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.
Follow these step-by-step instructions to use a memory stick. Step 1: Firstly, you need to insert the memory stick into a USB connection port on your PC or laptop. Most USB connection ports can be found on the front of PCs, to the side or at the back of laptops, and on some monitors and keyboards. To find the correct port look for the USB symbol (see right).