Can this be done? My S9+ died and I left my charger at work and I'm wondering if I can charge it with my S7 edge using the micro USB to USB c adapter? Or at least wireless charging?
sure! can generally be charged from any charger
thanks but I don't think that helps much. I don't have a wall charger or the USB c cable, so I was wondering if I can us the USB c transfer adapter that came with the S9+ to connect with my s7edge to charge the s9+, or wirelessly charge the s9 from my s7.
you can try
Not possible. S10+ and Note 10 has the wireless charging feature to charge other device like the S9+. But S7 edge does not have.