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.
USB ports stopped working on my laptop. I have a Lenovo IdeaPad Y500 running Windows 10, which has two USB 3.0 ports on the left side of the laptop, and one USB 2.0 on the right side. I was away from my computer for a few minutes, and when I returned, the mouse I had plugged into one of the left side USBs wasn't working.