Systems and methods for mitigating the risk of and/or suppressing fires caused by lithium battery-powered personal computing devices used on the flight deck or in crew and passenger compartments onboard an aircraft. A fire detection and suppression pack is attached to a lithium-ion battery-powered portable personal computing device. The fire detection and suppression pack has a weight and volume consistent with and does not impair the use of the portable personal computing device. The fire detection and suppression pack is a full-time fire suppression system that is on hot standby at all times, independent of the computing device's power mode. The fire detection and suppression pack uses gases stored in canisters to provide cool-down, displacement suppressant to control and extinguish any fire source and associated burnable fuel required to sustain the fire event.