Philips intelligent remote control User Manual page 12

If the display is too light or too dark, adjust the contrast. (See page 14.)
NOTE
BATTERY LIFE
When the batteries are running low, the Low Battery icon blinks at the
center top of the display. The remote control may continue to operate your
equipment with low batteries. However, you won't be able to use the remote
control's learning or customizing features until the batteries have been replaced.
This prevents the remote control from accidentally losing custom commands if
it's in a customization mode when the batteries run out.
To preserve battery life, set the LCD backlight to stay on very briefly (20
TIP
seconds or less). For instructions, see Chapter 5, "Settings."
IF THE BATTERIES RUN OUT
The remote control will retain your commands and settings in memory even
after the batteries run out. However, you should replace the worn batteries with
a fresh set as soon as possible.
After replacing batteries, you'll need to set the clock to the current time. For
instructions, see Chapter 5, "Settings."
10 Chapter 1—Batteries