mm high power brushed and other ?'s

so i got a slash yesterday and instantly replaced spedo with mm. what is high powered brushed mean for the mm, i see the wiring is all crazy 3 wires to positive and negative to the battery. i thought it was a joke high powered BRUSHED mode, whats it for

also i have a hyperion 0610i and will be charging of a 1:1 car battery while camping; how often should we be starting the car, charging at 4 amps, it a ford explorer. basically how many batteries (2s 4000 mah ) should i be able to do before the 1:1 battery dies?

and last has anyone else had trouble getting their mmm or mm to stop the beep at the beginging, other setting are taking but they both still beep at me and i hate it

thanks all