If you have an iPhone 6 or 6s, there's a chance you've been plagued with random shutdowns. Apple has a replacement plan in place that gets you a new battery, but if you haven't gotten around to that yet, you'll be happy to hear that the newest version of iOS 10 seems to have fixed the problem.
Speaking to TechCrunch, Apple released this statement:
With iOS 10.2.1, Apple made improvements to reduce occurrences of unexpected shutdowns that a small number of users were experiencing with their iPhone. iOS 10.2.1 already has over 50% of active iOS devices upgraded and the diagnostic data we've received from upgraders shows that for this small percentage of users experiencing the issue, we're seeing a more than 80% reduction in iPhone 6s and over 70% reduction on iPhone 6 of devices unexpectedly shutting down.
We also added the ability for the phone to restart without needing to connect to power, if a user still encounters an unexpected shutdown. It is important to note that these unexpected shutdowns are not a safety issue, but we understand it can be an inconvenience and wanted to fix the issue as quickly as possible. If a customer has any issues with their device they can contact AppleCare.
It's good news, especially considering you can at least start your iPhone back up now, which was a major problem before. So, if you haven't updated to iOS 10.2.1, do so now by heading to Settings > General > Software Update. All that said, you should still get that battery replaced, because if nothing else it's still a free new battery.