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H19 - User Manual - Electronic Reading Systems Ltd.

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Chapter 1. Knowing Your Device<br />

The backup battery powers a real-time clock (RTC) which keeps track of the time even when<br />

your device is turned off. When the backup battery power is normal or full, it can keep<br />

accurate real time for five minutes even if the main battery is removed and for up to 1 8<br />

hours while the main battery is low.<br />

Optimizing the Power Performance<br />

• Tap > Settings > System tab > Power > Advanced, and adjust the time for turning off<br />

the device if it is not in use.

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