... very low standby power consumption, heat a small, high stability,Short circuit protection. overheat protection. all by ... no open circuit, no bad led indicator ,no high voltage, no low voltage, no output, etc 3 ... to make sure every unit with power, no high voltage, no low voltage, no bad led indicator ... good quality before arrive at our customers. 19V 5.5*2.5 dc connector universal laptop notebook ac ...