I have a problem with an APC Back-UP 500 LS UPS.
The ups started by beeping with the "replace battery" led on. The beeping and lit led were not constant.
I replaced the battery with a new one but the beeping did not stop.

Then I installed the Powerchute software to silence the alarm but instead I discovered that the reason for the beeping was the UPS sometimes thinks the battery is disconnected. The software keeps showing "battery disconnected" and "battery connected" messages in a cyclic way.
When the UPS detects the battery, the...