Battery Tester – WL-072 WELLHISE BT-200 (KEY-777) is a device used to evaluate and test the condition of various types of batteries. The BT-200 model is designed for testing batteries typically used in automotive, marine and industrial applications. This battery tester is usually equipped with a large LCD display and easy-to-use buttons. It can measure voltage, capacity, resistance, current discharge and other important parameters of the battery. In addition, some models may have self-test functions or printer capability, enabling easy recording and reporting of measurement results. WL-072 WELLHISE BT-200 (KEY-777) Battery Tester has a durable construction and is suitable for long-term use. It can be used by both professional automotive technicians and amateur users.