Universal Power Group 12V 18Ah Replacement Battery for APC RBC7-2 - Compatible with UPS Systems, Backup Power Supplies (2-Pack) - Ideal for Home Office, Server Rooms & Emergency Power Backup

Lasted almost exactly a year and a half, before my APC 1500 gave me the "battery issue" warning. (moderate use in a climate controlled environment). Which, given the price, is OK. But this time around, I'm going with one of the slightly more expensive pre-wired packs, with a 2 year warranty. If you just want to get your home computer UPS back up and running (especially for brownouts, rather than extended blackouts), these are great. If it is business critical, think about paying a bit more somewhere else.Minor update. After ANOTHER year and a half of use as emergency back up lighting batteries, one finally went "bad" when hooked up to my external charger. So, if anyone is counting, that's 1.5 years of heavy UPS use, and almost another 1.5 of backup lighting use. Not bad for a 1 year warranty battery. still a great price for non critical use. The UPS batteries that replaced these are also 1.5 years in, but showing 94-95% capacity remaining.