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Standby Battery Time

T

theBigD23

macrumors 6502a
Original poster
Sep 13, 2008
609
115
I had my iPad on standby for about 12 hours and I dropped about 8% in battery. Is this normal? Seems like it should go slower than that.
 
theBigD23 said:
I had my iPad on standby for about 12 hours and I dropped about 8% in battery. Is this normal? Seems like it should go slower than that.
Click to expand...

Apple claimed a standby battery life of 30 days. That's 720 hours, so it should drain about 0.14% per hour, or nearly 2% in 12 hours.

Good luck with that :eek:
 
Can other people let me know what they are getting? My actual usage of battery seems correct but not the standby.
 
Do you have it set up to check email at a certain interval? I'd guess that they didn't have any of that turned on when they got their numbers.
 
Yeah, that definitely seems like too much. Mine drains somewhere around 1%-2% overnight while I sleep (although normally I'd have it charging during that time). Maybe some push email setting or something that keeps the radio active? Or maybe you have the iPod module playing music in the background and didn't realize it because the volume was down?
 
diabolic said:
Do you have it set up to check email at a certain interval? I'd guess that they didn't have any of that turned on when they got their numbers.
Click to expand...

Yes, I do have emailed check every 15 minutes and I have my MobileMe do push. Would it really have that much of an impact on battery?
 
I actually checked and I only had fetch on, not checking every 15 minutes. I will charge now to 100%, turn everything off in Mail, and take out all Safari windows. If it still does it, then I def. have an issue. 3% should be max.

If anyone else is having issues, or has standby numbers, please post.
 
Does standby mean shutting down all together by sliding to power off or just pressing the top button?
 
Quick test results:

I turned off Push from the iPad, charged it to 100%, then at 10:30 last night, I unplugged the iPad. I checked this morning at 10:30 and it was still at 100%. Nothing like this happened before. I can't believe Push can have such a drain on a battery.

I then looked for the iPhone 3GS battery claims and saw 300 hours standby. No way the phone would make more than 2 days, the way I lose battery now while not using it, so the push+checking every 15 minutes on the iPhone really kills battery.

I'm going to leave the iPad another 6 hours just to see. I know the iPad stays at 100% longer, but the night before I dropped 8%, so I would expect around half that. Hope this helps.
 
I charged my ipad up to 100% overnight and woke up at around 6 am and unplugged it and took it to work with me and left it in my trunk. I never turned it on all day and when I finally got home around 6 pm, it was still at 100%. I was shocked to say the least. I don't have mail set up, so no fetch or push. It also wasn't conencted to any wifi.

I'm not sure if this is normal, but at that rate the standby time would be probably at least 30 days like Apple states.
 
So now we know that the battery drainer was the push and fetch email functions.
 
theBigD23 said:
Quick test results:

I turned off Push from the iPad, charged it to 100%, then at 10:30 last night, I unplugged the iPad. I checked this morning at 10:30 and it was still at 100%. Nothing like this happened before. I can't believe Push can have such a drain on a battery.

I then looked for the iPhone 3GS battery claims and saw 300 hours standby. No way the phone would make more than 2 days, the way I lose battery now while not using it, so the push+checking every 15 minutes on the iPhone really kills battery.

I'm going to leave the iPad another 6 hours just to see. I know the iPad stays at 100% longer, but the night before I dropped 8%, so I would expect around half that. Hope this helps.
Click to expand...

Think of it this way -- if your iPad "turns on" for 30 seconds every 15 minutes to go out and fetch your email, it's going to be on for 25 minutes out of 12 hours. That's 4.2% of the published 10 hour battery life. If the standby usage is ~2% over 12 hours, you're pretty close to the usage you observed. If the time for each temporary wake cycle is 45 seconds, or if "push-ready standby" uses twice the power of regular standby, you've got it.
 
theBigD23 said:
Nothing like this happened before. I can't believe Push can have such a drain on a battery.
Click to expand...

Yeah, but Push saves us all from evil multi-tasking!. Sure, it drains the battery 4x as fast when you aren't even using the device, but, but multitasking (evil)!
 
marlys said:
Think of it this way -- if your iPad "turns on" for 30 seconds every 15 minutes to go out and fetch your email, it's going to be on for 25 minutes out of 12 hours. That's 4.2% of the published 10 hour battery life. If the standby usage is ~2% over 12 hours, you're pretty close to the usage you observed. If the time for each temporary wake cycle is 45 seconds, or if "push-ready standby" uses twice the power of regular standby, you've got it.
Click to expand...

Very true, the only thing is that my Fetch email was on Manual, ONLY my Push was on. I guess the constant contact with the server and just the fact that WiFi is on really kills the battery. I wonder if having multiple accounts with Push on will make it exponentially worse or just a little more worse. Is it mainly the WiFi that's killing it or the connection to the email server? Could work either way.

I also just checked and 17 hours later it's at 100% STILL.
 
I'm having an iPad Air 2..........it's main purpose is to use garage band.....to develope tat.....I'm in an I dea of buying a mac r MacBook.....which will be good for GarageBand or !!!!,...I'm in an idea of starting my YouTube page!
 
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