I couldn't find the datasheet to my Quioran QR50E water pump and I want to estimate if I can run an arduino and 4 of those on a battery for longer than a month. I don't know the quiescent current of the pump and I think it could be much more than the arduino's. It is a 12V DC, 5W water pump with a Qmax of 280 liters per hour.
What is it's quiescent current? If no one knows, could I astimate it? What are normal values for such small pumps?