It varies from model to model, for example on the Super Glide it's under the saddle on the right side while on the Tour Glide it's under the front of the right saddlebag.
If in doubt, simply follow the positive cable from the starter motor. It will lead right to the battery.
There are a number of places where one can purchase a Harley Davidson battery. For instance, JP Cycles, Throttle Batteries, and Battery Mart all carry Harley Davidson batteries.
Harley Davidson Shovelhead
One can purchase a replacement battery for their Harley Davidson motorcycle at their local Harley Davidson store, online or a private shop that specializes in replacement batteries.
Under the battery box on the right side of the bike. It is the black module that is screwed to the box
Under seat.
Of course you can.
under the Seat
remove the seat
Low Battery
12 volts
No, they are covered by the battery manufacture.
12 volt.