5Safety Precautions/Notes on waterproof, dustproof and shock-resistant propertiesWhen removing the back cover, do not exert more than necessary force. The battery pack might jump out, for example, and cause injury or a fault.Do not operate the product while driving an automobile or motorized bicycle, riding a bicycle or walking. Doing so may compromise traffic safety and cause an accident.If charging is not completed after the specified charging time, stop charging. Failure to do so might cause leakage of liquid, overheating, rupture or fire.Do not leave in places within the reach of small children. Small children might swallow small parts, etc. by mistake and choke on them, or might drop them by mistake and cause accidents or injury.CAUTIONBe sure to read the following cautions before use.Do not store the product in places subject to direct sunlight (e.g. in automobiles), places that get hot, places that get extremely cold, and in humid or dusty places. Doing so might cause overheating, fire, deformation or a fault.Do not leave on unstable places such as rocky stands or tilting surfaces especially while the vibration mode set. Dropping the product may cause injury or damage. Also, pay sufficient attention to impact, etc.Do not cover or wrap the product with bedding, etc. while using or charging the product. Doing so might cause fire, fault or injury.Do not touch the product or specified charging (sold separately) equipment for a long time while power is being supplied from an external source. Doing so might cause low-temperature burns.The product may become hot by prolonged use especially in high-temperature environment. Be careful when using the product touching your skin for a long time, as it might cause low-temperature burns.Do not use power outlets or wiring apparatus beyond its rating. Also, exceeding rating, for example, by connecting multiple devices to a single power strip might cause overheating and fire.Do not use the product with the back cover removed.Do not place near corrosive chemicals or in places where corrosive gas is generated. Doing so might cause a fault or loss of internal data.Do not leave or store with the back cover or battery pack removed from the main unit. Doing so might allow dust or other foreign objects to get inside and cause a fault.Do not use if there is smoke, abnormal odor or noise, excessive overheating, or other abnormalities. If an abnormality occurs, disconnect the specified charging equipment (sold separately) from the power outlet, make sure that the product is not overheating before turning the power off or removing the battery off, and contact an au shop or Secure cell phone support center. Also, if you have dropped or damaged the product, do not continue to use it in that state, and contact an au shop or Secure cell phone support center.When using an earphone, etc. with the product, adjust the volume to an appropriate level. Setting too loud a volume or using the earphone continuously for a long period of time might adversely affect your hearing. Also, raising the volume too high might prevent you from hearing sounds around you, which might in turn lead to a traffic accident at a railroad crossing or pedestrian crossing.When adjusting the volume when using an earphone, etc. with the product, raise the volume a little at a time. If you raise the volume too much from the outset, sudden loud noise from the earphone, etc. might adversely affect your ears.When using the specified charging equipment (sold separately) or external device, insert/remove the connector straight to/from the terminal. Make sure the orientation of the connector is correct. Failure to do so might cause damage or a fault.