Sony 4-153-621-13(1) - Manual (Page 16)

PRS-600.GB.4-153-621-11(1)
16
Getting Started
Note
 If the remaining battery power is low, the following warning
appears. Charge the battery ( page 13 ).
If you continue to use without charging, the following warning
appears, and the Reader will turn off automatically.
Charge the Reader and turn it on again ( page 13 ).