Built into the OS is different than an app. But anyways...
No! Not 'But anyways...' Don't try and brush it under the carpet. Do you really think that taking an idea that's already there and putting it in the OS instead of an app is somehow worthy of a patent? Really?
But anyway, there are probably are no prior patents for this,
because it should never have been patented in the first place, as so well put by zeeklancer.
Apple are basically patenting 'IF x THEN y' - 'IF too far from recharge point THEN use less power'.
Can you not see that this is not worthy of a patent? It's simply using available information to make a decision. That's basically how everything in any computer works!
Using that logic I'm going to patent 'IF bright outside THEN turn up backlight', and 'IF on button pressed THEN switch on', and 'IF 07.00 and alarm set for 07.00 THEN sound alarm', and 'IF 07.01 and alarm set for 07.01 THEN sound alarm', and 'IF 07.02 and alarm set for 07.02 THEN sound alarm', and so on....
This is a dick move, exploiting the patent system in a way that it was simply not intended to be used.
As I wrote in a previous post:
Apple is not alone in this. It is an endemic problem. But people need to realise that Apple is a huge company, and it does a lot of things - some great, some good, some bad. This is bad.
We need to be adults and realise that just because we like Apple as a whole and the great stuff it does, we don't have to defend everything it does.
We can hate the bad stuff Apple does and still be an Apple supporter.
In fact, if you truly want Apple to continue to improve as a company, that's exactly what you should do.