ETen P300B Quick Start Manual page 39

7. Why my P300 is in vibration when I turn on the power?
Answer: This vibration is caused by the power insufficiency in backup
battery. The power in backup battery will be consuming when the main
battery power is running out. Therefore, you have to recharge main battery
so that the backup battery will be charged accordingly.
8. When should I turn off the backup battery switch?
Answer: When you have to idle P300 for at least two days without doing
any battery charging, you have to turn off the backup battery to secure the
battery life.
9. What is the light signals representing for in the indicator?
Answer: Light in green & flash means GSM is on and in standby. Light in
red means P300 is in power charge. Light in red but flash means battery is
low.
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