... 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 ... in good quality before arrive at our customers. 19V 5.5*2.5 dc connector universal laptop notebook ac ...