Battery Level Indicator Board, LED, Push Button, for 1S-7S Lithium or 12V/24V Lead-Acid

Features: Using high quality materials, durable Ultra-thin power display, 5 LED indicators, the display is more intuitive and more beautiful With reverse connection function, even if the positive and negative connections are reversed, it will not burn Wider range of use, lithium batteries, lead-acid batteries, lithium iron phosphate, electric vehicle batteries and electric equipment can be used Specification: Allowable error: ±2%; 4-stage power: 25% 50% 75% 100% Working current: 15ma Lead length: 15cm Dimensions: 40x 15x 2.5mm Net weight: 8g Working temperature: -10℃~65℃ ：1S Lithium Battery 3.7V Fully Charged 4.2V ：2S Lithium Battery 7.4V Fully Charged 8.4V ：3S Lithium Battery 11.1V Fully Charged 12.6V ：4S Lithium Battery 14.8V Fully Charged 16.8V ：5S Lithium Battery 18.5V Fully Charged 21V ：6S Lithium Battery Fully Charged 25.2V ：7S Lithium Battery Fully Charged 29.4V Install: Connect the positive and negative terminals of the display board to the positive and negative terminals of the battery under test, press the red button lightly with your finger, and the IED light will light up to display the real-time battery level Release your finger, the LED light will turn off after a delay of 3-10 seconds, and it will not consume power at all when it is static. With reverse connection function, even if the positive and negative connections are reversed, it will not burn, just adjust it Lithium battery display battery parameters: (the following data are reference values, there will be a 2% error range, do not shoot if high accuracy is required) Reminder: ：3.7V lithium battery uses 1 red power indicator and 4 green battery indicators (other voltage ranges are 1 red power indicator and 4 blue battery indicators) ：(Note: N is the number of battery cells) ：The first power indicator is red ：When the battery voltage is greater than N×3.3V, the second blue light is on ：When the battery voltage is greater than N×3.5V, the third blue light is on ：When the battery voltage is greater than N×3.7V, the fourth blue light is on ：When the battery voltage is greater than N×3.9V, the fifth blue light is on