... 6.5V closed,higher than 8.5Vopen10,Short-Circuit protection:auto protect 0.5 second after ... short-circuit11,Open-Circuit protection:auto protect 0.5 second after ... 1) 5 hours continuous working aging test2) Connection circuit protection test.3) Lack of voltage protection test. ... boot test. 8)Polarity protection test. 9)Short circuit protection test. E.Certification :CE,E-mark and ...