Battery Analyzer accurately tests the condition of 12V lead-acid starter batteries including Wet, Maintenance Free, Ca/Ca and Gel. Easy to use it provides fast and easy to understand results. The easy to read display gives clear information on the condition of the 12 V lead-acid battery and advises what action is required. With no need to disconnect the battery from the vehicle, the patented technology used by the Battery Analyzer is safe for the user and vehicle electronics. It is reverse polarity protected, creates no battery loads, heat or sparks.