Quote:
Originally Posted by HarryT
No, leaving WiFi on definitely doesn't triple the power consumption! It obviously does increase it somewhat - my guess would be by something like 25%. What it does do, however, is drastically increase the power drain if you leave the Kindle asleep for a long period of time (days, that is) because it'll wake up every so often and have a nice chat with Amazon's servers. It doesn't do that in aeroplane mode. With WiFi off, my Kindle's battery charge doesn't change from one day to the next while it's asleep. If I switch on WiFi, it'll typically drain by maybe 5% overnight. I've got the WiFi+4G version of the Oasis which uses more power for its wireless comms (because it's powering the 4G module, too) than the WiFi-only version does.
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Oh, sorry, by talking about WiFi on I meant Airplane mode off, and my KO2 is WIFI + 4G too. Before I did have a pure WIFI one and can confirm the observation about its' slower discharging
I'm not sure regarding 25% increase of power consumption, my impression is different, but I didn't profile this part. However, 5% overnight discharge seem to me rather to match my triple-estimation: my overnight discharge in Airplane mode is about 1-2%. It's rather non-reliable recall, but I believe my KO2 barely could run on a single charge for a day with wireless on versus about two days offline(I had a short vacation then and was spending almost a whole day reading). Still, I do not insist on my impression, need to profile this aspect