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Help Problem with Galaxy S

Hey guys i've just got this problem i finish loading the batery for my Samsung before i go to bed then i surf some on the web then i put it aside (I Turned the Wi-Fi off) And i had 92% batery left now when i wake up this morning i have 62% Does it take that much on the batery? Is there anything i can do to make it hold longer or i just got to turn it off by the night?
 
And i had 92% batery left now when i wake up this morning i have 62%

If you are trying to say that your phone lost 30% of the battery just in stand by then NO thats not normal. Complete usage profile for your phone would be appreciated like whether the GPS, 3g were on or off. Also it might be that some application prevented the phone from sleeping and thus drained the battery.


From my experience I have found that when you do nothing on phone (3g, GPS etc etc off) then the Phone standby+phone idle use 1% battery per hour.
 
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I'm trying to figure out my battery too, as i think it's draining quicker than it should. When i went to sleep at 1 am last night it was on 72% and this morning, at 7am, it was on 24% (it seems to be losing 4% every 30 minutes). I have Juicedefender enabled to data connect every 3 minutes. Background sync is on. Other than that the phone is on idle. This morning when i woke up, wi-fi was connected for some reason, and according to Juiceplotter, it had been connected for 30 mins.
Seems to me, 8% per hour is way too much, according to some of the above posts in this thread.

Another question: i used to charge my phone overnight, but since my phone is set to silent, i don't know when it's fully charged. I wonder if that killed the battery somehow, since i left it on 100% charge for a few hours?
 
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