Features: Ultra-thin power display, 5 LED indicators, the display is more intuitive and more beautiful. It can be used in a wide range of applications, such as lithium batteries, lead-acid batteries, lithium iron phosphate, and electric vehicles. Li-ion Battery Level Display Parameter: (2% error should be acceptable) 1. battery voltage > N*3.2V, 1 LED lights up (note:N = battery cell number) 2. battery voltage > N*3.4V, 2 LED lights up 3. battery voltage > N*3.6V, 3 LED lights up 4. battery voltage > N*3.8V, 4 LED lights up 12V Lead Acid Battery Level Display Range:(4S Lithium iron phosphate battery can be acceptable) 1. battery voltage goes over 11V, 1 LED lights up 2. battery voltage is over 11.6V, 2 LED lights up 3. battery voltage is over 12.3V, 3 LED lights up 4. battery voltage is over 13V, 4 LED lights up 3.7V lithium battery, full charge 4.2V 2S lithium 7.4V battery, full charge 8.4V 3S lithium 12V battery, full charge 12.6V 4S lithium battery, full charge 16.8V 12V lead acid storage battery, 12V car battery Instructions: 1. 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 with your finger and the LED light will illuminate. Display the real-time battery power. 2. Release your finger, the LED light will be off after 3-5 seconds, and it will not consume power when it is static. 3. With reverse connection function, even if the positive and negative reverse will not burn, adjust it. Tips 1. A total of 5 small lights, display power, suitable for reverse converter lithium battery power tips 2. 3.7V kind with 1pcs red power Indictor ,4pcs green battery Indictor ；the others with 1pcs red power Indictor ,4pcs blue battery Indictor Specification: Types: 3.7V 1S lithium battery, 2S lithium battery, 3S lithium battery, 4S lithium battery, 12V lead acid battery(12V Car Battery) Material: PCB board Dimensions: 40x15mm/1.57x0.59inch Cable Length: 120MM Color: Black Quantity: 1 Pc Package includes: 1 x Battery Capacity Indicator Module Ultra-thin power display, 5 LED indicators, the display is more intuitive and more beautiful. It can be used in a wide range of applications, such as lithium batteries, lead-acid batteries, lithium iron phosphate, and electric vehicles. Li-ion Battery Level Display Parameter: (2% error should be acceptable) 1. battery voltage > N*3.2V, 1 LED lights up (note:N = battery cell number) 2. battery voltage > N*3.4V, 2 LED lights up 3. battery voltage > N*3.6V, 3 LED lights up 4. battery voltage > N*3.8V, 4 LED lights up 12V Lead Acid Battery Level Display Range:(4S Lithium iron phosphate battery can be acceptable) 1. battery voltage goes over 11V, 1 LED lights up 2. battery voltage is over 11.6V, 2 LED lights up 3. battery voltage is over 12.3V, 3 LED lights up 4. battery voltage is over 13V, 4 LED lights up 3.7V lithium battery, full charge 4.2V 2S lithium 7.4V battery, full charge 8.4V 3S lithium 12V battery, full charge 12.6V 4S lithium battery, full charge 16.8V 12V lead acid storage battery, 12V car battery Instructions: 1. 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 with your finger and the LED light will illuminate. Display the real-time battery power. 2. Release your finger, the LED light will be off after 3-5 seconds, and it will not consume power when it is static. 3. With reverse connection function, even if the positive and negative reverse will not burn, adjust it. Tips 1. A total of 5 small lights, display power, suitable for reverse converter lithium battery power tips 2. 3.7V kind with 1pcs red power Indictor ,4pcs green battery Indictor ；the others with 1pcs red power Indictor ,4pcs blue battery Indictor : Types: 3.7V 1S lithium battery, 2S lithium battery, 3S lithium battery, 4S lithium battery, 12V lead acid battery(12V Car Battery) Material: PCB board Dimensions: 40x15mm/1.57x0.59inch Cable Length: 120MM Color: Black Quantity: 1 Pc