User's Manual

20
Chapter 1. Knowing Your Device
Optimizing the Power Performance
• Tap > Settings > System tab > Power > Advanced, and adjust the time for turning off
the device if it is not in use.
The backup battery powers a real-time clock (RTC) which keeps track of the time even when
your device is turned off. When the backup battery power is normal or full, it can keep
accurate real time for five minutes even if the main battery is removed and for up to 168
hours while the main battery is low.
The device contains a rechargeable Li-ion polymer battery completely discharged and
should be charged for at least 8 hours before first use. Use only manufacturer-specified
original batteries. Damages caused by using batteries not specified by manufacturer are not
covered under warranty.