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Old 01-03-2011, 10:20 AM   #1
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At what battery level do you charge your Nook?

I recall that with lithium ion batteries, it was optimal to charge when the battery reached ~40%. Is this also true of lithium polymer batteries (the type used in the Nook)?
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Old 01-03-2011, 05:38 PM   #2
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I was told to charge my battery when my Nook Color reaches 20% battery life left.
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Old 01-03-2011, 06:11 PM   #3
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I charge it when it shuts itself off or around 5%, whichever comes first. I come from the school that generally believes a battery lasts longer when you run it all the way down before charging it. Just MHO.
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Old 01-03-2011, 06:30 PM   #4
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I usually charge it when it's about 25% or less. If I am going to be going out and bringing my nook with me I will plan ahead and charge it a few hours before I plan on leaving the house. One time I forgot and went to B&N when I got the warning that my battery was low and the nook was shutting down.
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Old 01-03-2011, 06:44 PM   #5
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Originally Posted by astrangerhere View Post
I charge it when it shuts itself off or around 5%, whichever comes first. I come from the school that generally believes a battery lasts longer when you run it all the way down before charging it. Just MHO.
A little Googling says this:

"A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges."

http://batteryuniversity.com/learn/a...ased_batteries

(It also says that the "fuel gauge" on the device may become inreasingly inaccurate if you don't fully disharge the battery every 30 or so charge cycles, due to calibration issues.)
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Old 01-03-2011, 07:30 PM   #6
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Quote:
Originally Posted by taustin View Post
A little Googling says this:

"A lithium-ion battery provides 300-500 discharge/charge cycles.
This information is for a lithium ion battery, while the battery in the nook is a lithium polymer battery, which has different charging preferences. Lithium polymer can't be trickle charged, so short charge cycles are not recommended. I couldn't find any hard-and-fast rules about repeat full discharging, but I would imagine it's best to plug in between 5% and 40%, and avoid plugging in when the unit is more than 75% charged. Also, leaving the nook plugged in for long periods of time won't keep the battery charged, because the device shuts off charging at a certain point (it never truly reaches "100%"), so unplug it when it's finished charging and let it drain before plugging it back in.

Last edited by kezza; 01-03-2011 at 07:33 PM.
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Old 01-03-2011, 07:45 PM   #7
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So we shouldn't leave it plugged in..........or we risk a diminished battery life?


I've been leaving mine plugged in quite a bit.......perhaps not wise.......
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Old 01-03-2011, 07:50 PM   #8
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The age old debate with any and all gadgets.

This may help:

http://batteryuniversity.com/
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Old 01-03-2011, 07:54 PM   #9
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The Nook Color uses a Lithium-ion Polymer battery, and based on the likeness of the battery technology in the iPod, as well as no ill-effects mentioned from early charging in the NC user's guide, I have to believe you can charge this thing at any point in the discharge cycle.

They do ask that you refrain from fully discharging the battery.
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Old 01-03-2011, 08:03 PM   #10
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Originally Posted by The Joker View Post
So we shouldn't leave it plugged in..........or we risk a diminished battery life?


I've been leaving mine plugged in quite a bit.......perhaps not wise.......
I would guess that the folks that designed the battery/charger combination have taken this into account with protection circuitry, and you can rest assured that you're fine to leave it plugged in as long as you wish.
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Old 01-03-2011, 08:52 PM   #11
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This would probably be a good place to reiterate that B&N does not want you to shut your NC off while charging. Let it sleep while it charges.
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Old 01-04-2011, 01:30 PM   #12
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Quote:
Originally Posted by KryptoNyte View Post
This would probably be a good place to reiterate that B&N does not want you to shut your NC off while charging. Let it sleep while it charges.
I did not realize this. Any idea why?
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Old 01-04-2011, 02:39 PM   #13
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Quote:
Originally Posted by KryptoNyte View Post
This would probably be a good place to reiterate that B&N does not want you to shut your NC off while charging. Let it sleep while it charges.
I don't know why either, but I can tell you that you can't charge the Nook Classic while its turned off. If you have it off and plug it in for a charge, it turns itself on, and then goes to sleep.
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Old 01-04-2011, 02:40 PM   #14
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Originally Posted by KryptoNyte View Post
This would probably be a good place to reiterate that B&N does not want you to shut your NC off while charging. Let it sleep while it charges.
I don't care anymore if the screen is on or off when I plug it in, but I don't power the unit down. Not like it mattered because a rooted Nook is probably just going to spontaneously reboot itself randomly anyway, and in the process powering itself down several times. I just close my case so I don't have to be annoyed by this.

I charge whenever my battery widget turns red. I guess that's around 25% power left.
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Old 01-04-2011, 02:42 PM   #15
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...I just close my case so I don't have to be annoyed by this...
Too funny.
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