Edit: This capability that of americans for instructing me, the sound is seemingly transmission/or turbo, no longer the battery itself. Thanks!
Elegant an spicy thing I spotted: whenever you maintain stereo headphones, you’re going to be ready to purchase one in all the ears off and listen to appropriate the engine, or appropriate the battery deployment (i.e. batter is by one audio channel and engine the many). When paying attention to appropriate the battery, there are hundreds similarities to Formula E. Ferrari and Renault are the 2 most glaring for me.
Here’s a video for those eager:
Even more attention-grabbing between each and each automobile, the battery in the mercedes PUs isn’t very certain, neither is the Toro Rosso’s Honda, but the RBR Honda is audible. I wonder if this is a PU setup thing or an FOM microphone thing.