Existing users, 
iPhone replacement battery and tools for $25
Posted 26 February 2008 @ 10am in Guides/How-Tos
If you’re willing to void your iPhone’s warranty and risk serious, irreparable damage to the unit, you can undercut Apple’s price of a replacement battery by more than $60. USB Fever is now selling a replacement battery for the iPhone, with an accompanying toolset and installation instructions, for $25. Though the product selling page doesn’t mention it, this type of installation generally requiring soldering.
The iPhone uses the ame non-user-replaceable model as the iPod, meaning that when capacity diminishes to an unacceptable level, you will need to send your phone to Apple and pay $86 — a service fee of $79, plus $6.95 shipping — to replace the battery, use a third-party service (like iResQ’s) or attempt replacement yourself.
Apple says the battery will retain up to 80% of its original capacity after the 300-400 charge cycles and adds “You may choose to replace your battery when it no longer holds sufficient charge to meet your needs.”] All data stored on the iPhone is erased in the process. As such, maximizing the amount of time before replacement is necessary is of substantial concern. Users are also seeking to extend the time between iPhone charges by reducing power consumption, so we’ll attempt to address both issues.
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2 Comments
Posted by Chas_IC
26 February 2008 @ 11am
It doesn’t matter if the battery replacement causes a total data loss on the iPhone. All data is backed up on the Mac/PC it’s linked to with iTunes. Just make sure to sync your iPhone before replacing the battery.
Posted by libertyforall1776
26 February 2008 @ 12pm
So this replacement is 1400 mAh, how much mAh is Apple’s stock battery?
If I were to replace the battery, I would want a higher mAh rating — there are many higher mAh batteries for Palm Treos/Centros and still the same size — why not for iPhone?!