I went searching on how to make bike batteries last longer and found this.
Understanding Motorcycle Batteries
http://www.yuasabatteries.com/motor_battery.phpQuoted the last sentence "A lot of riders who believe they take excellent care of their batteries are actually killing them with kindness."
On average I ride 6 days a week all year and don't think about doing anything re maintenance for the battery. The Yuasa that I just replaced was in use for no less than 3 years 6 months and no more than 3 years 9 months as I don't recall the exact month in early 2012 that I put it in. The longest time a battery sat for me was from Jan 2012 to end of March while I did the timing belt etc. which more than likely led to putting in the last Yuasa.
Now with an Australian made SSB battery I wonder if it will last as long as the Yuasa ones