I've had a Leibert UPS for a while and for some reason I decided today to plug the UPS cable in so I could get around to configuring NUT.

However I noticed that without doing anything else, Ubuntu (15.04) was showing me a battery indicator (much as it would if this was a laptop). I removed power and it showed discharging, but not until a few minutes had passed. Similarly when restoring power it too several minutes to show charging.

Any ideas where I can tweak this? I can't see any of the usual tools installed.

(I did find /sys/module/battery/parameters/cache_time but changing that to zero had no effect.)