iPhone battery life

my first full day of use suggests that battery life is gonna be a problem for me. it’s 8:45p now, and i’ve got maybe 10% of my battery life left — that’s after leaving the house 13 hours ago (that’s when i remember unplugging my phone).

having said that, the phone is showing 14 hours 18 minutes of standby time (which might be right, since it’s about when i woke up this morning — very possible i started using it right away), and 6 hour 19 minutes of use, which i guess includes everything.

26 minutes on the phone, and about 6.3 MB of data received over EDGE and 1.1 MB sent.

we’ll see what happens in the days ahead (and how much longer the phone lasts now), but i think this may be a problem for me. today, like all mondays, was an active day — i didn’t get to sit much at my desk, and so was checking my mail a fair bit (and doing demos), but after about 4p, i found myself really watching the battery meter a lot and thinking that if i had been talking on the phone more or using the ipod more that it’d be even lower.

i have a couple of ideas on why it depleted so quickly — i have 2 e-mail accounts set to check every 15 minutes, and mostly stayed within WiFi range of the office all day (and i have it set up to auto-join WiFi networks that it recognizes).

i think the way the WiFi works is that it connects when it needs to (to check e-mail or something) and then disconnects after a period of inactivity — if WiFi drains significant power (and that’s my guess) then i may have effectively kept the WiFi power drain on for most of the day. i may move e-mail checks to every 30 minutes and change the brightness setting a little bit for tomorrow — that would reduce the load, i think.

anyway, we’ll see, but a little troubling for the first day. lots of other things i noticed — mostly i really like using it, and the pictures of my family on the main screen & when they call really brighten my day — they’re just shown in a vivid, fun way.

so hopefully i’ll be able to figure out a way to get the battery life more workable…

11 Replies to “iPhone battery life”

  1. hey john, I can already see the conflict coming between an itchy email finger and a longer 30 minute retrieval setting :)…mix in a few more diet cokes and a serious iPhone twitch might start to develop!p.s. – great blog!

  2. hey john, I can already see the conflict coming between an itchy email finger and a longer 30 minute retrieval setting :)…mix in a few more diet cokes and a serious iPhone twitch might start to develop!

    p.s. – great blog!

  3. found this on another blog……the key battery killing features may indeed be the Auto-WiFi as well as the Auto-Brightness features. “Apple’s hyper-detailed documentation of how it came up with its battery-life estimates: Video Playback: Testing conducted by Apple in May and June 2007 using preproduction iPhone units and software. Video content was a repeated 2 hour 23 minute movie purchased from the iTunes Store. All settings were default except: Call Forwarding was turned on; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

  4. found this on another blog……the key battery killing features may indeed be the Auto-WiFi as well as the Auto-Brightness features.

    “Apple’s hyper-detailed documentation of how it came up with its battery-life estimates:

    Video Playback: Testing conducted by Apple in May and June 2007 using preproduction iPhone units and software. Video content was a repeated 2 hour 23 minute movie purchased from the iTunes Store. All settings were default except: Call Forwarding was turned on; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off.

  5. I can tell battery life is gonna be a problem for me too. Having to charge every night it’s gonna wear out fast. I did some looking and found an option besides apple’s $85 replacement though, ipodjuice.com just added iPhone battery replacement.

  6. Hi,Well I got apple battery from a local store, and opened my iPhone, but unfortunately i messed up alot of things, i plucked the battery, without nowing that i will damage the circuit, as you can see the bellow images, i have spent more then 10 hours continuous to solve the problem. Let me explain it to you guys….details and circuit diagram onhttp://aamirrajpoot.wordpress.com/2008/03/19/ip

  7. I just got my phone 5 days ago and the battery doesnt last longer then 24 hours. i took it to an apple store and they said they will only replace it with a refubished one because i bought it at an AT&T store. I took it to the AT&T store and they said they will only replace the deffective phone they sold me if i PAY THEM a restocking fee. I expected that kind of dirty business practice from AT&T but not from Apple. Im very dissapointed in the Battery Life on this $400 phone and even more dissapointed that both companies who sell this phone are unwilling to do anything about. Whats the point of having all those features on the iPhone if the battery cant handle it? Apple has failed me once again. Just as it did in the 90s with their crap computors.

  8. I just got my phone 5 days ago and the battery doesnt last longer then 24 hours. i took it to an apple store and they said they will only replace it with a refubished one because i bought it at an AT&T store. I took it to the AT&T store and they said they will only replace the deffective phone they sold me if i PAY THEM a restocking fee. I expected that kind of dirty business practice from AT&T but not from Apple. Im very dissapointed in the Battery Life on this $400 phone and even more dissapointed that both companies who sell this phone are unwilling to do anything about. Whats the point of having all those features on the iPhone if the battery cant handle it? Apple has failed me once again. Just as it did in the 90s with their crap computors.

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