DLG DI-226 BATTERY LOAD TESTER WITH OVER VOLTAGE INPUT PROTECTION PLUS 4-WIRE INTERNAL RESISTANCE TEST test the no-load energy, the on-load condition, the internal resistance of the battery and the charging system conditions of 6V and 12V lead-acid battery 32-bit high-end micro control unit for computation operatioon to tell automatically the different voltage of the battery at the same time and the charging status available for most of the lead-acid storage battery, electric vehicle battery, UPS battery, solar energy storage battery, automotive battery , marine battery. Ah value is required to enter into the meter (CCA is unavailable). over voltage input protection and reverse polarity protection poor contact and over temperature prompt