I recently installed iOS4 on my iPhone 3G which is on the Three network. After installing my battery life was reduced from 50 hours to around 20 hours.
As I live out in the sticks with no 3G coverage, I usually disable 3G which improves battery life. Mostly due to the iPhone not continually trying to get a 3G signal. I know disabling 3G violates Three's T&Cs.
Since upgrading to iOS4, the "Enable 3G" option is no longer available in network settings. When I installed iOS4, I opted to upgrade Three's carrier settings which contained the rule to hide "Enable 3G".
Reinstalling iOS4 and not upgrading the carrier settings allows me to see the "Enable 3G" setting.
I expect the carrier profile (Hutchison_uk.ipcc) for Three can easily be edited using Apple's Configuration Utility.
Tuesday, 29 June 2010
Tuesday, 2 March 2010
Avoiding battery damage with Windows 7
My Acer Aspire netbook is great. Originally shipped with a Linux distribution, I quickly installed Windows XP. Being slightly paranoid, I locked the hard disk requiring a password to boot up.
A few months ago, XP was replaced with Windows 7. Unusually, my laptop started running out of power without being used. Within weeks Windows7 started complaining about my laptop's battery, that it needed replacing.
When batteries reach 0% charge, they get damaged. I could not determine why my battery kept discharging with Windows 7. The event logs in Windows 7 didn't contain any information,
Eventually I realised that Windows 7 quite often boots a computer out of standby or hibernate, and having a hard disk password on boot, meant the computer was stuck requesting this password. This was discharging my battery to 0%.
A costly mistake having a hard disk password with Windows 7. Hope this post helps someone else.
A few months ago, XP was replaced with Windows 7. Unusually, my laptop started running out of power without being used. Within weeks Windows7 started complaining about my laptop's battery, that it needed replacing.
When batteries reach 0% charge, they get damaged. I could not determine why my battery kept discharging with Windows 7. The event logs in Windows 7 didn't contain any information,
Eventually I realised that Windows 7 quite often boots a computer out of standby or hibernate, and having a hard disk password on boot, meant the computer was stuck requesting this password. This was discharging my battery to 0%.
A costly mistake having a hard disk password with Windows 7. Hope this post helps someone else.
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