s fast diagnosis, 99.9 accuracyBM200 car battery tester has an average power consumption of 1.5mA, which is extremely low loss to the battery. Bluetooth 4.2 wirelessly connects to the device, enabling faster and more stable data transfer. Notably, it can also display basic battery parameters in real time, including power, temperature and voltage, charging, starting power, etc. You can know everything about the battery to find and solve problems more precisely. It is a must-have testing tool.. Free App, Advanced CustomizationANCEL BM200 supports custom power and voltage correspondence table for DIY users to better detect battery data it is available for iOS and Android, one APP can monitor battery data of 4 devices at the same time to meet the needs of home battery management it is not limited to Russian, Norwegian, German, Japanese, Chinese, English, Vietnamese, also supports language customization, users can set the language according to their needs, without language barriers.. Powerful Data Storage and Car Finding FunctionBM200 load battery tester saves data every 2 minutes and can automatically save 30 days of historical data, including voltage, charge percentage and temperature, etc. It records track, cost and driving habits for each trip, and it can be exported to Excel file for DIY users to analyze battery performance through historical voltage data. it can also automatically record parking location and provide car finding function through navigation.. Safe Reliable, Abnormal AlarmBM200 has safety technologies such as reverse polarity and short circuit protection to ensure the user's personal safety during operation the casing adopts laser process and has IP7 waterproof level Equipped with 3M adhesive to ensure that the product does not shake during testing Most importantly, it has automatic alarm function, which will notify you via APP when the battery fails or the voltage and power are abnormal to reduce the pressure for the user.. Easy to Install, Wide ApplicationIt is very easy to hook-up and the readings are quite accurate using the available app. As long as you can interpret the readings and understand what it's saying this battery checker is a no brainer to have. It supports conventional flooding, AGM flat, AGM spiral, GEL and EFB batteries for cars, trucks, hybrids, suv's, boats, RV's, motorcycles, and even solar power systems. It greatly meets the user's needs for testing different batteries..

Widely UsedANENG battery tester is a versatile tool designed to assess various types of batteries. It can test AA, AAA, C, D, N, 9V, and 1.5V3.7V lithium batteries, as well as CR2032, LR44, and L736 button cells. This compact battery checker is an essential addition to any home electrical testing toolkit. Digital LCD DisplayANENG BT189 is a easy-to-use battery tester features a digital LCD screen that provides clear and accurate readings of your battery's condition, displaying the voltage levels to indicate whether the battery is depleted, performing marginally, or in optimal health. Easy to Use Just insert a battery into the digital battery tester, and it will immediately display whether the battery's voltage is in poor, weak, or good condition. The tester reliably identifies the battery's status, making it ideal for families who frequently use both standard and rechargeable batteries. This helps determine if a battery can still be used or needs recharging, effectively reducing waste. New Battery-Free DesignANENG Household Battery Tester operates without the need for its own power source, instead drawing power directly from the battery being tested, ensuring a longer service life.Note DON'T POWERED BY RECHARGEABLE BATTERY NOR TEST RECHARGEABLE BATTERIES. Compact and Portable ANENG battery tester is lightweight and easy to carry, allowing you to check your batteries anytime, anywhere. Despite its small size, it is robust and offers high precision.

HIGH COMPATIBILITY It is not only suitable for AA, AAA, C, CR123A, D, 9V, N, CR2, CRV3, 2CR5, CR-P2 cylindrical battery testing, but also good for checking a wide variety of button cell batteries. CRISP LCD SCREEN Easy to use analyzer shows what you need to know about your batterys health, it will accurately shows whether the battery is in poor, weak, or good condition of voltage.. QUICK RESULTS Simply place a battery into the decent battery detector, it will shows you quickly the status of your batteries health by the using bars, helps you avoid battery damage from unnecessary recharges. DON'T POWERED BY RECHARGEABLE BATTERY NOR TEST RECHARGEABLE BATTERIES. REMARKABLY COMPACT One of the smallest and lightest portable battery checker. A pocket-friendly compact chassis with an anti-slip finish enables a firm grip in your hand for battery checking.. WHAT YOU GET Dlyfull Universal Battery Tester1x AAA battery included, welcome guide, our worry-free 18-month warranty and friendly customer service. A living assistant helps you save money as well as prolong the lifespan of all your batteries..

