I doubt attackers only rely on a battery API. It's a conglomeration of attributes, not a single one. Problem isn't this phone with 30% battery is Adam Jensen. T

I doubt attackers only rely on a battery API. It's a conglomeration of attributes, not a single one. Problem isn't this phone with 30% battery is Adam Jensen. The problem is this phone with 30% battery and this user agent, and these addons, that takes X time to render SVG as Y, and takes 20ms to execute this code, etc. is Adam Jensen. For example the mere presence of battery API gives bits of information (because it identifies your program as phone or computer). I assume that Battery API: A) Provides enough bits of information, B) Isn't useful enough.