Snowden explained that the CMOS button battery is enough to send a transponder signal that can be heard by a drone. He said the only way to shut it down is to p

Snowden explained that the CMOS button battery is enough to send a transponder signal that can be heard by a drone. He said the only way to shut it down is to put it in a freezer. I mean, I'm a programmer, I am not an expert on sigint stuff, but I don't think it's very hard to innovate in intelligence gathering technologies.