[BoxDog]

Yeah - but the mechanics behind it - is a tcp session open all the time or something? I would assume so if battery life is depleted faster - the iPhone would be sending keepalives on a regular interval?

[dotnet]

Originally Posted by BoxDog

Yeah - but the mechanics behind it - is a tcp session open all the time or something?

Surely not, the infrastructure to support that would require a dedicated host (IP address) for every 64k iPhones using push.

I think the push signalling uses the same mechanism as incoming call signalling. I don't find it to be battery draining at all, but in my case the only push app at the moment is MobilMe mail, which is bugger all.

If you're using a push capable IM client and get messages every few seconds I absolutely believe that this would tax the battery, by constantly waking up the phone.

Cheers
Steffen.

EDIT Then again, maybe they are using IP connections (needing close to 500 hosts for 30M iPhones), and that's what gave them trouble getting up and running...

[BoxDog]

Originally Posted by dotnet

Surely not, the infrastructure to support that would require a dedicated host (IP address) for every 64k iPhones using push.

I think the push signalling uses the same mechanism as incoming call signalling. I don't find it to be battery draining at all, but in my case the only push app at the moment is MobilMe mail, which is bugger all.

If you're using a push capable IM client and get messages every few seconds I absolutely believe that this would tax the battery, by constantly waking up the phone.

Cheers
Steffen.

EDIT Then again, maybe they are using IP connections (needing close to 500 hosts for 30M iPhones), and that's what gave them trouble getting up and running...

I figured that a tcp connection stays open between the iPhone and some server (I dont know who's and I dont care). Keepalives are sent every x seconds/minutes to keep the session open (unless you're on Optus in which case the connection gets re-established every few minutes). That's the only traffic sent.

When an email/porn/whatever comes though, that's when the packets fly.

[Reubania]

I didn't know Find My Phone required Push! (....enables Push back on)

[dekco]

Originally Posted by Exocet

Just turn it off and never worry about it again - it'll do your mental health a world of good

i just turn my microwave at the switch to save power, since i have more than enough clocks in the house

but the % doesnt bother me. its just a number, and afterawhile you start to know how far you can push the phone before the battery dies on you

[Mecha]

I turn % off a couple days ago too.

I just hate having extra numbers on my top bar!

[skritter]

Originally Posted by dotnet

.....If you're using a push capable IM client and get messages every few seconds I absolutely believe that this would tax the battery, by constantly waking up the phone...

Just having the Push setting ON drains the battery even if you have nothing that uses the push feature to be updating for.

[dotnet]

It doesn't seem to make a noticeable difference, as far as I can tell (after 2 weeks of using push). I haven't benchmarked it, mind you, but subjectively I don't feel the battery life has changed at all.

Cheers
Steffen.

[Visionary]

I actually don't mind the percentage reading but a weird thing happened today. I charged the iphone yesterday evening, used it sporadically last night and it would have been around 90% when I went to bed. I left it on overnight, and when I woke up this morning and went to use it, I found the battery percentage and meter at 45%. Came into work and an hour later I went to use it and the battery percentage and meter climbed to 85% and thats where it is at now.

Have no idea why this has happened.

[rustyshelf]

Push requires an open TCP socket, that's just how it works. It doesn't use the normal call signaling it uses the data network. This means push on 3G should in theory use more battery life than push on Wifi/GPRS which may explain the difference in battery life some people experience?

In my case I find push on gives me about 40% less life than push off, in exactly the same usage patterns.

[jok3r]

the one thing i do like about the battery percentage is it tells me the percentage of the battery when charging.

The icon indicator doesnt tell you anything while its plugged into usb or power source. It just has a lightning bolt in the middle of the icon.

I hate having my iphone constantly plugged in. and not knowing the percentage of charge sucks too...one reason why i have the percentage on.

[Hamstor]

Originally Posted by Visionary

I actually don't mind the percentage reading but a weird thing happened today. I charged the iphone yesterday evening, used it sporadically last night and it would have been around 90% when I went to bed. I left it on overnight, and when I woke up this morning and went to use it, I found the battery percentage and meter at 45%. Came into work and an hour later I went to use it and the battery percentage and meter climbed to 85% and thats where it is at now.

Have no idea why this has happened.

I've been seeing similar results, the battery % sometimes jumps all over the place. It doesn't seem very reliable.

[black painter]

I find that leaving push on but turning off wifi makes a big difference

[the_doctor]

Originally Posted by black painter

I find that leaving push on but turning off wifi makes a big difference

I need Wifi more than I need push.

[Reubania]

Originally Posted by black painter

I find that leaving push on but turning off wifi makes a big difference

Cheers mate. This has significantly help conserve my battery! Instead of ending the day around 60% with very light use, it is now 80%!