Digital-Start-Stop-Battery-Alternator-Starter-Tester-12-24V-Sealey-BT2011-Robust-&-simple-to-use-design-offers-a-full-in-vehicle-diagnosis-of-the-vehicle-battery-starter-motor-&-alternator-in-seconds-Professional-tool-supports-all-12V-batteries-including-standard-Lead-Acid-VRLA-GEL-plus-AGM-&-EFB-found-on-all-Start-Stop-vehicles-The-in-vehicle-test-mode-allows-diagnosis-of-battery-health-state-of-charge-internal-resistance-cranking-voltage-&-a-comprehensive-charging-system-v