Sounds more like a hack that sends a signal to the phones telling them to dump their charge.
the chemtrails ate your cellphone batteries.
There are several one-off venue-specific apps created for rock and DJ-type performances; one of these could be in use and over-cycling and running down the cell batteries.
Kids put these apps on their phones in exchange for discounts on food/drinks and merchandise (some include Tinder-like functionality to introduce people, find common interests, etc) in exchange for providing micro-analytics to the app builders.
The apps run on wifi in the venue and provide all manner of locational and interactional data. This is useful to the app builders in terms of things like placement of services, advertising, seating, etc.
One app builder got in trouble not too long ago for collecting data outside the venue it had originally been intended for.
Big brother thanks you for your cooperation, which you really didn’t have any choice in.
In this subsection, we consider the gross gyral morphology in relation to the typical mass drain onset, course and ending. But before, we refer to a particular curvature-induced phenomenon that provides a mechanism how wave segments can emerge in the first place. It was shown that the wave front can undergo a critical deformation above which propagation is blocked [31]. A broken wave front is needed to distinguish spatio-temporal pattern obtained in the susceptibility intervals (σ>1) and (1>σ>0). The evolution of closed wave fronts does not differ much until the front breaks open, for instance due to a local curvature-induced excitation block.
“the gov also has the ability to pull electrons right out of the air with electromagnets”
Possible causes : software virus,fake news, big numbers probability (running out of battery happens all the time with smartphones, so when there is a lot of smartphones at a same place, the probability that a good number is out of battery is not null)...