Quote:
Originally Posted by knc1
Not to worry about your 'phone battery running down ...
Kindles normally only have 3 to 4 hours (depending on FW and model) of run time.
The BT controller requires a computer to run it, so the Kindle can never sleep.
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It may be the case for constant streaming (like listening audio-books) but Bluetooth keyboards should be also optimized for not sending data constantly to preserve their battery life. And Bluetooth LE controllers should handle it just fine. Probably using specific processor interrupts or something like that to awake it. In my understanding, when you do not hold a key on a keyboard, it doesn't send any radio waves into the air (maybe except some kind of a "ping" signal). And that is when the kindle's processor and a keyboard's micro-controller can save their energy. But when you do press a key then a Bluetooth controller on the kindle should awake the processor and it will handle the key. Though, I not completely sure whether it's true for PW4.