DIY a power supply, input 12V, the output 12~46V adjustable;
For your electronic equipment power supply, according to your system set the output voltage value;
As the vehicle power supply for your laptop, PDA, or a variety of digital products supply.
Can be equipped with high-grade aluminum alloy shell thickening frosted direct PK off the market average vehicle power supply or inverter, is like metallic your best choice;
DIY a laptop mobile power supply: 12V coupled with high-capacity lithium batteries, so you will be able to light the books where they go.