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Just a thought.... The battery test that Apple did never stated that they used headphones. When you use headphones, the iPhone has to use its battery to play the headphones. Here's my case: I have the 30gb iPod video. When I use my headphones, my battery life is around 2-3 hours. However, if I simply run an aux cord from the headphone jack to my car stereo, I can get 16 hours of playtime. I tested this because I live in Indiana and went to Texas for a vacation a few years back. After about 8 hours into the trip, I was completely blown away I still had half the battery left, so I started keeping track of time and ended up with 16 hours.

So back to the original point on the iPhone and the 30 hours of music playback. I would bet if you stuck an aux jack in the phone instead of a set of headphones, you would get a lot closer to 30 hours. Yes, I know that's not how anybody hardly ever listens to music on their iPhone or iPod devices, but it might clear up the confusion to that you think your iPhone cause you only get 9 hours or whatever it was.

IMO, I think it is 3g solely that destroys the battery. I'm not much of a talker on the phone, mostly texts and emails. I do play a lot of games on the phone as well. I can go two days on my battery if I either don't make a call or limit them to very short calls. If I make a 30 minute call on my phone while in 3g, it's a done deal for my battery. I have to charge that bad boy that night cause it won't make it through the next day. But like I said, just my opinion.

This is sound information. The iPhone would be responsible for amplification duties with headphones, while an auxiliary to a receiver would do the heavy lifting.

However, they with the included headphones when they achieve 30 hours.
 
Yes, but until Apple gets their act together, it's worth 3x the battery life.

3x? For the 3G or the 3GS? Really??

Well, I've got my contacts in address book, so no problem there. Syncing music, apps, and ringtones not too big of a deal. I'd have to redo my pics, but again, not too bad. I'd lose game saves, but that's not too big of deal, at least for me.

Notes might be a problem, since they're in the backup, and I have all kinds of stuff there. I've heard they sync somewhere, but not sure if you can get them easily. That would almost be a deal breaker.

IDK if I'm missing anything else to keep me from doing this.
 
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