well,  I got 5 years out of my wife's 2002 Suzuki OEM battery.  Yes, she is pulled out every winter and trickle charged in a nice warm basement.   My wife only has 6600KM on her bike,  not alot of riding in 5 years..ha  I tried to start the bike last nite..... lights are nice and bright but not enough amps to power up the bike.  I put it back on the trickle charge for 6 hours and she started up nicely this morning....but not holding a charge for more than 24hrs.  On another note , my 2002 Honda CBR's OEM battery is healthy as a horse.  She started up my bike in a micro second.... off to the Canadian Tire store for new battery.....hope to ride this week.   

Ride Safe everyone.

That's my average life [expectancy] for batteries.  Except for one Yuasa out of an '82 Kawasaki Kz440 that lasted more than 10 years, and was sold in one of the Yamahas that I had.

Dunno where you're located.. but in Florida, I was lucky to get 3-4 years out of a car battery.

3- 4 years on a car battery.....man, I get up to 8 plus years on a car battery.  I live in Vancouver, BC.   and my Honda CBR  600 is on its 6th year....just lucky I guess 

Yeah I have a 99 and have no idea if the batt is original or not. The batt was getting pretty weak and it was hard to start when it was cold out, especially when I hadn't ridden it in a couple days. A few days ago I checked the electrolite level and it was really low for some reason  anyways, I topped it up and noe it starts much better.