Basics9Precautions for operating environmentYour device may heat up due to the environment in the following conditions. Use caution toavoid shortening the battery’s lifespan, damaging the device, or causing a fire.• Do not store your device in very cold or very hot temperatures.• Do not expose your device to direct sunlight for extended periods.• Do not use or store your device for extended periods in very hot areas, such as inside acar in the summertime.• Do not place the device in any areas that may overheat, such as on an electric heatingmat.• Do not store your device near or in heaters, microwaves, hot cooking equipment, or highpressure containers.• Do not use a cable whose covering is peeled off or damaged, and do not use any chargeror battery that is damaged or malfunctioning.

Samsung Galaxy M40 User Manual