Comprehensive battery testing solution: Designed for testing of 18650 lithium batteries, it can accurately measure battery capacity and internal resistance. The tester uses DC 12V input and is suitable for various testing environments Advanced safety features: The device is equipped with multiple protection functions to safe and reliable operation, protecting the tester and battery from potential damage Automatic saving: With an advanced function setting menu, you can expand and transform functions in many aspects, all parameters are automatically saved, and it is designed with a power-off automatic memory function, so you don't have to worry about power failures in the middle Integrated advanced calculation function: You can directly get the battery energy (Wh) and battery discharge platform voltage without the help of a computer Efficient and reliable: It is an ideal choice for professionals and amateurs. It provides a reliable tool for comprehensive battery management and can improve the service life and performance of 18650 lithium batteries Power supply voltage: DC12V (DC11-14V) Working current: no more than 35mA Battery input voltage: no more than 8.5V Discharge current error: less than 1%+2mA Voltage measurement error: less than 1%-3D Statistical range: 80.00Ah Different batches may have differences in product appearance, printed words, and accessory colors, which do not affect use Colour:Green Material:PCB Package Contents: 1 x Lithium Battery Capacity Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.