A lot of skylines have batteries with the JIS Pencil battery posts (stock battery terminals are the same size I believe), but if a terminal wears out or breaks, it's a royal PITA to find a new one. So I found these that will make it so you can use standard SAE battery terminals, which opens up a lot of options if you want car audio type terminals as well.
http://earthenergy.us.com/index.php/pencil-post-adapter-for-jis.html
