Battery life???

Hello everyone Can someone tell me how long an original battery lasts for a Sporty? Doesn’t need to be exactly on the day but only 2 to 2 1/2 years are a little short or not? Have the 1200 sportsters added to me (uses 2004) and now the battery is broken (no more) Lt. dealer only holds a gel battery for a maximum of 3 years anyway. I don’t know about the Honda. (Bj.2001 still first ) My Holde laughs at me and only then I think I should push . Your Shadow (formerly my !!!) always starts. But may also be that I am too stupid for the Harly and better buy me a bike(grins) But someone knows an answer to that . And before someone wants to trouble me ! I mean about battery and not bike In this sense greeting Winni