Where is the battery on Harley Davidson road king?

remove seat and theres youre battery on any harley im aware of

It all depends. On mine (1988 FLHS) it is located on the right side next to the oil tank, under a fiberglass panel. Getting to it on a V-Rod requires removal of the seat, flase gas tank, air filter, kitchen sink.... yada yada...

It depends on the model. Refer to your owner's manual, also known as The Bible, for within its pages, all things are made clear.