... 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 ... quality before arrive at our customers. 90W 19V 4.74A 7.4*5.0 dc connector universal universal laptop ac adapter ...