Sony Xperia1 IV User Manual page 288

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Lithium-ion batteries are precious, recyclable resources. Do not discard of old handsets,
batteries, or chargers with ordinary waste, and instead bring them to the nearest shop with the
Mobile Recycle Network mark.
Storing handset with full-charged or insufficient battery level deteriorates battery performance. It
is recommended to store handset with 40% battery level.
Turning off by pressing Power Key does not shut off handset from power source completely.
Unplug AC Charger power plug to completely turn it off. Use AC Charger (optional accessory)
near a power outlet for easy unplugging in case that malfunction is detected.
Display may become dim when handset temperature rises. It is not abnormal.
Do not subject handset to excessive shock. Do not deform USB Type-C Port/Headset Jack. May
cause malfunction.
Occasionally clean Charging Terminals with a dry, cotton swab etc. Dirt on Charging Terminals
may cause power shut-off or insufficient charging. Take care not to damage Charging Terminals
when cleaning.
Clean with a dry, soft cloth. Rubbing hard with a dry cloth etc. may scratch them. Wiping off with
wet dustcloth may cause malfunction. Using benzine, thinner, alcohol, detergent, etc. may fade
color/print.
Do not leave Camera in direct sunlight. Concentrated sunlight through Lens may cause handset
to malfunction.
Do not bring magnetic data or magnetic objects close to handset. Magnetic data on cash card,
credit card, etc. may be erased or may cause handset malfunction.
Charging
AC Charger (optional accessory) may become warm while charging. It is not abnormal.
If charging is started, although handset is unavailable for operation, screen indicating that
handset is charging appears. For this reason, do not charge where handset is required to be
powered off.
Check battery level with Status Indicator at the top of screen.
Operation time of Internal Battery varies by usage environment or the battery condition.
Internal Battery is consumable item. Operation time per charge decreases by charging
repeatedly. When operation time with full-charged is extremely shortened, it is time to replace.
Internal Battery is not customer-replaceable. Bring handset to a SoftBank Shop etc. to replace
Internal Battery. Fee is incurred for the replacement. Contact a SoftBank Shop or Customer
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Safety Precautions

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