I was wondering. If I took a handful of 9V square batteries and connected them in parallel (where all anodes (+) are connected together and all cathodes (-) are connected together but no anode or cathode join each other) would the mAh value be the sum of the mAh values for each battery with the voltage the same?
And is it a bad idea if I left these batteries connected this way for a long time if they are not in use?
And is it a bad idea if I left these batteries connected this way for a long time if they are not in use?