The ELT500 EV Battery Pack Airtightness Tester is a compression testing device utilized to assess the air compression rate and uphold pressure within the inner cavity/surface of the battery or product. This is crucial for preserving the sealing effectiveness of the battery pack, ensuring it operates efficiently within specified parameters for electric vehicle efficiency. Moreover, the ELT500 EV is suitable for use with motor controllers, voltage distribution boxes, compressors, and other components.