Oasis Separate Charging Cover

[HarryT]

Originally Posted by webjunk

Given the length of time a battery will last, likely to outlast the device, that it being able to be replaced is somewhat moot, IMO, and should have no bearing on whether you buy any device. All batteries die eventually.

Certainly. I was simply answering your question of why anyone would want to replace a battery. Many people want to (and do) keep devices long enough for the battery to die (which typically happens after 5 years or so), hence the existence of third-party battery replacements.

[jbjb]

Originally Posted by howyoudoin

. Three partial charges of 33%, for instance, together make up one single 100% cycle. Charge cycles are going to be used up, no matter what the distribution.

That's not correct. Three partial charges at 33% will reduce the life of the battery by significantly less than one 100% cycle.

Given that the way the Oasis will be used in many instances (with frequent top-up charges from the case) means that the absolute capacity of the device battery isn't crucial (the overall capacity will be dominated by the case battery), the designers could well have chosen not to charge the device battery to full capacity, thereby further extending the lifetime.

While it's perfectly valid to consider whether there might possibly be a reduced battery lifetime on the Oasis, it's by no means certain that that will be the case. Claiming it so assertively, and insisting that people of differing opinions "stay out and let those who know what they're talking about talk" is unhelpful.

[Barbara1955]

Originally Posted by disconnected

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

I was hesitant about ordering it because I haven't had great luck with Kindle screens but this one is very good, the best I've seen. I've also always had a problem with the limited font sizes on my Kindles. I always wanted something between the fourth and fifth sizes. The Oasis screen is so good that I'm fine with the fourth size.

I've always wondered how people managed to hold on to their ereaders without covers. I'm a weakling and a klutz -- ereaders just seem to want to fly out of my hands. The Oasis is so light and well-balanced that I'm actually able to hold it in one hand without the cover. People have mentioned being bothered by the asymmetry of it but in person it seems like a logical way for it to be.

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

Have you tried reading with cover on? & then keep track of the Battery Life? Or does reading with the cover on take away the comfort of holding it?

[howyoudoin]

Originally Posted by jbjb

That's not correct. Three partial charges at 33% will reduce the life of the battery by significantly less than one 100% cycle.

Given that the way the Oasis will be used in many instances (with frequent top-up charges from the case) means that the absolute capacity of the device battery isn't crucial (the overall capacity will be dominated by the case battery), the designers could well have chosen not to charge the device battery to full capacity, thereby further extending the lifetime.

While it's perfectly valid to consider whether there might possibly be a reduced battery lifetime on the Oasis, it's by no means certain that that will be the case. Claiming it so assertively, and insisting that people of differing opinions "stay out and let those who know what they're talking about talk" is unhelpful.

I don't ask people with differing opinions to "stay out.....". That is an absolute misrepresentation of my intention. People will have differing opinions and that's okay. But I draw the line at people making assertions that are glaringly illogical, and dismissing those that seek to further the discussion on the basis of informed dialogue rather than irrelevant experiences. I asked the poster to stay out because he tried to create an equivalence between his experience with a 1350mah battery on the K1 and the 250 mah battery on the Oasis main device and he explicitly stated that he was dismissive of those who didnt share his optimism.

[Strether]

Originally Posted by Katie1

Have you tried reading with cover on? & then keep track of the Battery Life? Or does reading with the cover on take away the comfort of holding it?

I read with the cover on because it's more comfortable for my hands that way. And I'm getting about 26 hours of reading per charge--about the same as the Voyage.

Jim

[webjunk]

Originally Posted by howyoudoin

I don't ask people with differing opinions to "stay out.....". That is an absolute misrepresentation of my intention. People will have differing opinions and that's okay. But I draw the line at people making assertions that are glaringly illogical, and dismissing those that seek to further the discussion on the basis of informed dialogue rather than irrelevant experiences. I asked the poster to stay out because he tried to create an equivalence between his experience with a 1350mah battery on the K1 and the 250 mah battery on the Oasis main device and he explicitly stated that he was dismissive of those who didnt share his optimism.

Your battery assertions were glaringly illogical, and incorrect, as they ignored the relevancy of the fact. That others may make comparisons that are not comparing apples with apples is not glaringly illogical but merely comparing apples with oranges. Strangely, that latter conclusion was far more accurate than the former. Such is life.

