I have been challenged to design a circuit (This isn't academic btw) which is made up of 2x12v batteries. I have to power some 24v light tubes, start a 24v Diesel heater + power a 12v fridge and a 12v water pump. Can i actually do this with only 2 batteries? I know that 2x12v cells in series will give me 24v as long as they are the same current rating. could i then tap off a 12v supply from one batt or share the load between them somehow? Sharing the load is obviously the best option. Can anyone help me? I need to learn but cant find where! Cheers guys, CAM P.S. Did you know that the human body sheds, on average 19Kg's of dead skin cells, 'orrible or what?!