SMALL PRACTICAL - Simple but effective battery tester checker for home BT-168 , compact size and lightweight,easy to carry. BATTERY TESTER FOR ALL BATTERIES - The universal battery tester works with standard and rechargeable household batteries AA, AAA, C, D, 1.5V,9V and button type. REQUIRE NO BATTERY TO OPERATE - Easy-to-read ,the analog display needle moves on a color-coded, calibrated scale to quickly identify good green, low yellow, and replacerecharge red battery status. No batteries required.It is activated by the battery being checked. PERFECT FOR HOME USE - Great small battery tester can tell you if your battery is good, low, or needs to be replaced.A must buy for anyone who uses regular or rechargeable batteries on a regular basis. SAVE BATTERIES - You can simply test battery voltage to determine whether the capacity of the battery is low or high. It won't directly detect the battery capacity precisely. This will keep us from wasting perfectly good batteries by throwing out good ones.

HIGH COMPATIBILITY It is not only suitable for AA, AAA, C, CR123A, D, 9V, N, CR2, CRV3, 2CR5, CR-P2 cylindrical battery testing, but also good for checking a wide variety of button cell batteries. CRISP LCD SCREEN Easy to use analyzer shows what you need to know about your batterys health, it will accurately shows whether the battery is in poor, weak, or good condition of voltage.. QUICK RESULTS Simply place a battery into the decent battery detector, it will shows you quickly the status of your batteries health by the using bars, helps you avoid battery damage from unnecessary recharges. DON'T POWERED BY RECHARGEABLE BATTERY NOR TEST RECHARGEABLE BATTERIES. REMARKABLY COMPACT One of the smallest and lightest portable battery checker. A pocket-friendly compact chassis with an anti-slip finish enables a firm grip in your hand for battery checking.. WHAT YOU GET Dlyfull Universal Battery Tester1x AAA battery included, welcome guide, our worry-free 18-month warranty and friendly customer service. A living assistant helps you save money as well as prolong the lifespan of all your batteries..

WHAT YOU WILL GET Dlyfull-B4 Battery Health Tester Checker, 2 Alkaline 1.5V AAA Batteries, Welcome Guide, 12-Month Warranty, and Lifetime 24-Hour Friendly Customer Service.. ROBUST COMPATIBILITY Universal battery tester is compatible with 12 battery types, including 1.2V Ni-MH1.45V Zinc Air1.5V Alkaline3.0V Lithium Manganese3.2V LiFePO43.7V Li-ion6.0V, 9.0V, and 12.0V Alkaline packs ect. It supports AAA AA C SC D N sizes, button cells, CR123A, CR-V3, 2CR5, 23A, 27A, and more, offering versatile compatibility for various applications.. SMART LCD DISPLAYThe battery checker features a sophisticated LCD display screen that showcases the voltage and battery level of the tested battery. The battery level is presented in two formats as a percentage and battery level bar display, providing clear and precise information about the battery's status.. PORTABLE EASY TO USE Cylindrical batteries can be tested using the black negative pin, while button and combination batteries only need to be placed in their corresponding slots for testing. The compact battery analyzer weighs less than 0.36 pounds, making it extremely convenient for carrying and storage.. CHECK BUTTON The battery tester includes a self-check button. Press and hold for about 3 seconds to perform a self-check and view the power status of the batteries powering the device, allowing for timely replacement when necessary.. NOTICE Please use 1.5V AAA alkaline batteries to power this product .

