The BK603B is a Battery Capacity Analyzer manufactured by B&K Precision. This device is designed to measure and analyze lead acid batteries. It uses charging currents up to 10A to test the capacity of the battery, as well as test voltages up to 24V. It also has three current ranges (1A, 10A, and Auto). The BK603B includes a built-in rechargeable NiMH backup battery, so users can test their battery even when a power outlet isn’t available. The device also includes USB, RS232, and LCR connectivity options for data logging and control. Additionally, it features an especially intuitive touch-screen with a simple and clear interface, allowing users to instantly control their tests. The BK603B is widely used in automotive, battery research, and military applications.