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I have a Galaxy S9+ (with "fast charging"), which requires a USB-C charger. I also have a MacBook Pro with a USB-C charger.

I am curious whether I can (safely) charge my Galaxy S9+ with my MacBook charger. The phone shows that it is charging, and very fast actually.

However, I am not sure whether the charger has too much power and would negatively impact the battery on a short time (perhaps get too hot or even cause physical damage/explode) or long-term (decreased battery health).

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    Just a thought, you might want to ask this in a forum for Samsung phones... – Steve Chambers Sep 7 '18 at 23:57
  • If you don't get an answer here, try asking on Android.SE – abc Sep 8 '18 at 0:06
  • @SteveChambers the question is related to Mac. – Ruskes Sep 8 '18 at 0:38
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All devices (Phones) are 5 Volt technology.

How fast it charges depends on....

Can the charger provide the power the battery is asking for.

Battery is a SMART battery type (it has a chip build in) so it will regulate the charging process safely.

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