Apple increased the battery size of iPhone 5S by 10% and iPhone 5C by 5%

AnandTech has reported that the Apple has already increased the battery size of iPhone 5S by 10% and iPhone 5C by 5% as per leaked in FCC filing. Apple claims  that iPhone 5S battery ensures a 10 hours of 3G talk time while iPhone 5 can only make it upto 8 hours on 3G. iPhone 5 was having 225 hours of stand-by while we have 250 hours on iPhone 5S and iPhone 5C. AnandTech reported the following:

It turns out that there are in fact some battery size increases for both the 5S and 5C if the FCC disclosure is to be believed. While I’m somewhat skeptical sometimes of the accuracy of battery capacities as reported in FCC disclosures (which I noted about the battery size for the Nexus 5), these numbers seem credible given what I’ve heard, the statement Apple made during the keynote about the 5C battery size going up, and what I’d expect with some board re-layout for the 5S. The iPhone 5S ends up getting an almost 10 percent increase in size versus the iPhone 5, the iPhone 5C goes up around 5 percent versus the iPhone 5

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