Apple is aware of battery life problem on 4s and iphone 4

[p3unit32]

Well my battery life has improved a great deal with iOS 5.0.1

My battery has actually never been this good before. This was with moderate web surfing, moderate texting, and two 15 min. Phone calls, and poor 3G coverage for about 3 hours and the rest was excellent 3G coverage.

I'm satisfied.

I'll bet! That is good.

 

[Darkstar2007]

I.
Envy.
You.

Seriously, those numbers are beyond anything I could have ever predicted for iOS 5.0.1 on the iPhone 4.

Me too.

This was with an iCloud restore after my upgrade. I didn't manually sync anything.
I'm shocked as well, but I'm not gonna complain at all. .

My usage time with iOS 5.0 was about 4 hours of usage and 7 standby. This was more than a substantial upgrade IMO. that's why I'm gonna have to agree its not a hardware issue plaguing users. Even users with a 4S. I'd be more inclined to believe it was a hardware issue if iPhone 4 users weren't reporting poor vs good battery life after upgrading.

 

[hgratt]

Well, yes. But you didn't word that 1st sentence quite right. You need to get rid of one of the 'not's in the first sentence. It's as Skull and I have said from the start.

But - I will have to stand corrected though that an iPhone is 'single cell'. I thought for sure it was multi. That was my error here. Apologies - all.

I guess the next question then pertains to multi-cell Li-Ion batteries as used by laptops:

Since it appears from the references that cell-leveling is performed in the battery's charging circuit (all the time?), would not the same conclusions hold?
That is that no user based deep discharge conditioning is required (i.e., drain to zero and then charge full) for the battery, but is required for calibration of the battery meter.

Thanks,
Harvey

 

[Rocko]

I guess the next question then pertains to multi-cell Li-Ion batteries as used by laptops:

Since it appears from the references that cell-leveling is performed in the battery's charging circuit (all the time?), would not the same conclusions hold?
That is that no user based deep discharge conditioning is required (i.e., drain to zero and then charge full) for the battery, but is required for calibration of the battery meter.





Thanks,
Harvey

From what I have read on laptop batteries, yes, for the meter.


As to the 6hrs usage with more than 50% battery left I will assume this is music, not 3d gaming or internet.

 

[Darkstar2007]

As to the 6hrs usage with more than 50% battery left I will assume this is music, not 3d gaming or internet.

If you had read my entire post, you would see there was moderate Internet surfing.

Your correct about 3D gaming. I haven't played any 3D games during this charge.

 

[Rocko]

If you had read my entire post, you would see there was moderate Internet surfing.

Your correct about 3D gaming. I haven't played any 3D games during this charge.

Oh, it's a 4 not a 4s, that would explain it. Great numbers.

 

[Darkstar2007]

Oh, it's a 4 not a 4s, that would explain it. Great numbers.

Thank you.

I haven't seen numbers like this on my CDMA iPhone 4 since I purchased it in February. I'm quite satisfied. I'm gonna take all of my research, and others research from this thread and update the battery life sticky in the iPhone FAQ forum by this weekend.

 

[microsnook]

So apple is releasing a new update, 5.0.2 within a week, and they claim to have, "The report claims that Apple's internal goal is for iOS 5.0.2 to provide iPhone 4S users 40 hours of standby with 10 hours of active use. It said that the update will arrive "no later than next week."

Anyone testing this now?

 

[Darkstar2007]

This is my final battery screenshot for this charge. I'm quite pleased with it.

This was with moderate Internet surfing, moderate texting. About 45 min worth of phone calls, and moderate 3G data use in apps like this. 5.0.1 is working fine for me.

 

[hgratt]

No. Chemical processes are different in multicell. Re-read Skull's explanation several pages back. It's explained well.

I may be wrong, but it seems to me that Skull's response and the information in the references imply that the on-board battery circuitry performs the multi-cell leveling during every discharge/charge cycle - so deep discharging (except for battery meter calibration) is not needed. I guess we'll need to wait for Skull's response on what he meant.

Thanks,
Harvey

 

[sekelani]

This is probably my worst usage and stand by ever

 

[p3unit32]

This is my final battery screenshot for this charge. I'm quite pleased with it.

This was with moderate Internet surfing, moderate texting. About 45 min worth of phone calls, and moderate 3G data use in apps like this. 5.0.1 is working fine for me.

Nice results!

 

[Skull One]

No. Chemical processes are different in multicell. Re-read Skull's explanation several pages back. It's explained well.

I may be wrong, but it seems to me that Skull's response and the information in the references imply that the on-board battery circuitry performs the multi-cell leveling during every discharge/charge cycle - so deep discharging (except for battery meter calibration) is not needed. I guess we'll need to wait for Skull's response on what he meant.

Thanks,
Harvey

As I have stated already BOTH answers ARE IN FACT correct and defensible. You have to look at the following:

The era of the batteries manufacture, the chemicals used in the cell, the batteries manufacturing process, the patents used in the design, the charging circuit design and the charger's design.

Without that very specific information you can only speak in general terms which is what allows for so much ambiguity and for two answer that "on the surface" look contradictory but in fact are 100% correct until applied to a very specific battery and its application in a device.

So unless someone plans to go research these criteria and present a very specific case, this subject really needs to die so we can get 100% back on topic.

 

[moebius_001]

I would say that the 3d games are probably the biggest drain on the battery. That or watching / recording video. That also cooincides with what Battery Magic Pro application shows for expected run times of different features of the smartphone (I.E. 2g/3g talking vs Recording / Playing video vs Playing video games. With that being said, if someone were to be playing 3D games constantly on one charge, I don't think they should expect more than 5-6 hours on a single charge. I see my battery percent go down much quicker when I load up Dungeon 2 or Real Racing 2 compared with just surfing the web or checking email. Wouldn't it make sense that the more CPU intensive the application the faster the battery will drain? Plus, what about having dual cores? Doesn't that take more energy to operate it?

 

[Skull One]

Ok, bizarro world has visited my iPhone 4S and iOS 5.0.1 final.

Usage 6 Hours and 14 Minutes.
Standby 15 Hours and 47 Minutes.

Battery life remaining: 44%

I have NO CLUE how this is happened. I didn't change anything. And for the previous four days I would be at maybe 15% battery left if I was lucky. Heck even my wacky math says I should only have 32% battery left under ideal conditions.