A day after the iOS 4 was released I upgraded my iPhone 3Gs to benefit from all the new features. I was delighted with the new Cellular Data switch – it allowed my iphone to be a real phone and last for days not merely hours, all due to the GPRS/3G not abusing the battery.
Unfortunately one of the “features” in iOS4 turned out to be an even worse battery abuser – the persistent Wi-Fi. While I was at home or in the office – about 20 hours of my average day – the phone was constantly connected to the Wi-Fi and the battery lasted for 15-16 hours tops, with no more than an hour of actual usage!
So far there is no “Persistent Wi-Fi” switch, so I set on finding out what caused this behavior, and here is what you need to do to get it off:
- Disable notifications (yes, no more knowing when someone wrote on your Faceboko wall or mentioned you on twitter)
- Disable any Push e-mail, from the list of e-mails (Exchange, GMail, Yahoo, etc.), not just the Push switch in Settings -> Mail -> Fetch New Data!
If you are using Exchange (or Gmail/Google Apps) you’ll also need to disable your calendar and contacts unfortunately. In other words you have to switch to IMAP/POP e-mails.
This feature, unfortunately, makes you chose between having Push e-mail and notifications or manually turning on and off the Wi-Fi every time you need it, just like those nasty Symbian phones, the iPhone claims to be superior to!
UPDATE: after ten days I have to admit – I was wrong. Probably one of those nasty background-running apps was keeping the Wi-Fi connected at all times. Now I close most of my apps after I’m done with them and battery indeed lasts for 2 days and about 3 hours of use! Cheers!
They should’ve removed that image on apple.com:
from the Apps for travelling, apps for losing your iPhone prototype page.
Or else I wouldn’t be able to do this:
The App, Gray Powell did not have
ОК, заглавието е подвеждащо – не че не ме кефи изцяло, кефи ме, но не и най-важната за мен част – пощата. Личните ми пощи на kirichkov.com и simplicity.bg изискват периодично да ги проверявам. С Nokia-та писмата се получаваха преди дори десктопа ми да се е усетил, а с Ябълката – ами и аз не знам – но може да има забяване и до 15 минути, тъй като това е най-краткия интервал през който да се проверяват пощенските кутии, освен ако не дам пари за MobileMe или не пренасочвам писмата си към Yahoo Mail, който пък поддържал ””push”” e-mail (кавичките са умишлено двойно, защото от Yahoo ползват някаква друга заобикална на де факто сандарта :).
Не ме кефи идеята да се мъчат да ме накарат да си плащам за mobileMe, напук няма да си го пусна, макар и да го планирах :))