Apple is offering iPhone 6s customers a free battery replacement for devices that unexpectedly shut down. The problem mostly affects iPhone 6s units made between September 2015 and October 2015.

If you’re not sure when your iPhone 6s was made, you can use a new tool created by Apple to find out if your device has a faulty battery.

Here’s how to check:

Apple is offering to replace the batteries of faulty iPhone 6s handsets, produced between September and October 2015.

In a new page on its official website, Apple notes that it, “has determined that a very small number of iPhone 6s devices may unexpectedly shut down. This is not a safety issue and only affects devices within a limited serial number range.”

Buying a used iPhone 6s no longer requires meeting some shady dude off Craigslist in a Starbucks parking lot.

Apple is selling used iPhones on its online refurbished gear store for the first time ever, bringing big discounts to last year’s models.

Compare their specifications on paper and the Galaxy Note 7 looks like it would be leagues ahead of the iPhone 6s in performance, but real-world speed tests prove that the reality is very different.

Despite being almost a year older, Apple’s latest smartphone well and truly embarrasses the Galaxy Note 7 in app loading times.

This week brings deals that might not be right for everyone, but will be perfect for some. Students can score the cheapest iPad Pro 9.7″ we’ve seen, while AT&T customers can get two iPhone 6s’s for the price of one. These deals and more are in this week’s best Apple bargains.

We’ve got deals on a wide array of Apple products this week, whether you’re looking for a phone, laptop, streaming device or even just a fun freebie app. Read on to see the week’s best Apple bargains.

We know this year’s iPhone 7 refresh won’t be a big one, but just how similar will it be to the iPhone 6s? Find out in the video below which compares last year’s iPhone with the one we’re all expecting to see this September.

This year’s iPhone upgrade won’t bring a new design, a sharper OLED display, or wireless charging. It probably won’t bring any significant improvement in performance over the iPhone 6s, either, according to these early A10 processor benchmarks.

Facebook Messenger is now even more awesome on iPhone 6s.

Thanks to the app’s latest update, you can now take advantage of useful 3D Touch gestures that let you Peek and Pop into all your ongoing conversations — and into all the media shared within them.

Forget iMessage apps, the Siri SDK, QuickType AI suggestions and the Apple Music redesign.

There is one iOS 10 feature that I’m looking forward to more than any other: The ability to take pictures while listening to music.