Any phone charger could be used with any phone, and most tablet chargers would work on any tablet. Pretty simple stuff. All Micro-USB chargers were rated for 5V, so you never really had to worry about accidentally plugging your phone into a charger with too high of a voltage. But now, things are much more complicated.
\n can you charge usb to usb
Now, sometimes you might possess a good adapter complying with Battery Charging Specification 1.1 (BC 1.1) or above, but its charging end is the micro-USB (Type-B Micro). In that case, you can use reliable micro-USB to USB Type-C converters to make the old charger a perfect fit for a new Samsung, Moto, or any other Android phone you bought.

Plug the USB-C end of the adapter into a USB-C or Thunderbolt 3 (USB-C) port on your Mac, and then connect your flash drive, camera, or other standard USB devices. You can also connect a Lightning to USB cable to sync and charge your iPhone, iPad, or iPod.

Remarkably, you can charge a Switch console from the iPad, but you have to make sure you plug the USB-C to USB-C cable into the Switch first. Doing so will drain power from the iPad to the console. A Samsung 45W USB-C power charger will charge the S21 super fast using up to 25W. To achieve super-fast charging speeds it must be connected usb-c to usb-c. The charger defines the maximum amount of power that it can draw but the device will define how much is actually drawn to the device. Is there a 45W charger available for the S21 series?
The issue here is that you can theoretically charge a tablet (or toothbrush), through an appropriate USB port on a hub, or you can connect the hub a different way to attach a pen drive to a computer (my toothbrush can't use a pen drive). But you can't do both simultaneously. The reason for that last point is the gist of the question.
You can charge your iPhone with third-party USB-C chargers, but an MFi-certified charger is the best option. Apple's USB-C to Lightning adapter costs $29.99, but we don't recommend using them on your old Lightning cables. ejmBVQ.
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  • can you charge usb to usb