Does anyone have any long-term experience with third party UPS replacement batteries? The battery set on my APC RS1500LCD needs replacing. The APC batteries are ~$75, while third party OEM batteries are around $30. I've already seen that some of the OEM batteries are only 7.2 A/H instead of 9.0, but there are plenty of 9.0 A/H sets in the $30 range. I've bought APC replacement batteries for some smaller UPS units in the past, but the premium for the brand wasn't quite as high as they are for this larger UPS unit.
All the reviews I've read seem to only cover a few months of use. I'm interested in how well they do compared to the APC batteries in years versus months. Has anyone used these and had them last 3+ years?