I've got a electric bike with a 24 volt system which is powered by two 12v deep cycle RV/marine batteries.
Obviously they're wired appropriately.
My question is can I add a 3rd battery to the mix by simply hooking it up to one of the original two?
Common sense tells me to hook it to one battery - positive to positive and negative to negative - thereby making the two of them the same as one ex-large 12v battery.
Exactly how would the connection be made?