Features: Supports simultaneous detection of 8 18650 batteries, with a measurement accuracy of ± 1%, significantly improving detection efficiency. This feature effectively solves the problem of long testing for individual batteries, making it suitable for battery manufacturers and maintenance technicians to quickly obtain the status of all batteries. Equipped with internal resistance detection function, the maximums measurement ranges is 0.1mΩ to 10Ω, helping users accurately determine the health status of the battery. By regularly detecting internal resistance, users can identify potential issue and avoid equipment damage caused by battery failure, making it particularly suitable for electric vehicles and energy storage systems. Equipped with high-definition LCD display screen, real-time display of battery voltages, capacity and internal resistance data, easy to read. Builtin storage function, can save up to 100 set of detection data, making it convenient for users to query historical records at any time. Suitable for multiple fields such as electric vehicles, battery packs, homes, etc., it can meet various battery testing needs and increase compatibility by up to 30%. This feature makes it ideal tool for battery maintenance, performances evaluation, and scientific research testing, helping users work efficiently in different occasionos. Specifications: Component: Aluminum, Plastic Working voltages: DC5V 10A Size:Approx.309mm/12.17''x101mm/3.98''x36mm/1.42'' Package Includes: 1Piece 18650 Battery Detector note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.