Samsung GT-I9305 Quick Start Manual page 31

If your device has a camera flash or light, do not use it close to
the eyes of people or pets
Using a flash close to the eyes may cause temporary loss of vision or
damage to the eyes.
Use caution when exposed to flashing lights
While using your device, leave some lights on in the room and do not
•
hold the screen too close to your eyes.
Seizures or blackouts can occur when you are exposed to flashing
•
lights while watching videos or playing Flash-based games for
extended periods. If you feel any discomfort, stop using the device
immediately.
Reduce the risk of repetitive motion injuries
When you repetitively perform actions, such as pressing keys, drawing
characters on a touch screen with your fingers, or playing games, you
may experience occasional discomfort in your hands, neck, shoulders, or
other parts of your body. When using your device for extended periods,
hold the device with a relaxed grip, press the keys lightly, and take
frequent breaks. If you continue to have discomfort during or after such
use, stop using the device and consult a physician.
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Ensure maximum battery and charger life
Avoid charging batteries for more than a week, as overcharging may
•
shorten battery life.
Over time, unused batteries will discharge and must be recharged
•
before use.
Disconnect chargers from power sources when not in use.
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Use batteries only for their intended purposes.
•
Use manufacturer-approved batteries, chargers, accessories,
and supplies
Using generic batteries or chargers may shorten the life of your device
•
or cause the device to malfunction.
Samsung cannot be responsible for the user's safety when using
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accessories or supplies that are not approved by Samsung.