Cell phone and tablet chargers need space to breathe, according to fire officials. These devices generate heat during charge cycles that must be dissipated by proper ventilation. Devices that are covered and unable to breathe may build up heat and lead to ignition. The lithium-ion batteries used in these devices have pressurized containers that may rupture if the temperature rises quickly or melt down if heated for a long period of time.
Can my cell phone catch fire while charging?