Mini Battery Level Indicator Module 1S 2S 3S 4S Series Battery Meter Lithium Battery Percentage Display Module

Product Features:1. Supports 1S–4S lithium battery series connections, offering excellent compatibility2. Accurately displays battery percentage, providing an intuitive and easy-to-read display3. Ultra-compact design, allowing for easy integration into compact devices4. Low-power operation, extending the device’s standby time5. Manual series configuration switching for ease of useProduct Specifications:Maximum Withstand Voltage: 36V ±10Voltage Measurement Range: 3–17.29VBattery Capacity: UnlimitedBattery Level Display: 0%–100%Measurement Accuracy: ±1%Average Operating Current: 7mA ±0.3mARefresh Rate: 0.3 seconds per cycleOutput control: NoneReverse polarity protection: None (positive and negative terminals must not be reversed, otherwise the module will be damaged)Compatible battery range: The module is compatible with all lithium battery packs consisting of 1 to 4 cells in series or parallel configuration with a rated voltage of 3.7V (full charge voltage 4.2V); this includes 14500, 18650, 21700, polymer lithium batteries, etc., of any capacity and sizeModel with Smart Button:Features a smart button. Upon power-up, the device first detects the number of battery cells; at this point, it defaults to Mode 0. The display illuminates after approximately 1 second and shows the current battery percentage. A short press (within 3 seconds) of the smart button serves as the on/off function, whilst a long press (over 3 seconds) switches modes, allowing you to switch to Mode 1. After switching to Mode 1, the display defaults to off. A short press (less than 3 seconds) of the smart button immediately turns the display on, and the value rises from 0% to the normal charge level within approximately 1 second (as the button functions are shared, the filter capacitor requires charging after being activated); the display then automatically turns off after a 3-second delay. A long press (>3 seconds) serves as the mode-switching function, allowing you to switch back to Mode 0, and the cycle repeats;Package Contents:Module *1