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.
3.0 USB-C to USB-A. USB-A is the original USB port thatâs used by just about every computer. This cable transfers power and data between current systems with USB-A ports and new devices with USB-C ports. It supports USB 3.0 superspeed data transfer up to 10 Gbps and charges USB-C devices with 5V at up to 2.4 amps.