Pro-level 12V 24V Car Battery Tester - The FOXWELL BT705 battery tester is backed by 14 years of automotive expertise and a dedicated support team. It delivers professional analysis for 12V 24V batteries, assessing SOH, SOC, starter, and alternator systems. Compatible with flooded, AGM, spiral, and GEL batteries 100-2000 CCA, it ensures 99.9 accuracy with upgraded copper clamps, secure clip-on leads, and advanced conductance technology.. Professional-Grade Yet User-Friendly - Ideal for battery dealers, 4S shops, mechanics, DIYers, car owners and heavy construction equipment and heavy duty truck trailer, the BT705 suits 24V vehicles like trucks and buses, as well as 12V vehicles like cars, motorcycles, boats, and mowers. Its easy-to-read display and advanced conductance testing deliver precise, reliable results for all users.. Battery Health Check - The FOXWELL battery tester quickly assess overall battery condition with SOH State of Health and SOC State of Charge analysis. Identify issues early with detailed insights, including available power, CCA, cranking voltage, cranking time, alternator output, no-load voltage, and loaded voltage, helping to prevent unexpected failures and unnecessary maintenance.. Cranking Test - Easily test the cranking system by turning on the engine and measuring cranking voltage and time. This battery checker tester helps detect weak batteries before they fail. If the battery shows a normal SOH but wont start the vehicle, check the starter or ignition system for potential issues.. Charging System Test - This automotive battery tester diagnose charging system problems by evaluating alternator output voltage, rectifier diode function, and charging current. Detect potential faults like no output, low output, high output, or excessive ripple to maintain optimal vehicle performance.. Easy to Read - The BT705 features a 2.8 backlit LCD display for intuitive reading in any lighting condition, making it accessible for non-technical users. Its 5.9ft cable offers maximum flexibility for skilled technicians, DIYers, enthusiasts, drivers, and specialized garages alike without asking for help from others. No app is required, and it conveniently remembers the last test result. Comes with a protective case for easy storage and transport.. Important Notes - Ensure positive and negative clips have good contact for accurate results. When testing inside a vehicle, make sure all accessory loads are cut off, the key is on the OFF position and the doors are closed. Follow the instruction on the screen to do the charging test and cranking test..

G-Tech Smart Lipo Charger - Manual setting is no longer requiredGens ace Imars D300 Dual Channel Charger built-in Smart Chip, it will automatic identify G-Tech smart battery information, automatic charging, automatic stop when fully charged.. High Power ChargingThe power rate is 300W 2 channels, the maximum charging current is 16A, the charging current is adjustable, and the use and operation are simple 7 operating modes of the products include charge, discharge, balance, storage, ExtDischarge, SyncCharging, digital power supply.. Max SafetyGensAce Lipo Dual Charge Discharger Charger with Advanced safety features and UL94-V0 Flame Retardant Grade. During the charging process of the product, the current task total voltage, chargingdischarging current, working time and other information can be displayed in real-time through the display window.. ParameterInput Voltage AC100-240V DC7-30V Output Voltage DC 130V Max. Discharging Power 15W2Main port 6W2, Balance port 9W2 Maximum Charging Power 300W2 DC 350W2 Charge Current 0.1-16A2 Discharge Current 0.13A2 Cell Balancing 16S Display Type 2.4 inch IPS LCD Display Supported Battery Chemistries LiPoLi-ionLIHVLiFe 16S NiMHCd 116S. PackageGens ace iMars D300 Dual Charger, AC Input Cable XT60-T adapter2 XT60-EC5 adapter2 XT60-EC3 adapter2 use manual.

Compatible device NiCd, NiMH, LiPo, LiFe, Li-ion. Battery Type NiCdNIMH,Li-Po,LiFe,Li-Ion. Cell number NiCdNIMH4-7 Cells,Lithium type2-7 Cells. Size app.8.3cm x 2.5cm3.26'' x 0.98''. Feature Applying to check the batteries.

