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

[Rocko]

Actually, I believe the iPhone and most cell phone runs off a single cell Li-Ion as they are 3.7V. A single cell Li-Ion is 3.6 or 3.7v.

[h=2]Lithium-ion[/h] The nominal voltage of lithium-ion had been 3.60V/cell. This is a practical figure because it represents three nickel-based batteries connected in series (3 x 1.2V = 3.6V). Some cell manufacturers mark their Li-ion products as 3.70V/cell or higher. This poses a marketing advantage because of higher watt-hours on paper (multiplying voltage times current equals W). Italso creates unfamiliar references of 11.1V and 14.8V when connecting three and four cells in series.Let this higher voltage not cause confusion; equipment manufacturers will always adhere to the nominal cell voltage of 3.60V for most Li-ion systems, and the standard designation of 10.8V and 14.4V will always work.

 

[Skull One]

Actually, I believe the iPhone and most cell phone runs off a single cell Li-Ion as they are 3.7V. A single cell Li-Ion is 3.6 or 3.7v.

[h=2]Lithium-ion[/h] The nominal voltage of lithium-ion had been 3.60V/cell. This is a practical figure because it represents three nickel-based batteries connected in series (3 x 1.2V = 3.6V). Some cell manufacturers mark their Li-ion products as 3.70V/cell or higher. This poses a marketing advantage because of higher watt-hours on paper (multiplying voltage times current equals W). Italso creates unfamiliar references of 11.1V and 14.8V when connecting three and four cells in series.Let this higher voltage not cause confusion; equipment manufacturers will always adhere to the nominal cell voltage of 3.60V for most Li-ion systems, and the standard designation of 10.8V and 14.4V will always work.

Nominal isn't peak 100% charge. Which for cell phones is 4.2 volts.

 

[Rocko]

Nominal isn't peak 100% charge. Which for cell phones is 4.2 volts.

Yes, the max voltage during a charge is 4.2v. Still a single cell.

Charge

Discharge

Operating Temperate

Storage

Life Expectancy

[TD="colspan: 3"] Lithium Ion Cell Specification [/TD]

[TD="colspan: 2"] Nominal Voltage[/TD]
[TD="width: 290"] 3.7V[/TD]

[TD="colspan: 2"] Nominal Capacity[/TD]
[TD="width: 290"] 190mAh to 1800mAh‡[/TD]

[TD="width: 73"] Method[/TD]
[TD="width: 290"] Constant Current (CC) / Constant Voltage (CV)[/TD]

[TD="width: 73"] Max. Current
[/TD]
[TD="width: 290"] 1C
[/TD]

[TD="width: 73"] Max. Voltage[/TD]
[TD="width: 290"] 4.2V†[/TD]

[TD="width: 73"] Max. Current[/TD]
[TD="width: 290"] 1C[/TD]

[TD="width: 73"] Termination[/TD]
[TD="width: 290"] 3.0V†[/TD]

[TD="width: 73"] Charge[/TD]
[TD="width: 290"] 0ºC to +45ºC[/TD]

[TD="width: 73"] Discharge
[/TD]
[TD="width: 290"] -20ºC to +60ºC
[/TD]

[TD="width: 73"] 3 months[/TD]
[TD="width: 290"] -20ºC to +45ºC[/TD]

[TD="width: 73"] 12 months
[/TD]
[TD="width: 290"] -20ºC to +25ºC
[/TD]

[TD="width: 73"] Minimum ¥[/TD]
[TD="width: 290"] >300 cycles (80% rated capacity)[/TD]

[TD="width: 73"] Typical[/TD]
[TD="width: 290"] 500 cycles (see graph below)[/TD]

 

[hgratt]

O.K., to summarize numerous posts, is it not true then, that if cell phone batteries are single cell (i.e., the iPhone), then no deep discharge conditioning is necessary for the battery? However, it is required to calibrate the battery meter.

Thanks,
Harvey

 

[Rocko]

Thats the way I see it. Don't always drain until it powers off, top up whenever.

 

[Skull One]

O.K., to summarize numerous posts, is it not true then, that if cell phone batteries are single cell (i.e., the iPhone), then no deep discharge conditioning is necessary for the battery? However, it is required to calibrate the battery meter.

Thanks,
Harvey

And that is why I SPECIFICALLY worded this post - http://www.iphoneforums.net/forum/i...m-4s-iphone-4-a-25149/index18.html#post137356 - the way I did and tried to end the discussion back then.

 

[Rocko]

Well I for one am glad we discussed the battery. I learned a bit more. Now 5.0.2 is scheduled to come out in a couple of weeks, hopefully it will put an end to the battery problem.

iOS 5.0.2 coming very soon, solving the battery bugs. Should arrive before the end of next week. Apple is working hard on the update. In addition Apple ist working on the first big iOS 5 Update (iOS 5.1), bringing some siri-extensions. Also the Siri hardware-control is in work "take a picture", "make a video", "switch on/off WiFi", "switch on/off BT" and more.

 

[Skull One]

Well I for one am glad we discussed the battery. I learned a bit more. Now 5.0.2 is scheduled to come out in a couple of weeks, hopefully it will put an end to the battery problem.

iOS 5.0.2 coming very soon, solving the battery bugs. Should arrive before the end of next week. Apple is working hard on the update. In addition Apple ist working on the first big iOS 5 Update (iOS 5.1), bringing some siri-extensions. Also the Siri hardware-control is in work "take a picture", "make a video", "switch on/off WiFi", "switch on/off BT" and more.

That is a rumor. And one that I don't put much credence in considering I just logged in to the developer site and there is no mention of a beta.

 

[Rocko]

That would make sense. I am sure we will see 5.0.2 but you would know before we would. Didn't the 5.0.1 take about a week after you received it?

 

[Skull One]

That would make sense. I am sure we will see 5.0.2 but you would know before we would. Didn't the 5.0.1 take about a week after you received it?

5.0.1 was rushed because of the Charlie Miller incident. If they didn't close the hole he found, running unsigned code would have taken on a whole new interesting life for iOS.

 

[Rocko]

Ahh, I recall hearing about him. Patch the hole and throw on some 'battery fixes' to quite the masses and buy them some time for the real fix I hope.

 

[Skull One]

This is interesting - http://www.iphoneforums.net/forum/s...-2-battery-woes-ios-5-1-siri-additions-26834/

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."

If that statement is actually true, that ends any discussion of this being a hardware issue. It is all in iOS.

 

[Darkstar2007]

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.

 

[Skull One]

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.
Envy.
You.

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

 

[p3unit32]

What did you do to get your phone exchanged? Did you have to make a big deal in order to so?

I really didn't do much of anything. I went two days in a row and told them that the battery obviously shouldn't be draining so rapidly with having restored the phone as new. The rep didn't want to do it, and took me through the same scenario you was taking through. But in the end he offered to change it out, and so far so good. I don't really get the numbers Skull mentioned, I'm about an 1.5hrs shy of it. Like Skull mentioned earlier things could be worse, and I want make mention of android. Apple will get this thing taken care of soon enough. I understand how you feel about your investment, which is how I was starting to feel as well. Hang in there, and I hope things will work out for you with your phone.