TF03K can test the voltage, current and capacity of lead-acid/lithium-ion battery, and display them with intuitive battery symbol and percentage. Users can know the state of battery in time. TF03K has function of memory.This battery indicator is suitable for mobile and portable equipments,ups,electric vehicles,ebike, battery cars,balance cars,cleaning machines and so on. TF03K is different with voltage type battery indicator, TF03K has high accuracy and high reliability. Working voltage:10.0V-120.0V Working current:0A-750.0A.syi