You mentioned in your Shark 3 video that it only uses 1 pump when plugged in @1:39 when you compare the inflation times using a 12V Source the Shark 3 is about half of the Shark 2 and Shark 2S, does the Shark 3 use the two pumps when plugged into 12V? Great video comparison BTW!
The Shark 3 only uses 2 compressors when it's running off the internal battery. When it's running off a 12 volt source, it only uses one compressor. The reason for this is the amp limit of most 12 volt outlets which is around 10 amps. The internal battery can put out a few times that. There isn't enough current capacity available from most 12 volt outlets and they don't want you blowing fuses in your car or causing a fire.
