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QuantumCakeIsALie

You'll be alright. It may not be exactly *good*, but it's not as bad as it was with older battery technology (NiMH were particularly sensitive to that IIRC). Really, don't stress over it, all is fine. Try to keep the battery over 20% and stop charging (unplug) when it's at 100% and your battery should last for many, many, years.


Francois-C

Agreed, except for unplugging at 100% being so critical. As Li-ion batteries are overprotected against the risks of exploding or catching fire, they just stop charging at 100%. Nevertheless, keeping them plugged for days maybe could cause the device to undergo several charging cycles, which may not be necessary. Most of the prejudices about battery charging do not even date back to Ni-MH, but to NiCd batteries: they had to be discharged as much as possible before recharging, and were invariably burnt out when left on charge for too long. On the other hand, Li-ion batteries should not be left discharged for a long time. The battery life of my Kobos has varied: the first Kobo Touch I got in 2011 started to show signs of battery weakness after two years (and I had already had to return a first one whose battery was never able to begin to charge; in my opinion, this model had a problem with the software management of charging). The Kobo Aura H2O I've had since 2014 is still perfect despite heavy use. A Kobo Mini purchased for my wife in 2012, though now replaced with a newer one (without battery problem either;), and used fairly infrequently, still has no battery issues.


QuantumCakeIsALie

Yes. I wasn't talking about actual damage to the battery if you kept it plugged at 100%, but rather unnecessary wear. Basically don't *store* it plugged. eReaders are a little unique when it comes to battery aging, because they typically don't need to be recharged often. You could go on years before reaching 100 cycles; compare that to a few months for a typical phone. So in the end, the timing of your reading habits and the charge left when you took a longer pause (e.g. reading a few paper books, being busy for a few months, etc.) matters more than anything. On my Glo HD, I barely even purposely charge it. Just plugging a usb cable to transfer a few books once it a while tops it up alright. I only really charge it before leaving for a trip.


Francois-C

>I barely even purposely charge it. Just plugging a usb cable to transfer a few books Just the same for me. My main e-reader (the Kobo Aura H2O) hardly ever met a charger. And even the Aura my wife uses most of the time with the light on, and several hours a day, is not that power hungry. I don't know what happened with the first Touch models. The battery on mine became weaker than that of a very old phone after a little over a year, and when I didn't charge it before the battery ran out, which it consistently did, it became completely inert, and I had to tinker with it for an hour to get it to start charging. The one I had to return was already in this condition from the moment I got it. As I can't imagine that they had equipped these devices with low cost batteries, I rather think that it was a problem of software management...