The device provides two operation modes: Panel and Software. After installing the specified software, the device can be managed and operated through the computer: charge-discharge setting, data sampling, test report import and export, test data analysis, charge-discharge curves drawing. One computer can manage multiple devices simultaneously through a switch.                                                                                                                                                                                                                       .                                                                                                                                                                                                                                    It is a high-precision specific instrument suitable for electric vehicle & battery manufacturers and its dealers to test the performance of battery pack. And it can be widely used in battery testing and maintenance, production, sales and after-sales service，lab battery R & D as an efficient & intelligent battery testing and maintenance equipment.