145Never dispose of batteries or phones in a fire. Follow all localregulations when disposing used batteries or phones.Never place batteries or phones on or in heating devices, such asmicrowave ovens, stoves, or radiators. Batteries may explode whenoverheated.Never crush or puncture the battery. Avoid exposing the battery to highexternal pressure, which can lead to an internal short circuit andoverheating.Avoid interference with pacemakersMaintain a minimum of 15 cm (6 inches) between mobile phones andpacemakers to avoid potential interference, as recommended bymanufacturers and the independent research group, WirelessTechnology Research. If you have any reason to suspect that yourphone is interfering with a pacemaker or other medical device, turn offthe phone immediately and contact the manufacturer of the pacemakeror medical device for guidance.Turn off the phone in potentially explosive environmentsDo not use your phone at refuelling points (service stations) or nearfuels or chemicals. Turn off your phone whenever directed by warningsigns or instructions. Your phone could cause explosions or fire in andaround fuel or chemical storage and transfer areas or blasting areas.Do not store or carry flammable liquids, gases, or explosive materialsin the same compartment as the phone, its parts, or accessories.