Oasis Separate Charging Cover

[odamizu]

Originally Posted by disconnected

I'm surprised at how much I like it. Its pictures don't do it justice.

I agree. I don't think one can fully understand the appeal of the Oasis until you hold one in your hands. There's no other way to fully grasp the ergonomics. When I saw photos, I was like, "Not symmetrical? What's with the wedge? Half the battery's in the cover? Really, Amazon?" But reading the ergonomic reasons for the unusual design, caught my attention. Seeing videos of people holding and using the Oasis got me ordering one. But it wasn't until I held one that I had the "aha, now I get it" moment. That said, I fully recognize that the ergonomics probably appeal only to a niche market.

I think I've spent about enough time obsessing about the batteries.

Btw, my rant was not directed at you. I knew from your other posts that you were an Oasis owner trying to figure out if your cover was working properly.

[jbjb]

Originally Posted by NullNix

FWIW, assuming the thing is not indexing and wifi is off, I've found a massive dependence of internal battery life on lighting level, far more so than on my old PW1. With the light at 10--12, the internal battery drains in about four hours: with it at zero (which on the Oasis actually *is* zero), it lasts astonishingly long, draining by about 5% an hour, i.e. being pessimistic, maybe fifteen-plus hours from the internal battery alone, which would give something like 50--60 in the cover (!!!).

That's a really interesting find - nice work!

I suspect that the power consumption of the other components of the Oasis, including the screen, has been driven down so far that the loads of lights are now a huge proportion of the total power draw.

That sounds definitely plausible - I suspect you may well be right.

[webjunk]

Originally Posted by John F

For me, I'm not interested in "real world", I'm interested in how the device is going to work in conditions I use it in. I prefer to "plug in" my device less often, so to me, your facts look like they have some discrepancies, compared with this page (I'm looking at your 6 hour use scenario):

http://www.batteryuniversity.com/lea...ased_batteries

Since capacity diminishes starting with the first charge, if you are recharging more often because of a smaller battery, the capacity is going to decrease faster, so you are going to have to continuously charge more frequently, ... ?

IMO.

And I laugh at your "real world" case being 30 minutes a day.

It's simply an illustration. Of course it's not accurate but it's represents a realistic assessment of battery life applying relevancy of facts rather than irrelevant speculation.

Sorry, people read on average 30 minutes a day (or 20 mins or 43 mins depending where you look) You may not, but then do you read 6 hours a day...

Anyone should be able to work out a rough rock bottom battery life expectation from it. Even doing that there is nothing to be concerned about.

By the way, did you look at best charging percentages - your wanting to run the battery right down and then charging it up to 100% again, because it's your personal preference for your own reasons, is the worst way to treat a battery.

[webjunk]

Originally Posted by howyoudoin

Logic involves making relevant comparisons. Comparing apples with oranges is not a relevant comparison, especially if said comparison is supposed to yield usable information. You cannot harp on relevancy when it comes to posts you disagree with whilst excusing the lack of it in elsewhere. Perhaps it's just human nature that drives this inconsistency.

You can call my battery assertions incomplete or irrelevant or even incorrect, but illogical they were certainly not.

Only if you can explain why your battery assertions were logical rather than a logically incorrect (comparing apples with oranges) extrapolation of a misunderstanding.

[webjunk]

Originally Posted by NullNix

FWIW, assuming the thing is not indexing and wifi is off, I've found a massive dependence of internal battery life on lighting level, far more so than on my old PW1. With the light at 10--12, the internal battery drains in about four hours: with it at zero (which on the Oasis actually *is* zero), it lasts astonishingly long, draining by about 5% an hour, i.e. being pessimistic, maybe fifteen-plus hours from the internal battery alone, which would give something like 50--60 in the cover (!!!).

I'm amazed by these figures, but I just read for about twelve hours spread across two days without sticking it in the cover and with the light and wifi off, and the internal battery (measured by briefly chucking it into the cover so I get percentage figures) is still at 30%! I've done a couple of total discharges now, and lots of partial discharges, so the charging circuit should have a good idea what the discharge curve looks like, and these figures should be fairly accurate: even if they're not, twelve hours is a hell of a lot longer than the 4--6 I get with the light at 10. I read fast and have probably read at least 1300 pages in that time (I was reading periodicals, so it's hard to tell). I suspect that the power consumption of the other components of the Oasis, including the screen, has been driven down so far that the loads of lights are now a huge proportion of the total power draw.

Of course, with the lights off the screen is not a pretty white and you might need an external light, just like actual paper -- but if you're away from external recharging, this might be a thing worth knowing.

There are now a lot more leds to power (50% more)

[Dr. Drib]

Originally Posted by disconnected

Wow, that is a blast from the past. I guess I hadn't looked at my profile in quite a while.

I know what you mean.

