Quote:
Originally Posted by JSWolf
I know someone who used to have a Kindle Touch but has switched to a PW3. So yes, I do have some experience.
The thing is, what I've been saying about the battery has nothing to do with this being a Kindle. It's just simple battery logic.
If you get say 500 charges from a battery before you start to lost capacity, then the battery in the Oasis will start to lose capacity sooner than a PW3 or Voyage because the battery in the Oasis holds less charge and needs to be charged more often using the batter in the case. So for every full charge you get with a PW3 or Voyage, the Oasis gets 2 charges. So that will bring the battery life of the Oasis to roughly half that of the PW3 or Voyage. This is something that most people do not think of. So basically, you are paying more for a device that has less of a shelf life due to the way the battery designed.
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Your 'simple battery logic' is too simple!
Your concern fails to take into account the fact that frequent shallow discharge/recharge cycles are much better for a Li Ion battery than less frequent deep ones. It seems reasonable to suppose that a typical usage pattern for the Oasis would involve it being returned to the cover relatively frequently, leading to shallower cycles and prolonging the life of the battery.
There's also the possibility that the designers of the Oasis could have exploited the dual battery design of the Oasis in ways to further prolong the life of the battery. For example, having the recharging cover readily available could be seen as reducing the need to push the capacity of the device battery to its maximum. Reducing the peak charge level of a LiIon cell dramatically extends its lifetime (e.g. dropping the charge voltage from 4.2V per cell to 4.1 V per cell will typically double the lifetime). I clearly don't know if the designers have actually made such a choice, but there's no reason to assume they haven't.
The claim that the Oasis battery will have a shorter lifetime than other Kindles is just conjecture - unless you have inside information about the design and typical usage patterns I'm not privy to, to present it as a fact is misleading.