OK so i want to start out by saying that i am by no means a electrical engineer or English person. this brings me to my idea that i am looking for some suggestion on or advise. i am going to college for robotics engineering and as i build many robot projects i run into the issue of having many batteries. i have several dozen AA batteries, AAA, D, C, 9V, 12V, 6V, 3V, . . . that vary from NIMH, NI-CAD, Alkaline, Li-po, or just lithium in general. OK so needless to say i have a lot of batteries and they go fast when you test motors. what i want to do is build/buy a battery charger that will work for all of these. if i could have it all automatic that would be nice but i understand that i would have to have some user interface. if any one is willing to respond with some suggestions with how i should go about this that would be great or even just point me in the right direction.