Typical sealed lead acid batteries in my UPS devices last at most 5 years. That's with minimal use (one large outage a year, drained at most 50%, smaller minute-based outages) and no vibration to contend with for the plates within. I've seen cars and motorcycles last 7-8 years before failing. Of course, the car doesn't tell you the battery is failing until you either notice the starter moving slower under load or the car just doesn't start. UPS devices (good ones) will test the battery at least once a week to ensure fail-resistant use.

Given that these probably aren't SLA batteries, they could last much much longer depending on depth of discharge allowed. li-ion, for example does remarkably better (2000 more cycles) at only taking the depth of charge down to 75% as opposed to 30% or lower.