Welcome ! My pal has just acquired am ST2 (previously Jap bikes) and he emailed me a site he likes for ST series. I no longer have an ST but we were discussing the pros/cons of a battery tender and the site discusses, plus loads of other stuff, hope its useful :
www.bike-gizmos.com/DucatiSTFAQ.html Whiile you are at the bar, I'll have a Moscow Mule (giner beer, lime and vodka) cheers.