When the SR10 is connected to bike power via the cig lighter adapter through the accessory circuit, it detecs power available and turns on. It runs off bike power, not internal battery. As long as it runs off the bike, it will never run off its own battery, which will always be charged.
The SR10 battery will never discharge.
connected to the quartet harness, the SR10 will turn on when the key is turned on, unless its connected to the batt live line. (Not a good idea)