The most interesting thing about the Pixel 5 is that although it comes with an aluminum back, it has wireless charging and reverse wireless charging. Every other smartphone with wireless charging is shipped in glass because it is not possible to add wireless charging to a metal phone. So how on earth did Google add wireless charging to the Pixel 5 in metal? Well, that’s smart.
Google has revealed to some members of the media that the pixel 5 has a window on the back of its metal body, with charging coils embedded in it. A layer of “bio-resin” is then applied to ensure uniform appearance and surface, and to prevent any damage to the charging coil.
Google’s approach is smart enough, and for now, it doesn’t seem to have any side effects. The Pixel 5 supports wireless charging while also supporting wireless charging up to 10W. How effective this “bio-resin” coating is in long-term use is only a matter of time. But this isn’t the first time a smartphone company has done so. LG did this in its early years, but in recent years OEMs have switched to glass panels to provide wireless charging on their devices.
So why doesn’t Google use the back of the glass directly on the Pixel 5? According to the company, the aluminum frame and “bio-resin” coating allow it to maintain a relatively slim profile for the device while still accommodating a relatively large 4080mAh battery.