The Ancel BST100 battery tester product is used for lead-acid starter batteries, as well as checking the following battery conditions: starting, charging, and load. With good design, easy operation, accurate readings, and complete functions, this tester provides readings via a large LCD and tips with sound and light during testing. It uses the 4-wire Kelvin method to complete the collection of a series of complex data to calculate each test data with a built-in precise circuit and improved digital processor. In addition, some circuit improvements including polarity protection, overvoltage protection, and loose wire detection ensure safety and convenience during testing. So this is the best tool in the fields of battery sales, vehicle repair, and battery inspection in equipment systems associated with lead-acid starter batteries. ANCEL BST100 Function: 1. Identify battery status Good or Replace 2. Check battery capacity - Cold Cranking Amps (CCA), DIN, EN, and IEC information relative to the battery rating. 3. Check internal resistance value (Ohm) 4. Display battery life in percentage (%) 5. Battery starting test, load test 6. Battery charging test, Ripple Test 7. Support battery ripple test and review test data BST100 12V Battery Tester Features: 1. Fast and smooth operating speed with STM-32 chip set hardware 2. Accurate test results, using high-precision amplifier and calibrated by professional battery test tool, BST100 reading accuracy up to 99%. 3. Wide test range covers from CCA 100-2000, 3-220 AH, best on the market. 4. Industry-initiative graphic battery voltage real-time monitoring, can analyze battery data more accurately. 5. Unique battery result display in percentage and meter mode. 6. Test all automotive lead-acid starter batteries, including regular flooded, AGM flat plate, AGM spiral, and Gel batteries, etc. 7. Polarity reverse connection protection, reverse connection will not damage the tester or affect the vehicle and battery. 8. Test the battery directly with power loss, no need to fully charge before testing. 9. Test standards currently include the world's majority of battery standards, CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, GB. 10. 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 (AGM) and GEL EPB cell BST100 Supported Languages: English, French, German, Russian, Spanish, Italian