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In Settings;
Mobile Network is OFF
Wi-Fi is ON
Wireless Standby is ON
Standby Screen is OFF
Power Management is ON
I never listen to music on the Sony
I use the wifi/3g only when plugged into the wall wart power source. I turn off wifi/3g when I'm done using the hardware switch.
I'll try putting a few books into RAM from the SD card and remove the SD card.
Why having the SD card in should drain the battery is beyond me: it's nonvolatile memory.
Thanks for the suggestions: I especially appreciate hearing from you who have had extensive battery life: my guess is that things are not right with my particular device.
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