Your robot cannot stay outside over the Winter, it is really bad for the battery. It also needs to be charged at least once per month. We don't recommend leaving it on the charger. Use this cable to connect the power supply to the robot's charging terminals while indoors.
If you have the GPS unit installed, unplug it immediately upon bringing your robot indoors. Then charge the battery at least once per month. This will keep it in top condition.
If you are not available to charge the battery or think you may forget, then charge it overnight and disconnect only the black wire from the motherboard. Then you won't mix them up when you reconnect it in the Spring. Re-charge the robot with the Winter Charger before setting it up outside and you are good to go!