After unboxing Galaxy S9 or S9+, you may want to charge Galaxy S9 battery so that you can start to set it up and use it.
When Samsung Galaxy S9 and S9+ left the factory, the battery is charged to about 50% of the capacity, which is sufficient for you to inspect the phone on the counter.
Because the only difference between Galaxy S9 battery and Galaxy S9+ battery is the size (capacity), charging Galaxy S9 battery is identical to that for Galaxy S9+. Therefore, we use Galaxy S9 to refer to both Galaxy S9 and S9+.
Two ways to charge Galaxy S9 battery
You can charge Galaxy S9 battery in two ways:
- Using a USB cable (USB charging).
- Using a wireless charging pad (wireless charging).
All Android phones now support USB charging. The charging port in most Android phones has been shifting from micro USB to USB-C.
Both Galaxy S9 and S9+ have a USB-C port for charging and data transfer.
In your Galaxy S9 box, you can find the wall charger and the USB cable to charge Galaxy S9 battery.
Galaxy S9 and S9+ also support wireless charging. Samsung has added the wireless charging to Galaxy phones since Galaxy S6.
You can put Galaxy S9 or S9+ on a wireless charging pad to charge the phone.
What is fast charging for Galaxy S9 and S9+?
A normal USB wall charger has a rated output current ranging from 500mA (0.5A/5V, 2.5W) to 2000mA (2A/5V, 10W).
When using such USB wall chargers to charge Galaxy S9 and S9+, the charging voltage does not change. It is fixed at 5V. And Galaxy S9 and S9+ battery can take up to 2A current for this type of wall charger.
In addition to “normal” USB charging, Galaxy S9 and S9 also support fast charging when an adaptive wall charger (aka fast charger) is connected.
An adaptive wall charger can communicate with Galaxy S9 and S9+. Galaxy S9 and S9+ can then choose two charging modes:
- Fast charging at 9v 1.67A (15W).
- Standard charging at 5V up to 2A (10W).
The fast charging mode (mode 1) will be active only when:
- the battery level is less than about 60%; and
- the phone screen is turned off except always-on display; and
- the phone temperature is not too high.
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