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Is it ok to use the Fire while it's plugged in?


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Showing 1-20 of 20 posts in this discussion
Initial post: Dec 22, 2011 10:41:15 PM PST
HN says:
Right now it has a full charge and keeping it plugged in keeps it that way.

In reply to an earlier post on Dec 22, 2011 10:53:07 PM PST
Yes, you can use it while it is plugged in.

Posted on Dec 22, 2011 10:59:41 PM PST
Debbie says:
It's okay to use it while plugged in. However, your battery will usually last longer over time if you don't leave it always plugged in. A general recommendation for lithium batteries is to discharge the battery all the way at least once per month and then charge it again.

Posted on Dec 22, 2011 11:14:11 PM PST
Leumas says:
I understand the Li Ion batteries need a once per month full discharge and recharge.

However, I was told that they also have a limited number of cycles of charge discharge.

So is it better to keep the KF plugged in when you can and only discharge fully and charge as little as you can (but at least one once a month) so as to minimize on the number of cycles per month and thus prolong the life to more years?

In reply to an earlier post on Dec 22, 2011 11:45:40 PM PST
Last edited by the author on Dec 22, 2011 11:47:06 PM PST
Dragi Raos says:
"I understand the Li Ion batteries need a once per month full discharge and recharge.

However, I was told that they also have a limited number of cycles of charge discharge."

I don't think that full power reserve cycling requirement, if it exist at all, is nearly as important as it used to be in ancient NiCd batteries. Most recommendations I saw say "discharge to approx 30%, then charge fully". (This "fully" is actually very tricky, as the batteries require first constant current charging until they reach a certain voltage, then keeping that voltage until charging current drops to a certain low level, then stop; I hope that Kindle's internal charger circuity takes care of this properly.)

While the batteries have a life expectancy in terms of charging cycles, it should be in thousands, which translates to decades if not centuries for a device as thrifty as Kindle*. However, I do tend to keep it plugged in while doing power-intensive operations like indexing.

Also keep in mind that USB/power cord that comes with Kindles is notorious for its physical fragility (disintegrating connectors are rather common) - it does not like banding at ends.

Edit: *) I realized that the question was about Fire - not so thrifty. 30% - 100% cycling is probably the best.

Posted on Dec 22, 2011 11:56:45 PM PST
HN says:
Lithium-ion does not need to be fully charged; a partial charge is better. I just top it off everyday.

In reply to an earlier post on Dec 23, 2011 12:22:43 AM PST
Sue says:
I do the same because I am using the Fire most of the time during the day.

In reply to an earlier post on Dec 23, 2011 12:44:06 AM PST
Last edited by the author on Dec 23, 2011 12:45:55 AM PST
From an online article regarding these types of batteries: "Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count. The smaller the depth of discharge, the longer the battery will last. If at all possible, avoid frequent full discharges and charge more often between uses."

See here: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

Fully discharging your Fire's battery is not recommended. I believe such advice was once valid a long time ago with the types of cell phone batteries that were commonly used, but not with more modern batteries.

Edit to also add that yes, it is safe to use your Fire while charging.

Posted on Dec 23, 2011 1:30:20 AM PST
SeaLevel274 says:
Good advice above about not fully discharging the battery. It might not, but a full discharge could cause problems with the electronics and I've had it happen on a laptop. My advice would be to try and avoid letting it get much below a 15% charge when possible.

Posted on Dec 23, 2011 8:18:35 AM PST
Last edited by the author on Dec 23, 2011 8:19:44 AM PST
Mike says:
The recommendation to fully discharge your battery is a carry over from the old ni-cad batteries. It is not recommended to fully discharge today's Li-Ion batteries as it will shorten its useful life and will require replacement sooner.

Some companies like Apple recommend fully discharging then fully charge the battery, however, this is to recalibrate the icon which show how much charge is left in the battery while shorting the battery's useful life.

Bryan, excellent web link, I am saving it for my records.

Posted on Dec 23, 2011 8:24:48 AM PST
Mike says:
PS
To answer your question if it is ok for leave it plugged in while using it;

IMO yes.
I believe the power from the charger will also be use to power the Fire and not from the battery, thus reducing the number of charge cycles of the battery, thus, increasing the battery's useful life.

Posted on Dec 23, 2011 8:31:08 AM PST
Quick tip: to use Fire in portrait mode while charging, flip it upside down so the cord comes out the top. Most (but not all) functions work perfectly well inverted and this avoids kinking the cord.

Posted on Dec 23, 2011 8:35:52 AM PST
Colin, I just got the touch and was pleased they put the plug on the bottom. I use platform covers and sometimes without thinking I'll close it, crimping the cord. But I will say having the power button on the bottom caused me to shut it off by accident. But that just takes getting use to.

In reply to an earlier post on Dec 23, 2011 5:42:49 PM PST
HN says:
Where would you want the button?

Posted on Dec 24, 2011 10:01:58 AM PST
Debbie says:
I'd rather the button was on top. Not a big deal though, as most apps will rotate so you can hold it "upside down". There are a few apps that don't rotate.

Posted on Dec 24, 2011 3:41:38 PM PST
Well go figure. When my Kindle two had it on top my cover folder over the top. Now that I have the touch and it's on the bottom my cover now folds over the bottom. LOL

In reply to an earlier post on Dec 24, 2011 5:32:23 PM PST
C. Scilley says:
I would just charge it and then unplug it to use it. You can use it while it is charging. It still charges pretty fast that way. But once it is charged, it will be better for your battery if you unplug it.
Carolyn

In reply to an earlier post on Jan 7, 2012 2:34:51 PM PST
This is proof positive that an authoritative (non amateur) rendering of the truth in an independent article is needed; like in a technical journal or web site. The bloggers here have asserted every possible variation of the "truth"

Posted on Jan 4, 2015 6:57:14 AM PST
C. Hall says:
Contrary to thinking that I would never play games on a screen smaller than my laptops,I mostly use my new Kindle Fire HDX 7 for games and fast web searches, or visiting Pinterest. I keep it plugged in while using, and in fact have never allowed it to fully discharge since getting it in August! I didn't realize that is what is recommended,but I will now start doing that monthly.

Posted on Jan 4, 2015 7:35:43 AM PST
nephew changed wi fi to use at his house I do not know password to change back to mine
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Discussion in:  Kindle forum
Participants:  15
Total posts:  20
Initial post:  Dec 22, 2011
Latest post:  Jan 4, 2015

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