4.0.2 guzzling my battery. Your's too?

Sam,

Yes thanks for your post, I do understand that it is ideal to deplete the battery until the phone shut it self off once a month to calibrate the accuracy. I have done that on first week of august as I got my phone at that time. Normally I don't fully discharge it during the middle of the month but there are times when I forget to charge heh? But yea I will be doing a calibration every first day of the month (well the day before the first of the month).

If you recall what I posted yesterday about my battery stats it was fine but when it hit about 75% that's when i started to see some drop. But then I had used the app called "Battery Doctor Pro". What that does is it records the data. It records the data where your % was when you plugged it.

Anyways I have found this app to be useless as it gets hot. The battery in the iphone 4 is located on the side where the volume switch and the vibration switch is, but I found that the micro-sim card slot of the location gets hot (as the processer or the ram is located there). Just last night I have charged the phone without the battery doctor pro running, and the phone did not get hot at all. So all these times I have ran the battery doctor pro and it was hot, but problem solved.

I have delete the app from my iphone, and never will I use that app again. I'll just mark my calander that I drain the battery every month. Sorry if this may seem long but some explaination to do as of why my phone was hot when charging but now it is fixed. I will drain the battery tonight because the fact that up until yesterday I have been using the battery doctor pro to charge my phone and found it not a good way. So going to start a fresh battery today.

I went through this research when I was having battery issues and unfortunately there is not a direct app that will help with battery life apart from anything that Apple may shift in their firmware updates. Battery Doctor Pro is just a lesson on how to keep your battery maintained.

Yes i know.

As for now from a full charge, Usage 11m standby 2 hours. and still at 100%. just on the 2 apps that I check every hour. but of course I have yet use it more to see if it will drop fast or not but as long as my battery last the entire day I'm satisfied with it. My 3G S can not go the entire day. By about 2-3 PM I would need to charge it. But I will drain my battery this time and see how long the battery actually last. Once I do i will take a screen shot of my battery stats once it hits 5%.

so your saying that becouse the phone was overheating when you were charging it that is what caused the faster drain of the battery?

i kinda got this idea when i noticed all my battery problems started right after i got my new speck candy shell and this is the first time i did not take it out of the case to charge it. i just left it in ,


i read on the apple battery page if the battery gets hot while charging it could make it not have such a good charge so they recomend to take off cases while charging.

The overheating on my iphone was not caused from the battery, I have tested, the left side of the phone (screen facing you, where the vibrating switch, volume buttons are) do get hot (note that the left side is where the ram and processor is, and the right side (where the battery is located)was cold so it's like half of my phone was hot and the other half wasn't, so technically my battery was not hot at all as I thought it would.

I do suspect that the app i was using uses processor and ram while charging becuase technically the app was running when charging to that it can record the data. But yea i have fixed my own issue. I'm going to drain the battery and start it as fresh.

My battery has started draining again 😟

Noticed a 10% drop just after charging last night between 00.00 and 07.00 on standby, wifi on, 3g on, etc etc which is kinda weird considering it's been great since my 2days and 18hour record last week on it's initial charge!

I have only done two further charges since then - one of which was a complete drain, the other was a top up from 10% which has now resulted in not showing my usage stats. Grrrrr...

Sam,

Here is my battery stat:

http://i7.photobucket.com/albums/y256/kwopau/photo-7.png

As you can see, seems like it's good, I only check the phone every hour with few apps.

I have deleted the battery doctor pro app and this is the result. With the app running I would only get about 40% by the end of the day (less then 24 hour standby). I do have everything turned off except 3G and wi-fi (wi-fi is on at school, but otherwise wherever I go, it's off). And the stats above is a light usage so if I use it light it would go for a day or so, but in heavy usage, probably less than that, but it depends on what I do of course.

But as long as the battery lasts me the entire day from 7 AM to whenever I sleep is fine with me, but if the battery is at 70% at night, i don't bother to charge it cuz i know that by the next day it will last me till the night. But I think i'm satisfied with mine. If in the future problem exists, I can always go to the apple store and have them replace just the battery since the back is removeable.

10% drop overnight?

Mine drops 50% in 8 hours in standby, from a full charge. Bluetooth, locations, push, fetch are all turned off. No apps in the tray. Airplane mode turned on, with wifi (so no cellular radio activity).

I WISH mine was only draining 10% overnight.

I've tried restoring and setting it up as a new phone, still the same problem. Pretty sure something's wrong with my battery. It gets very warm while charging.

Immediately after 4.02 my battery is "red line" in 3-4 days. Is there a way to go back to 3.x?

I am experiencing exactly the same problem!
Before I've upgraded to 4.0.2, my battery could last at least 2 days before recharging. That is, making calls (approx 30mins)plus using the 3G internet for at least an hour. However, after the upgrade, I had to recharge my phone everyday for a 10 mins voice call and 5 mins internet.

3-4 days is typically a normal usage. also there's no official way to downgrade the iphone 4 to 3.x.x as it comes with 4.0