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 Adapters are available to convert DVI to HDMI or VGA to composite video. 2  You can also get an adapter cable to connect your computer's USB port to your TV's HDMI port if your laptop has no HDMI port. 3  Converters, especially analog ones, typically result in a loss of quality, so avoid them if possible. You can also get an adapter cable to connect your computer's USB port to your TV's HDMI port if your laptop has no HDMI port. 2  Converters, especially analog ones, typically result in a loss of quality, so avoid them if possible.