, Jim Young wrote

*snip*

What's your secret? I get about 1 day out of mine even with NFC turned off.

It's probably still calibrating. My battery ran out in 1 day initially...but after the first three times I let it run out, it better understood the capacity of the battery.

Also, Nokia Drive is a battery killer...make sure you stop the route or it will continue to find directions in the background.