Battery "Usage" time disappearing????

Loonytik

macrumors 6502a
Original poster
Jun 2, 2008
526
0
I've been monitoring my iphone 4 battery usage times religiously since I got the phone June 23rd. Until the last week I have been averaging roughly 5 hours and 45 minutes of "usage" and about 15-18 hours of "standby"(Great battery life in my opinion). Basically charging my phone in the late afternoon on the second day after a full charge.

The last several days I have been checking my usage throughout the day because I have noticed my battery draining faster than usual. The last two times I have looked I have shown somewhere in the 2 hour 30 min range down to 20% battery. When I check again the "usage" and "standby" times have magically disappeared. The phone shows blanks and "usage times will be shown after the iphone is fully charged." I charge my phone fully 99.9% of the time so the usage times should almost always show up.

Why are my usage times disappearing mid cycle?

Iphone 4, ios 4.0. (Purposely have not upgraded to 4.0.1.)
 

jman240

macrumors 6502a
May 26, 2009
734
77
have you rebooted it?

mine was doing this too, reboot helped.

also, got any background apps running, like ones that ping gps for your location?
 

SonoViva

macrumors 6502
Jun 8, 2010
273
13
CA
Mine was doing this too! Along with not marking emails as read when they clearly were. But yeah a reboot fixed it. Weird.
 

Loonytik

macrumors 6502a
Original poster
Jun 2, 2008
526
0
I've rebooted the phone a few times. I haven't tried doing a full restore through itunes yet though.
 
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