This battery tester allows for easy analysis of battery status, viewing battery state of charge and detecting faults. This automotive battery tester works with all 12V battery charging systems including regular flooded, AGM flat, AGM spiral and GEL batteries for cars, forklifts, hybrids, pickups, boats, RVs, motorcycles and travel trailers. 

• LED display indicates condition, for 12V battery only. 

• Alternator state check, battery state check, check before charge and overload display. 

• Alternator check : accelerate your engine to 2000 rpm when the green light is lit ,charging circuit is ok. •Battery check: indicate the percentage charging in the battery . 

• Charger check: when green light is lit, charging is complete. 

• 3 LED indicators show battery condition: Full, Middle, 

• 2 LED indicators check status of alternator state: Fault, Good 

• 1 LED indicator check before charge 

• 14" long cable Direct plug-in with any 12 volt cigarette lighter port system 

• Compact design for easy storage