Fire alarm systems need to be inspected, tested and tagged annually. Testing must include all smoke detectors, manual pull devices, annunciators, visual indicators and strobes, control units, voice/alarm communications systems and any other devices that are a part of the fire alarm system.
it will need a port like this one to get more power from the usb since it only give 5.0 volts and this powered usb give up12 to 24 volts so you dont have that in a laptop and there is no way it could raise the power on the usb port in a laptop without damaging something .http://en.wikipedia.org/wiki/Powered_USB.
1 Compare the back of your computer to the back of your monitor. 2  Use the table below to ensure that you connect the correct video cable to the correct video port on the back of your computer and monitor. 3  Laptop Computers: Most laptop computers have a port on the side or back of the computer to connect an external monitor. Plug the power cable into the back of the monitor, then connect the opposite end into a power outlet or power source. 2  Monitors do not receive power through the video signal cable, but instead need their own power connection. 3  Compare the back of your computer to the back of your monitor.