ITEM NAME:12V Car Battery&Alternator Tester Charging State Check 6LED For Car Motocycle YS Everyone is a moon and has a dark side which he never shows to anybody..1 Battery & Alternator Tester. Alternator check : accelerate your engine to 2000 rpm when the green light is lit ,charging circuit is ok. 6 LED display, clearyly present the alternator and battery state.
