Q: I heard that the iPhone can only be charged 300 times and then the battery dies. Is that true?

A: No. Lithium-ion batteries are good for 300 to 500 charge/discharge cycles. Some interpret this as meaning that if an iPhone is charged daily, it could need a new battery in as little as 300 days. That is incorrect. First, a partial charge does not represent a full charge/discharge cycle. For example, if an iPhone's battery level is at 75% and it is charged, that can be thought to account for a quarter of a single discharge cycle. Second, a lithium ion battery gradually degrades; it will not simply stop functioning after a certain number of cycles. Apple's official position is that the battery will retain 80% of its life after 300 to 400 cycles. After a certain point, some customers may begin to feel it is time to consider battery replacement. However, for many customers, that time will not come for at least two years or more, at which point many customers will already have purchased a new handset. For others, battery replacement options are available.

Q: What kind of battery does the iPhone use?

A: The iPhone uses a lithium ion battery, as do nearly all mobile phones and portable devices. Dissassembly by iFixit reveals that iPhone uses a 3.7V 1400 mAh Lithium Ion Polymer battery, with manufacturer part number L1S1376APPC, and Apple service part number 616-0290. Dissassembly by Think Secret reveals a similar 3.7V 1400 mAh Lithium Ion Polymer battery, but with manufacturer part number P11G59-01-S01 and Apple service part number 616-0291. The differences, if any, between these batteries are not known at this time.

Q: How long does the iPhone battery last?

A: The iPhone specifications state:

* Up to 8 hours talk time
* Up to 250 hours standby
* Up to 6 hours internet use
* Up to 7 hours video playback
* Up to 24 hours audio playback

A press release has some additional information and comparisons about iPhone battery life.

Q: I heard the iPhone battery "only lasts 40 minutes." Is that true?

A: No. This rumor came from John Dvorak, who openly admits to trolling Apple users to get attention for his articles. He provided no proof, and cited an anonymous person at Cingular who claimed they were testing the phone. iPhone, like many other products in its class, other similar smartphones, and so on, uses a standard lithium ion battery. While manufacturers routinely state battery life specifications under optimal conditions, reviews have found that actual battery performance under good conditions is not significantly different from what Apple has already stated in the specifications.

Cell phones dont genreally have a certain battery life and it verys on how you take care of it and what kind of battery it is can tell you a slight quality but dosnt give you to any degree