各种电源 3V 4.5V 5V 6V 8.2V 9V 12V,18V,18.5V,19V,24V
* 1000mA以下:used,$5
* 1000mA: $8
* 5V 1A: switching,$8
* 5V 2A: switching,$10
* 6V 1000mA: $8
* 8.2V 1.7A: $10
* 8.2V 2.5A: $12
* 9V 500mA: $5
* 9V 3A: switching,$10
* 12V 2A: $10
* 12V 5A: switching,$22
* 15V 2A: $10
* 笔记本电脑电源 15V 16V 18.5V 19V 19.5V 20V : $20 to $38