Does your iPhone 5s have short battery life? Apple might replace it

Apple’s(s aapl) new iPhone 5s is supposed to get up to 10 hours of battery life, but some users are experiencing results far short of that. Apple has acknowledged the problem, chalking it up to a manufacturing issue, and will replace all affected devices.

Teresa Brewer, an Apple spokeswoman, told the New York Times, “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. We are reaching out to customers with affected phones and will provide them with a replacement phone.”

So it appears that Apple is aware of exactly which phones were affected in the production process, and if you own one of those devices, Apple will contact you, rather than the other way around. It isn’t clear when or how this will happen, though.

How much battery life should you be getting anyway? Here are the stats from Apple’s site:

  • Talk time: Up to 10 hours on 3G
  • Standby time: Up to 250 hours
  • Internet use: Up to 8 hours on 3G, up to 10 hours on LTE, up to 10 hours on Wi-Fi
  • Video playback: Up to 10 hours
  • Audio playback: Up to 40 hours

Of course, these are numbers for the best case scenario, so I wouldn’t expect real-world usage to turn in results quite so high. Anecdotally, I’m usually able to make it through a full day of medium usage with my brightness set to auto. If you find yourself falling somewhat shy of that, check out these tips to improve your phone’s battery life.