Quote:
Originally Posted by barryem
Since the battery is 1/6th the size of the Voyage battery, and since the device always runs off the internal batter even if the cover is charging it, and since batteries typically last between 500 and 1000 charges, it's reasonble to guess that the Oasis battery will last 1/6th as long as the Voyage battery.
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Actually Barry this is one of those myths that a lot of people don't quite understand how the battery life cycle works. Most Lithium-Ion batteries are quoted as lasting 400 charge cycles not 1000 charges. A charge cycle is defined as charging the battery from 0% to 100% then discharging it back to 0%. After that 400 or so charges then you'll expect only about 80% capacity of the original battery, losing 20%, ultimately not lasting as long as it previously did. Every Lithium-ion battery has these whether it's a Kindle battery or an iPhone or Laptop battery.
Charging under regular use (topping up) does not count as a charge cycle or even a significant part of a charge cycle.
So the amount of times you'll be doing a full charge and discharge is pretty seldom, then you shouldn't see much of a different in battery longevity over time with the Oasis compared to the Voyage unless you are performing full charge and discharges, which the Oasis won't be doing because as soon as the internal battery drops to 80% the battery case tops it back up again.
I've never had a Kindle battery get to the point where I've noticed the battery is degrading. The only time I have noticed this is on some 5-6 year old laptops and a 5 year old iPhone where you can clearly see over years of charging and misuse that the battery has degraded enough to be noticeable. Also these devices tend to get a lot more charging done throughout a single day then any Kindle would do.
Are we going to notice a difference in the battery holding a charge in 2, 3 or 4 years? I very much doubt it. If people keep their Oasis like some keep their original Kindle or DX or Kindle Keyboard for 10-15 years, so say in 2025 or 2030 if people are still running them, then yes it's quite possible they will see battery issues but likewise they would on a Voyage too.
Me, I tend to keep / use the device for a couple of years before upgrading to the next model, sometimes it's sooner if a newer better model comes out, or sometimes longer at 3 years, so for me I won't see that as an issue for the Oasis.
You're are partially right though, if you are topping the Oasis up a lot more than you would a Voyage then yes there will be a slight difference in battery longevity but I really don't believe it will be 1/6th as long as the Voyage, probably more like 5/6th if you really wanted me to pick a figure out of the sky.
Lithium-ion actually prefers to be trickle charged than have full charges carried out, it actually maintains the battery life longer over time, take every smartphone or laptop for that matter. Keep the phone charged up and it lasts years. Keep a laptop plugged in and it lasts for years. The only time it stops lasting is if you keep taking it off of charge and depleting the battery fully and having to keep recharging it.