Fangrui Product Details Test All Automotive Cranking Lead Acid Battery, Including Ordinary Lead Acid Battery, Flat Plate Battery, Spiral Battery, And Gel Battery, Etc. Polarity Reverse Connection Protection, Reverse Connection Not Damage The Tester Or Affect The Vehicle And Battery. Directly Test The Battery With Loss Of Electricity, No Need To Full Charge Before Testing. Testing Standards Include Currently The Worlds Majority Of Battery Standards, , Bci, Ca, , , Din, Iec, En, Sae, Gb. Bst100 Is Used To Test A Wide Range Of 12v Batteries (starting [sli], Deep Cycled And Marine) Of Wet (flooded), Vrla Or Maintenance Free (mf), Sealed Maintenance Free (smf), Absorption Glass Mat () And Gel Epb Cell For Bst100 Function: 1. Identify Battery Status Good Or 2. Check Battery Capacity - Cold Cranking Amps (), Din, En And Iec Information Relative To Battery Rating. 3. Check Internal Resistance Value (ohm) 4. Display Battery Life In Percentage (%) 5. Battery Cranking Test, Load Test 6. Battery Charging Test, Ripple Test 7. Suppo