Is your iPhone 6S running out of battery long before your mate's? This might by why. It turns out that there are two versions of the A9 processor - the chip that powers the device - in circulation, and one's more energy efficient than the other. © Digital Spy Best iPhone 6S deals: Where to buy the Apple iPhone 6S and iPhone 6S Plus Apple turned to both TSMC and Samsung to produce the A9 to avoid supply issues at launch, but reports suggest that the latter is lagging behind in the battery stakes. Posts on various internet forums and Chinese websites flagged up by Macrumours indicate that the Samsung chipset was found to offer two hours less runtime when put through its paces by the...
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