Very Interesting Battery-Life Issue

CBJammin103

macrumors regular
Original poster
Jun 6, 2007
233
56
Louisiana, United States
I work at a hospital; typically during the work day, there are between 5 and 10 stories of concrete, electrical equiptment, and medical instruments between me and the open sky. As my hospital doesn't specifically support ATT, I have no cell-phone service in the large majority of the hospital.

When I first started using my iPhone at work (just leaving it on standby with the occasional wifi checkup on the 'net) I was getting [what I consider to be] terrible battery life. Just leaving the phone on standby and using it for non-'net things and a rare glance at the internet would have the battery at 15%-20% after the work day or so, which is anywhere from 8 to 10 hours.

"Okay," I thought, "It's just how the phone works."

Well, I decided to give something a test. I put the phone on airplane mode during the work day and used wifi for 'net access more than I typically did. The battery didn't budge throughout the whole day! So it seems that it was the "phone" part of the iPhone that was draining the battery. Strange...

Also, to note, now that I'm in a bit of off-time and have used the phone away from work more, it seems that only in my workplace does the phone's battery life suffer as described.

I can't give any specific usage numbers at this point, but is it possible that either the prolonged lack of cell-phone signal or something in the hospital's equipment was pushing my iPhone to use significantly more battery than normal?
 

KD7IWP

macrumors 6502a
Mar 8, 2004
648
2
American living in Canada
Yes, when PCS phones came out I remember hearing that they were one of the first phones to vary their radio tower by determining how far away they were. And so your iPhone is struggling to remain in contact with a tower.
 

Speedracer04

macrumors 6502a
Sep 8, 2006
617
0
Michigan
When the phone has little or no service it drains the battery much faster due to it trying to aquire a signal all the time. I dont know if this is the exact reason why, but I have had cingular/att for 7 years now and it has always been like that.

No signal=no battery life :(
 

ashVID

macrumors regular
Jun 30, 2007
239
0
Put it in flight mode or turn it off when you are not using it...



ash =o)
 

CBJammin103

macrumors regular
Original poster
Jun 6, 2007
233
56
Louisiana, United States
I thought as much... could this possibly be the answer to the "battery woes" of some iPhone users? Using the phone in a place where wifi, but not cell-tower signal, is available?

Vo-ip would be the best solution, perhaps. Never used it, but it seems that a vo-ip offering directly from ATT would be perfect. If would use your plan's minutes but give you cell-phone capability in hotspots that didn't get cell-phone signal from ATT.

For now, I'm just going to put it in flight mode when I know I won't be able to get any signal.