[HarryT]

Originally Posted by webjunk

There are now a lot more leds to power (50% more)

But each one is only producing half as much light. The Oasis screen isn't any brighter than that of the PW3 or Voyage. The reason for doubling the number of LEDs was to give more even illumination, not to produce more light.

[John F]

Originally Posted by webjunk

...

Sorry, people read on average 30 minutes a day (or 20 mins or 43 mins depending where you look) You may not, but then do you read 6 hours a day...

Again, I'm interested in the larger numbers, as that is similar to my habits. Your "averages" don't really interest me. I think the math doesn't work to favorably for the heavy reader who doesn't like to charge as often.

... Anyone should be able to work out a rough rock bottom battery life expectation from it. Even doing that there is nothing to be concerned about. ...

Would you please help a fellow member with poor math skills? What is a rough rock bottom battery life expectancy (for the smaller battery of the Oasis) using it for six hours of reading a day without the cover.

... By the way, did you look at best charging percentages - your wanting to run the battery right down and then charging it up to 100% again, because it's your personal preference for your own reasons, is the worst way to treat a battery.

Who says people are running "the battery right down?"
That is the point you refuse to grasp: with a larger battery, who cares? You can go for long periods between charges, and still not abuse the battery.

The Oasis is going to be a great device for some people; for some it won't. Why not just present the numbers so people can make up their own mind?

[Atunah]

I don't know how one can know yet how long the battery will last in the Oasis before it won't hold a good charge anymore. At least not until at least a year out I would think? Once they are past the warranty. While in it, there shouldn't be any worry as they will replace it.

As someone that is a heavy reader, daily for hours, I am not at all concerned. I base this on the track record with the other kindle devices I have had over the years and also with the great customer service they usually provide.

Anyone is free to worry about such things though, I don't. I'll just use my Oasis every day. If I have any issues, I'll ring up kindle support. I don't expect any issue, but one never knows.

I am totally bad at math and I admit I never can understand all this stuff I am suppose to do with batteries, or not suppose to do. I used to be a bit more obsessed with batteries for that reason. Reading all these things. But now that I have many different devices with batteries, I am only 2 years in with a smartphone, I stopped worrying about it to much. I think the only thing that I do kind of try to follow is not running batteries all the way down. Although my tablets now keep running down all the time as I don't use them often and I keep forgetting to charge them. My nexus especially as it just shuts down and I have to do some fancy button work to get it into boot thingie or some such thing.

So by using the Oasis as its been pretty much designed, topping the device off here and there so it never really runs out, that actually is a good way of using it then I gather. Mine has never gone down all the way and it stays pretty much above 40-60% all the time.

[badgoodDeb]

And John F, in case your math is really bad (you didn't say), the Oasis without the cover is only advertised to have 7 reading hours of charge. (14 days at 30 minutes per day). So you will have to charge it at that point, regardless.

[John F]

Originally Posted by badgoodDeb

And John F, in case your math is really bad (you didn't say), the Oasis without the cover is only advertised to have 7 reading hours of charge. (14 days at 30 minutes per day). So you will have to charge it at that point, regardless.

I would say I'm very good at math, but my current knowledge is very poor; I've forgotten just about everything I've learned.

FWIW.

[Cinisajoy]

Originally Posted by John F

I would say I'm very good at math, but my current knowledge is very poor; I've forgotten just about everything I've learned.

FWIW.

John,
With your hours of reading a day: the OASIS will need fed pretty much every day.

[shalym]

Originally Posted by Cinisajoy

John,
With your hours of reading a day: the OASIS will need fed pretty much every day.

Yes...but it will need to be "fed" by putting it into the case, not plugging it in to a power block.

I believe that this is how Atunah uses the device, and I think she said she get 5 days before she needs to recharge the device/cover by plugging it in.

Shari

[Atunah]

Originally Posted by shalym

Yes...but it will need to be "fed" by putting it into the case, not plugging it in to a power block.

I believe that this is how Atunah uses the device, and I think she said she get 5 days before she needs to recharge the device/cover by plugging it in.

Shari

Yes, exactly. So it doesn't feel like charging as all I do is put it in the cover quickly here and there. Even just 10 minutes in it top the battery off nicely.
I don't even think about it anymore. Once in a while I check the level of cover to make sure I don't run out for the evening session. I don't pay attention much to the battery on the device, only what the cover has.

[NullNix]

Originally Posted by Atunah

Yes, exactly. So it doesn't feel like charging as all I do is put it in the cover quickly here and there. Even just 10 minutes in it top the battery off nicely.

Quite. Even more than those people who have mobile battery pack chargers, you're not tied to anything. It's kind of like the opposite of those smart watches that you have to nail to the wall for recharging every day. (The caveat, of course, is that the design encourages you to take it out of the case, which means you'll probably lose the case sooner or later, and then I don't see any real way to get a replacement other than a warranty claim! This seems less than ideal.)