Samsung Electronics GmbH
Hello,
yes, the Powerbank EB-P3400 can also be used with older models such as the Galaxy S10. Please note that the 25W fast charging function is only available when one device is connected to the power bank. If several devices are to be charged at the same time, the maximum charging speed is 9 watts each.
Best regards from Eschborn
Your Samsung Service Team

Yes, this also works for older mobiles such as the Samsung Galaxy S10. The power bank supports Power Delivery 3.0 (PD3.0) and Super Fast Charging, which is compatible with the Galaxy S10 as it also supports USB-C and fast charging functions. So you can easily charge your Galaxy S10 with this power bank.