I'm an EE - specializing in power conversion, no less - and this is flat out impossible/bogus/a scam.
I'm not an engineer, but I'm familiar with the laws of thermodynamics and I certainly know you can't get energy from nowhere. However, isn't this project just saying it
improves battery life as opposed to keeping it perpetually charged? It doesn't exactly sound like a perpetual motion/free energy scheme, but then again I'm just going by what was written in your description.
I'm not inclined to argue about it, since it probably IS a scam given how many of these things turn out to be exactly that. I've also never heard of this type of technology, which if viable would seem to be a huge breakthrough and wouldn't be marketed like this.
Perfectly valid observation and questions. The "device" is described as sticker made of "conductive paper*" which when adhered to the back of *any* cell phone (or cryptocurrency mining rig!?) will capture energy from the air and somehow magically convey it into the battery/charging system of the phone. Without any wires or other power conversion circuitry. THAT is what is impossible.
Also, while there are myriad signals zipping through the air from satellites, power lines, cell phone towers, radio station transmitters, etc., you can't capture them without an LC** tank circuit tuned to resonate at a particular frequency. Of course, by tuning an LC tank to one frequency you necessarily exclude its ability to respond to others - this is precisely how wireless energy transfer systems work, btw.
Furthermore, there does exist a voltage differential in the atmosphere of around 100V/m on average, so a non-conductive 10m tall tower with an electrode at the top should have 1000V between the top electrode and ground... except that the available current is in the picoampere range (ie - billionths of an ampere), which puts the available power of even a 100m tower in the nanowatt range. Given that phones require 3-5W to operate on average, a few nW aren't going to amount to the proverbial hill of beans.
The average person is not going to understand enough electronics to spot the issues with REBGLO's claims, but since I do I felt it my duty to point them out.
* - there are silver and copper bearing inks that can be applied to paper to make it conductive, but since they cost way more per unit area and than a piece of aluminum foil, there's not much point using them.
** - an LC tank is formed whenever a loop is formed between an inductor and a capacitor, and exhibits resonance (or maximum energy storage capability) at a frequency of 1/(2*pi*(LC^0.5)).