My biggest grief with the APC UPS are that they initiate the shutdown process immediately in case of power loss. I live in a location where we frequent has 10 - 60 seconds power cuts. The optimal solution would be if the UPS waited like 5 minutes before starting to shutdown the connected PC. For this reason alone I stopped connecting my desktop pc to UPS and stopped installing the UPS powershute software. I wrote their support and asked if i could daisy chain a battery with the UPS so the battery would be used first and when that battery was depleted the UPS would take over and start the shutdown process. They advices me against this and pointed me to this FAQ. It doesn't directly adressing daisy chaining a UPS with a battery. Anyone here that has experience with doing that?