I originally posted this to the wrong thread and decided afterwards that it probably deserved its own thread.
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I have an IPH4 running iOS 4.2.1 w/GreenPois0n RC6.1 and prior to that, I ran iOS 4.1 with Limera1n exclusively.
I searched high and low prior to upgrading to 4.2.1. Many posts and comments were very vague concerning the battery life for GreenPois0n and I must admit, I was a touch gun-shy and very reluctant to upgrade.
I did not have very good battery life on 4.1 (Limera1n). My settings were brightness at 45%, Wifi off (on only when needed), push on, bluetooth off, and location off. I do not use lock-screen or any Winterboard theming Typically, if I started my day at 6 am, I would be at 20% battery life by 1 pm.
After switching to 4.2.1 (GreenPois0n) and the same settings, I must say that I am very impressed with the overall battery life. During the same testing day from around 6 am to 1 pm, i have well over 65% battery life left. I can make it to around 5 pm with around 20% battery left. Can I squarely attribute this to 4.2.1? Possibly. If you search the Net for "iOS 4.2 network optimization," you will find some information regarding how iOS 4.2x is far more efficient on various networks which is in turn supposed to improve battery consumption.
Regardless, I am very pleased.
Just as a note, both iOS 4.1 and iOS 4.2.1 were installed cleanly and as a "new" phone. I did not restore via any previous backups.
I hope this assists you.
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I have an IPH4 running iOS 4.2.1 w/GreenPois0n RC6.1 and prior to that, I ran iOS 4.1 with Limera1n exclusively.
I searched high and low prior to upgrading to 4.2.1. Many posts and comments were very vague concerning the battery life for GreenPois0n and I must admit, I was a touch gun-shy and very reluctant to upgrade.
I did not have very good battery life on 4.1 (Limera1n). My settings were brightness at 45%, Wifi off (on only when needed), push on, bluetooth off, and location off. I do not use lock-screen or any Winterboard theming Typically, if I started my day at 6 am, I would be at 20% battery life by 1 pm.
After switching to 4.2.1 (GreenPois0n) and the same settings, I must say that I am very impressed with the overall battery life. During the same testing day from around 6 am to 1 pm, i have well over 65% battery life left. I can make it to around 5 pm with around 20% battery left. Can I squarely attribute this to 4.2.1? Possibly. If you search the Net for "iOS 4.2 network optimization," you will find some information regarding how iOS 4.2x is far more efficient on various networks which is in turn supposed to improve battery consumption.
Regardless, I am very pleased.
Just as a note, both iOS 4.1 and iOS 4.2.1 were installed cleanly and as a "new" phone. I did not restore via any previous backups.
I hope this assists you.
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