Sealey-BT01-Digital-Battery-Alternator-Tester-12V-Sealey-BT01-Compact-device-which-accurately-tests-battery-cranking-and-alternator-No-heat-no-sparks-and-no-misdiagnosis-Just-key-in-the-battery-rating-from-the-top-of-the-battery-and-results-are-displayed-on-an-LED-control-panel-No-internal-battery-and-will-test-batteries-with-a-residual-charge-of-just-7V-Sealey-BT01-Digital-Battery-Alternator-Tester-12V