Sony VGC-LV170J - Manual (Page 27)

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Getting Started
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You can check the battery indicator ( or ) in the LCD window on the wireless keyboard for its battery power level.
If the wireless keyboard does not operate properly, the batteries may need to be replaced. If you do not intend to use the wireless keyboard for an
extended period of time, remove the batteries to avoid possible damage from battery leakage.
If you want to put the wireless keyboard in a more 'ergonomic' position, flip open the keyboard feet.