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 world's 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 Replace 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 (percent ) 5. Battery Cranking Test, load test 6. Battery Charging Test, Ripple Test 7. Support battery ripple test and review 12V Battery Tester Features: 1. Fast and smooth running speed with STM-32 chip set hardware 2. Accurate test results, using high precision amplifier and calibrated by professional battery testing tool, BST100 reading accuracy up to 99percent . 3. Wide testing range cover from 100-2000 , 3-220 AH, best in the market. 4. Industry initiative graphical battery voltage real time monitoring, can be analysis battery data more accurate. 5. Unique battery results display in percentage and meter mode. Colour:Red Material:ABS Package Contents: 1 x Car Battery Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.