S24 Ultra and TabS9 Charging

[userA8NLmjoTcy]

I have an S24 Ultra phone and a Tab S9. I charge them with a third-party charger. It shows the charging voltage and current.
The voltage is 9.1 volts
The current is 3.5 amperes
Neither the phone nor the tablet gets hot while charging.
Is this harmful to Samsung devices?
Everywhere they recommend using fast chargers, but nowhere have I seen specific parameters for charging current and voltage.

[LongHiker · Accepted solution]

@userA8NLmjoTcy The devices will regulate the charging to ensure that it isn't damaged. So, yes it is safe to use.