Battery

Battery


Replacing the battery requires disassembling the iPhone unit and exposing the internal hardware
The iPhone features an internal rechargeable lithium-ion battery.


 Like an iPod, but unlike most other mobile phones, the battery is not user-replaceable.

 The iPhone can be charged when connected to a computer for syncing across the included USB to dock connector cable, similar to charging an iPod. 


Alternatively, a USB to AC adapter (or "wall charger," also included) can be connected to the cable to charge directly from an AC outlet. A number of third-party accessories (car chargers, portable chargers, battery cases, stereo dock chargers, and even solar chargers) are also available.

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Apple runs tests on pre production units to determine battery life. Apple's website says that the battery life "is designed to retain up to 80 percent of its original capacity after 400 full charge and discharge cycles", which is comparable to iPod batteries.


The battery life of early models of the iPhone has been criticized by several technology journalists as insufficient and less than Apple's claims.


 This is also reflected by a J. D. Power and Associates customer satisfaction survey, which gave the "battery aspects" of the iPhone 3G its lowest rating of tow out of five stars.


If the battery malfunctions or dies prematurely, the phone can be returned to Apple and replaced for free while still under warranty.


 The warranty lasts one year from purchase and can be extended to two years with Apple Care. The battery replacement service and its pricing was not made known to buyers until the day the product was launched,it is similar to how Apple (and third parties) replace batteries for iPods.




 The Foundation for Taxpayer and Consumer Rights, a consumer advocate group, has sent a complaint to Apple and AT&T over the fee that consumers have to pay to have the battery replaced.


Since July 2007, third-party battery replacement kits have been available at a much lower price than Apple's own battery replacement features.


 These kits often include a small screwdriver and an instruction leaflet, but as with many newer iPod models the battery in the original iPhone has been soldered in.


 Therefore a soldering iron is required to install the new battery. The iPhone 3G uses a different battery fitted with a connector that is easier to replace.


The iPhone two is the first generation to have two cameras. The LED flash for the rear-facing camera (top) and the forward-facing camera (bottom) are both unique to that model.
Camera.


The original iPhone and iPhone 3G feature a built-in fixed focus 2.0 megapixel camera located on the back for still digital photos.


 It has no optical zoom, flash or auto focus, and does not support video recording (iPhone 3G does support video recording via third-party App available on the App Store), however jail breaking allows users to do so.

 Version two point zero of iPhone OS introduced the capability to embed location data in the pictures, producing geo coded photographs.


                          The iPhone 3GS has a 3.2 megapixel camera, manufactured by Omni Vision, featuring autofocus, auto white balance, and auto macro (up to ten cm). 

It is also capable of capturing 640 × 480 (VGA resolution) video at  thirty frames per second, although compared to higher-end CCD based video cameras it does exhibit the rolling shutter effect.


 The video can then be cropped on the device itself and directly uploaded to YouTube, Mobile Me, or other services.


The iPhone 4 introduced a five point zero megapixel camera (2592 × 1936 pixels), also located on the back, which is equipped with a backside illuminated sensor capable of capturing pictures in low-light conditions, as well as an LED flash capable of staying lit for video recording at seven hundred p resolution, considered high-definition.


 iPhone four is the first iPhone that has the high dynamic range photography feature.

 In addition the iPhone four has a second camera on the front capable of VGA photos and SD video recording.


Regardless of the source, saved recordings may be synced to the host computer, attached to email, or (where supported) sent by MMS.

 Videos may be uploaded to YouTube directly.


The camera on the iPhone four S is capable of shooting eight MP stills and recording ten thousand eighty p videos. The camera can now be accessed directly from the lock screen, and the volume up button as a shutter trigger. The built-in gyroscope is able to stabilize the camera while recording video.



Beta code pulled from iOS 5 suggests that the next feature to be released will allow users to capture a panoramic photo on their iPhone.
On all five model generations, the phone can be configured to bring up the camera app by quickly pressing the home key twice.[92] On all i Phones running iOS five it can also be accessed from the lock screen directly.