I'm happy that I bought this wireless charger,, I hold nothing against Back Market for selling refurbished electronics, I think that is amazing!! It's just that I think Samsung could have done a better job creating the design because sometimes I lay my phone on the panel to charge it and I have to reorganize the way that my phone was layed on the panel. I'm not quite sure how long it takes to supercharge a device but, it takes about 2 hours to charge my Samsung Note 20 with the battery nearly fully depleted