Karlis Dambrans/Flickr (CC) Is your iPhone battery draining superfast or switching off early? Well, you're not alone.

Two serious problems are destroying iPhone battery life.

First, a problem with some batteries in the iPhone 6s is making them switch off despite supposedly having plenty of battery left.

And a bug in a recent iOS 10 update is also making iPhone batteries empty much faster than normal.

Apple has actually acknowledged the problem with iPhone 6s batteries. The company claims it affects only handsets sold from September 2015 to October 2015 (when the device first launched) and is offering free battery replacements to people who bought iPhones in that time frame. Affected users are seeing their phone switch off at random, even when the battery meter indicates plenty of charge.

It's unclear exactly how many people are affected — Apple says it's only a "very small number," though anecdotally it seems to be relatively widespread.

A Chinese government watchdog isn't happy with Apple's response on the issue so far. It claims the issue is also affecting the iPhone 6, the iPhone 6 Plus, and the iPhone 6s Plus, Quartz reports, despite Apple's assertions to the contrary.

An Apple representative could not immediately provide Business Insider with clarification on these claims — and it's unclear whether they relate to the second battery problem that is afflicting iPhone owners.

Apple CEO Tim Cook. Chip Somodevilla/Getty Images After updating to iOS 10.1.1 in October, many users are reporting that their batteries are draining unnaturally quickly and switching off when their phone says it still has about 30% of its charge left.

As an apparent software bug, this should be fixable with a future software update — but for now it's immensely frustrating for some iPhone users. Some users have turned to external battery packs to keep their phones charged.

(Apple also did not comment on when a potential fix might arrive.)

The iPhone 6s bug is more troubling, as it necessitates a hardware fix. Apple gives instructions on how you can check its website to see whether you're affected and how to return your phone if so.

Either of these problems would be a real pain. Combined, they're a major headache for users — and Apple.