If you've noticed that your iPhone 5S battery is quick to drain and slow to charge, you could be the owner of one of "a very limited number" of handsets that has a battery defect.
Apple has conceded that some of the new iPhones have a problem with their batteries, although it's not saying how many are affected beyond "a very limited number".
The company's spokeswoman, Teresa Brewer, told the NYT, "We recently discovered a manufacturing issue affecting a very limited number of iPhone 5S devices that could cause the battery to take longer to charge or result in reduced battery life."
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Apple is "reaching out" (contacting) those with affected phones to provide replacement handsets.
In our full TechRadar iPhone 5S review, we deemed the battery to be a little better than that of the iPhone 5's - specifically when it comes to standby life. However, actually using the handset still gulps that juice down like a hyperactive toddler on a hot day.
There's good news for non-defective iPhone 5S handsets though: "The iPhone 5S charges phenomenally quickly." Phenomenally.
- This all begs the question: why are mobile phone batteries still so crap?