Belkin PUREAV AVU1500 Guide D'utilisation page 10

Features
Shutdown
Stage 1
Stage 2
Stage 3
If you prefer to avoid the staged shutdown procedure, then you have
the ability to override it and supply power to all the rear power outlets
until the usable battery power is depleted or the power comes back on
(whichever comes first).
Stage Time
You have the ability to see how much approximate battery-backup time
each stage has. You can check these times before and during a power
outage. The "Stage Time" button on the front control panel enables you
to cycle through the estimated battery-backup times.
Of course, the estimated times are based on which components are on at
that moment and how much power each is consuming. Changes in your
home theater system's power consumption will affect battery-backup
time. Your AVU1500 intelligently estimates these times knowing and
taking planned changes into account: It knows how much power is being
consumed by each stage of its three-stage shutdown sequence. Unplanned
changes (e.g., if you manually turn things on or off) are handled as they
happen: Changes can be detected and your AVU1500 will recalculate
estimated remaining battery time.
7
When Power
Outlets
Battery's High Current
usable power Filter Bank D
supply is
at 90%
Battery's Analog Filter
usable power Bank B and
supply is Digital Filter
at 50% Bank C
Battery's Digital Filter
usable power Bank A
supply is
at 0%
Notes
e.g., amplifier
and subwoofer
Non-critical devices that
can lose power without
problems (e.g., CD players,
DVD players)
Critical devices that should
be powered as long as
possible to save settings,
record TV shows, etc.
(e.g., VCR, DVR, satellite/
cable boxes)