This was originally posted on APC forums on 7/14/2012
i bought this ups about a year ago for my mother she never plugged it in and now i have it. when i plugged it in the battery just flashes in the lcd.
I pulled the batterys and checked only 12 v checked each battery one 7v the other 5v. so i bought 2 new batterys and installed them 24v +- 2 but the battery still flashes and no bars in the battery.