- Ultra-thin design features a clear electricity display with 5 intuitive LED indicators, making it easy to read and visually appealing. - Simple operation: Connect the display board to the positive and negative terminals of the battery under test. A quick press of the red button activates the LED lamp to show real-time battery power levels. - Energy-efficient: Release the button, and the LED will automatically turn off after a 3-5 second delay, ensuring no power is consumed when idle. - Voltage Specification: Designed for 3.7V batteries, with a full charge indicator at 4.2V. Use Scenarios: - Ideal for quickly assessing the remaining power in rechargeable batteries for handheld devices, ensuring you are never caught off-guard by a dead battery. - Perfect for hobbyists and professionals alike, this tool can be used to test battery health in drones, cameras, or other electronic equipment. - Beneficial for maintaining battery performance in remote controls or emergency devices, ensuring they are always ready when needed. This battery display provides clarity and confidence in your device's power management, ensuring optimal performance at all times.