4PCS Li-ion Battery Capacity Voltage Meter Tester 1S 3.7V 15mA Line Length 14.5cm 40x15x2.7mm Lithium Battery Capacity Indicator Module

Specifications: 1 string of ternary lithium battery 3.7V fully charged 4.2V, working current: 15ma. Real-time battery charge display: Offers a straightforward and clear real-time battery level readout with 5 LED indicators, allowing easy monitoring of lithium, lead-acid, and LiFePO4 batteries in electric vehicles and other devices. Compatibility: Works with various battery types such as lithium-ion, lead-acid, and electric vehicle batteries, providing versatility and broad application for different electronic equipment. Compact and ultra-thin design: Featuring dimensions of 40x15x2.7mm and a wire length of 14.5cm, this slim, space-saving design fits effortlessly into tight spaces while preserving a sleek, professional appearance. Easy to use and power-efficient: Just attach the indicator's positive and negative leads to the battery, press the red button for real-time status, and benefit from energy-saving features as the LED automatically shuts off after 3-10 seconds