Cartman 12V Car Battery &amp; Alternator Tester - Test Battery Condition &amp; Alternator Charging (LED indication)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>LED display indicates condition， for 12V battery only.</li><li>Alternator state check， battery state check， check before charge and overload display.</li><li>Alternator check : accelerate your engine to 2000 rpm when the green light is lit ，charging circuit is ok.</li><li>Battery check: indicate the percentage charging in the battery .</li><li>Charger check: when green light is lit， charging is complete.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41GcxH0AYML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51P%2BV4Ehb7L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51uxHEP9bML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/516D-tCTVsL.jpg" noproxy>