Acer PackardBell Viseo 193ws Service Manual page 21

Battery indicator
•The 3D glasses have power for up to 70 hours of continuous use. Near the
end of the battery life, the indicator LED will flash 4times consecutively
every 1 minute and till the battery life is ended. When you turn on with
low power, LED will be light up for 5 second, then the 3D glasses will
shut down.
Battery replacement
• Make sure the positive terminals face outwards.
Changing the nosepiece
• 3D glasses come with three interchangeable nosepieces to give you a
comfortable fit. You should pull out the current nosepiece horizontally
and insert the one that fits you best.
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