[John F]

Originally Posted by webjunk

It's certainly a fact but is it a relevant one? Let's introduce another fact. Batteries DO NOT just die. Their ability to hold a full charge slowly diminishes.
Let's use 500 charge cycles although it is likely to be greatly in excess of that.

Relevant fact A. 6 hours. 500 charge cycles. 3,000 hours, at 30 mins per day, 6,000 days. It's over16 YEARS!!!

Relevant fact B. If you read for 6 hours a day (greatly exceeding the design parameters and claims (non-Amazon) for the device) then you get 500 days. Should the battery ONLY give you 500 charge cycles, the battery will begin to dimish slowly over another 500 charge cycles.

So for A, let's say you'll get 10,000 days and then the battery ceases to hold a meningful charge. Well, who cares. It's a very long time.

So for B, you've still had exactly the same reading time out of the battery if you call its life two years. Therefore, if you read 6 hours a day every day then maybe you may, and I emphasise may, wish to consider a different device if you realistically consider your reading timeis that significant.

So there are facts. When these facts are applied to the Real World(tm) are they relevant. Application of relevancy will give you a rational answer and prevent pontless outrage.

...

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.

[Shinytop]

@howyoudoing: As a matter of fact you posted that those who think different from you may not believe in proved scientific fact such as vaccines or evolution. Putting other posters down is not a recipe to get them to listen to your posts.

[howyoudoin]

Originally Posted by webjunk

Your battery assertions were glaringly illogical, and incorrect, as they ignored the relevancy of the fact. That others may make comparisons that are not comparing apples with apples is not glaringly illogical but merely comparing apples with oranges. Strangely, that latter conclusion was far more accurate than the former. Such is life.

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.

[howyoudoin]

Originally Posted by Shinytop

@howyoudoing: As a matter of fact you posted that those who think different from you may not believe in proved scientific fact such as vaccines or evolution. Putting other posters down is not a recipe to get them to listen to your posts.

Remind me who accused whom of being a troll?

Once again, I did not put down people who hold different opinions. I put down people who make illogical comparisons like comparing a 1350 mah battery to a 250 mah battery.

[Barbara1955]

Originally Posted by Strether

I read with the cover on because it's more comfortable for my hands that way. And I'm getting about 26 hours of reading per charge--about the same as the Voyage.

Jim

Strange that is also what I get with the PW3 ...light at 18

[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.

[Blossom]

Originally Posted by howyoudoin

I don't ask people with differing opinions to "stay out.....". That is an absolute misrepresentation of my intention. People will have differing opinions and that's okay. But I draw the line at people making assertions that are glaringly illogical, and dismissing those that seek to further the discussion on the basis of informed dialogue rather than irrelevant experiences. I asked the poster to stay out because he tried to create an equivalence between his experience with a 1350mah battery on the K1 and the 250 mah battery on the Oasis main device and he explicitly stated that he was dismissive of those who didnt share his optimism.

He is a she. Everyone has a right to post their experiences or opinions. No one has a right but the Mod Team to ask someone to refrain from posting. Please remember that.

Sent from my Nexus 7 using Tapatalk

[Atunah]

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.

That is really interesting. That you did all this testing with and without light. I know once I get ready to read outside, like on the balcony, I tend to turn my lights off. I can't tell the difference between 2 or 11 or 18 when I am in outside daylight on a sunny day. Not talking about actual sun on me, just bright daylight.

Now I assume you had wifi off for this testing stuff? I always wonder if the amount of books in the cloud and the amount of collections someone has, also affects battery life. I have like over 40 collections. . Lots of books in those collections, often in more than one. I used to bring my PW1 to a total grind just trying to put something in another collection after I read it. It took minutes. Voyage and Oasis are much faster on that thankfully.

[disconnected]

Originally Posted by Katie1

Have you tried reading with cover on? & then keep track of the Battery Life? Or does reading with the cover on take away the comfort of holding it?

I did one test where I read some of the time with the cover on and some with it off. I kept it in the cover when I wasn't reading so it would keep recharging from the cover. I got about twenty-four hours of reading time before I started getting low battery warnings. I'm happy enough with that.

All the testing I did was with wifi off and the light at 17. That matches my real-life use. My eyes seem to require a lot of light for reading and I sideload everything from Calibre and never use wifi.

The Oasis with the cover on is pretty light but still not quite light enough for me to hold in one hand for very long. With the cover on I tend to hold it like my other ereaders, kind of balanced against a pillow or chair arm or something for extra support.