I retrofitted a couple old UPS boxes with external battery packs that provide more runtime, but I do not trust those UPS devices to calculate the remaining charge to decide when it’s time to shut down. I needed to set explicitly how much time I want the system to run on the battery power till it shuts itself down. Unfortunately, the UI does not allow to set that value to be outside of a small hardcoded range, however…
As of today CyberPower uses MySQL to store the setting. The screenshot below shows where the DB is stored on Windows 7 x64 machine and the field to tweak. Note, that the UI uses a drop down selection box, so it’s not going to show that value. Any change made through the UI is going to update it in the DB.