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Old 04-03-2009, 06:15 PM   #1
valkyriesound
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Question Battery holding charge?

How long does your DR hold a charge if you don't use it?

Charge it up.. turn it off and let it sit for a couple of days...
Do you still have power in the battery?

I don't....

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Old 04-03-2009, 06:44 PM   #2
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Sometimes you do, sometimes you don't.

Sometimes, I get a really long charge - after several days, charge is still at 60%. Sometimes, the next morning device is already dead.

I suspect two things. First, i think the battery meter isn't reliable yet. Second, I think the device wakes up from time to time, but fails to go back to sleep/off.
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Old 04-03-2009, 08:32 PM   #3
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To clarify: You mean you completely turn off the device, correct? I've also noticed that the battery sometimes drains itself even when the device is completely shut down. I suspect that the device does not always shutdown completely (even if the screen goes white), and the processor or something else keeps running. This happens pretty rarely though.
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Old 04-04-2009, 02:14 PM   #4
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Well the battery & processor can never truly shutdown, otherwise it wouldn't wake up since the buttons are capacitive.
I must admit I've never been able to leave mine long enough to determine the quiescent discharge rate though. I keep using it. However, when I go away on vacation later, I will find out as I'll take the Cybook rather than the DR. So I'll charge the DR before hand & see after 5 days or 2 weeks whether it has lasted the course. In the meantime, it would be interesting to see other peoples experiences.
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Old 04-05-2009, 02:13 AM   #5
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I'd love to know what you all are getting...

It seems if I leave it for 48 hours it has no charge when I come back...
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Old 04-05-2009, 04:39 PM   #6
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Several days without losing almost any charge (but that happens seldom since I tend to still use it regularly).

Even though I haven't had a problem since the 1.5 update, I still double-check if it's properly shut down (i.e. no top LED flashing, no reaction of the buttons)
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Old 04-05-2009, 07:44 PM   #7
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Several days without losing almost any charge here, too.

I can't remember when I last started up my DR - maybe early-mid last week. Today, Monday, its still showing as full battery (its been switched on for an hour).

I check its fully shut-down each time I switch it off, too, with a press on a (non-menu) button to check it is not responsive.
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Old 04-06-2009, 04:09 AM   #8
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I have just turned my machine on and it is showing two bars.

I charged it a week ago and then used it for note taking on Tuesday during a three hour meeting. I used it briefly Wednesday and then left it alone for over four days until I turned it on this morning.

In use for taking notes it only lasts about a day but turned off it keeps the charge for several days at least.
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Old 04-06-2009, 08:57 AM   #9
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[QUOTE=cbell;419648]Several days without losing almost any charge here, too.

I can't remember when I last started up my DR - maybe early-mid last week. Today, Monday, its still showing as full battery (its been switched on for an hour).

[QUOTE]

Exactly the same with my device.
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Old 04-06-2009, 12:52 PM   #10
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I didn't use it all weekend. I recall the battery gauge read something in the 60s on Friday, it reads 64% now.
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Old 04-06-2009, 04:06 PM   #11
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Quote:
Originally Posted by Grimulkan View Post
To clarify: You mean you completely turn off the device, correct? I've also noticed that the battery sometimes drains itself even when the device is completely shut down. I suspect that the device does not always shutdown completely (even if the screen goes white), and the processor or something else keeps running. This happens pretty rarely though.
Yes, this is a known issue. They made some fixes in the 1.5 firmware to address this, but I don't think they completely solved the problem. I believe they are still working on it.

I think the current theory is that some of the documents don't close completely for whatever reason, and the device looks like it shutdown, but is really still running (basically the open documents get hung). Some people have said that making sure you close all of your documents first, and even removing the SD card, will make the shutdown much more reliable.
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Old 04-07-2009, 01:05 AM   #12
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i haven't used the device for several days , except minutes. it didn't go much down , 5% each day , but losing all charge on two days , there is definitely a charge leak somewhere i guess
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Old 08-06-2009, 04:10 PM   #13
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My DR is 6 days old. Last night, when I finished reading and shut it down, there was 53% battery left. Tonight, when I tried to turn it on, the DR was dead. Thanks I have been in this forum for months and I have seen the similar problems. So I was NOT surprised, NOT worried I just peacefully connected it to the computer and charged it for about 20 minutes. Now it is alive again. Very interesting experience. I feel I like a white mouse for some experiment. I think it is necessary to buy a battery charger now. O!!! My money...
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Old 08-06-2009, 08:50 PM   #14
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yingwu, it's good that you didn't panic, but just calmly put your DR on charge. A charge can solve so many problems, not just with DRs, but all e-Ink devices

As you'd know, the battery indicator icon isn't fully reliable for the first few charges.

There's advice for managing battery charging at
http://www.irextechnologies.com/batteries

While this document is written for iLiads, I expect it's also applicable for DRs (just ignore the parts about stylus, wifi, usb stick)...
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Old 08-07-2009, 05:57 AM   #15
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Quote:
Originally Posted by cbell View Post
yingwu, it's good that you didn't panic, but just calmly put your DR on charge. A charge can solve so many problems, not just with DRs, but all e-Ink devices

As you'd know, the battery indicator icon isn't fully reliable for the first few charges.

There's advice for managing battery charging at
http://www.irextechnologies.com/batteries

While this document is written for iLiads, I expect it's also applicable for DRs (just ignore the parts about stylus, wifi, usb stick)...
I see. Five charging-cycles...
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