The GYS 025738 PBT 824 is a professional electronic battery tester designed for comprehensive analysis of 6V and 12V lead-acid, GEL, AGM (flat, spiral, Start&Stop), and EFB batteries. It also performs a full diagnostic of 12V and 24V starter and alternator charging systems. Featuring a large backlit LCD display, it provides instant and accurate results, including battery voltage, available starting power (CCA), and battery health status. The tester is protected against polarity inversions and overvoltages, ensuring safe and reliable operation. It is ideal for workshops and maintenance professionals requiring precise battery and charging system diagnostics.