Sony Xperia XZ2A Manual page 21

Charging start sound sounds and Notification Lamp on handset lights up when charging starts.
When charging is complete, unplug AC Charger and remove USB Type-C connector of
AC Charger straight from handset
Charging ends.
Charging with Wireless Charger
Handset can be charged using a wireless charger.
For details on charging, see the instructions included with the wireless charger.
Products with a

Wireless Charging Cautions
Observe the following when charging with a wireless charger.
xperia-xz2a_01_Getting Started.docx
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comply with WPC (Wireless Power Consortium) wireless charging standards.