A MUST HAVE TOOL IN YOUR GARAGE - With up-to-date testing technology, it provides a quick reading to determine whether a vehicle battery needs a jump or replacement and also the output status of the alternator. All you have to do is log in and play. Save your time and money.. BATTERY HEALTH CONTROL - Applied with the latest test algorithm, the tester will analyze the battery and get the results in seconds, including health status, charging status, internal resistance and test conclusion mediocre, good, excellent. All types of 12V 100-2000CCA lead acid batteries can be tested.. START AND CHARGE SYSTEM TEST - Test the starting voltage of the alternator when starting the engine to see if it is low or under normal conditions. Check the continuous power of the alternator when the engine is running to see if the alternator provides adequate power to the battery and electrical system.. Real Time Wave Display Data Printing - When you need more details about the performance of your battery or alternator when working, you can use the wave viewing function to monitor the output curve in real time. It gives you all the detailed changes of the output.. 3 inch color LCD screen and 9 languages supported - The 3 inch color LCD screen 240 x 320 pixels is user-friendly and easy to read. Give you a more comfortable viewing experience with every inspection. 9 languages supported - English, Spanish, French, German, Italian, Russian, Portuguese, Chinese and Polish..

Test the working state of lithium battery. Protect the battery from overcharging or overdischarging.. Just plug into the balance plug and the LED will cycle through the individual cell voltages as well as list the total voltage.. When the voltage is below the set value, it will buzzer with red LED light, pre-set value 3.3V. Push the key which can change the voltage setting and save.. Easy to use - works with any 1-8S LipoLi-IonLiMnLi-Fe RC drone battery. Protect the battery from overcharging and overdischarging Just plug into the balance plug and the LED will cycle through the individual cell voltages as well as list the total voltage. Super loud alarm sound makes it easier to find your drone. Package5Packs 2in1 1-8s Lipo Li-ion Battery Voltage Tester Check.

When the Voltage is Below the Set Value,It Will Buzzer with Red LED Light,Pre-set Value 3.3V.Push Key which Can Change the Voltage Settings and Save. 5PCS 1-8s Lipo Battery Voltage Tester, Low Voltage Alarm Mode for 2-8S, Function of Checking Your Lipo Cells Voltage. Voltage Display Function and Low Voltage Alarm FuntionNoteWhen the voltage is lower than the alarm value, it will always ring.And when the product of the measured is unpluged, the alarm will stop.. Super loud alarm that sound makes it easier to find your drone.. Display Mode Battery cell voltages, total voltages, lowest cell voltage, Remaining battery capacity..

High quality, safe and durable. Lightweight and compact with excellent performance. Cell Number NiCd NiMH 4 - 7 Cells, Lithium Type 2 - 7 Cells. Display Mode Battery cell voltages, Total voltages, Lowest cell voltage, Highest cell voltage, Voltage gap between highest cell voltage and lowest cell voltage, Remaining battery capacity. Applies to check the batteries, simple and convenient to read your cell voltage. Use for LiPo LiFe Li-ion NiMH Nicd battery.

Lipo Battery Checker Cell Number NiCd NiMH 4 - 7 Cells, Lithium Type 2 - 7 Cells. Useful Lipo Battery TesterHigh quality, safe and durable. Lightweight and compact with excellent performance.RC Battery Checker makes battery voltage more balanced.. Lipo Battery TesterVoltage Checker Use for LiPo LiFe Li-ion NiMH Nicd battery Applies to check the batteries, simple and convenient to read your cell voltage.. Display Mode Battery cell voltages, Total voltages, Lowest cell voltage, Highest cell voltage, Voltage gap between highest cell voltage and lowest cell voltage, Remaining battery capacity.. Compatible device NiCd, NiMH, LiPo, LiFe, Li-ion.Applying to check the batteries. Product Size 8.4x5x1.6cm. Product Weight 45g.

Test the working state of lithium battery. Protect the battery from overcharging or overdischarging.. Just plug into the balance plug and the LED will cycle through the individual cell voltages as well as list the total voltage.. When the voltage is below the set value, it will buzzer with red LED light, pre-set value 3.3V. Push the key which can change the voltage setting and save.. When the voltage is below the set value,it will buzzer with red LED light,pre-set value 3.3V. Easy to use - works with any 1-8S LipoLi-IonLiMnLi-Fe..