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#16 |
Wizard
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Karma: 730583
Join Date: Oct 2014
Location: Antwerp
Device: Kobo Aura H2O
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Anyway, it's definitely not common to empty more than a few percent per day though regular reading, but the precise scenario you described (i.e., down from 100-80 in a couple of days) is a bit of a special case on many devices.
Do you use a sleep cover? |
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#17 | |
Junior Member
![]() Posts: 5
Karma: 10
Join Date: Jun 2024
Device: Kobo Clara BW
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Quote:
There are conflicting threads here, some accusing Koreader of wasting battery while in sleep, which is another issue altogether. It could be just some hardware quirk sometimes when sleep fails to turn off something. I have Kobo Clara BW and I suspect Koreader does use more battery than Nickel... however, there is no going back to Nickel it's so bad UX-wise. Koreader is the only choice! |
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#18 |
Wizard
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Karma: 4236616
Join Date: Feb 2012
Location: Cape Canaveral
Device: Kindle Scribe
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#19 | |
Junior Member
![]() Posts: 5
Karma: 10
Join Date: Jun 2024
Device: Kobo Clara BW
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Quote:
![]() Setting was turned off by default, but the plugin was enabled by default. Anyone else wandering here years later, here is how to enable it: Go to Gear icon -> Device -> Autostandby timeout (set this value) If it's not visible you might need to go to: Wrench/Screwdriver icon -> Page 2 -> More tools -> Plugin management and make sure "Auto power save" plugin is enabled |
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#20 |
Member
![]() Posts: 13
Karma: 10
Join Date: Aug 2021
Device: Kobo Clara HD
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I'm at about 4% battery use while reading. No standby timeout. Full screen refresh every 3 pages.
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#21 |
Digital Grenadier
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Karma: 750000
Join Date: Jan 2024
Device: Kindle
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It would be interesting to see how much time of actual use you all get from one charge. I am getting about 10-12 hours on kindle
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#22 |
Member
![]() Posts: 13
Karma: 10
Join Date: Aug 2021
Device: Kobo Clara HD
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Reporting battery stats (Awake since last charge) for two charges using diff settings:
Auto-standby Off, 3-page Refresh Total time: 17:28 Consumed: 63% Change per hour: 3.61% Est remaining time: 7:13 (~25%) Auto-standby On, 6-page Refresh Total time: 23:24 Consumed: 60% Change per hour: 2.56% Est remaining time: 7:25 (19%) Except for the very first page turn after opening a book (sometimes very slow), I didn't notice the latency with Auto-standby On. When I wasn't doing much highlighting, I was consuming as low as 1.7% charge per hour. Battery life is not necessarily a priority for me. I never use it away from home. I'd more like to prioritize the longevity of the device. What puts more strain on the device: the extra battery use or the powering up and down of the auto-standby? |
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#23 |
Connoisseur
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 77
Karma: 81859
Join Date: Oct 2023
Location: Ontario, Canada
Device: Kobo Aura Edition 2, Kobo Clara 2E
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I've been experimenting with the KOReader for about a week now, and the battery statistics on my Clara 2E is indeed concerning. I'm seeing a reliable ~2-2.5% drop per hour when the device is sleeping. I woke up to 80% battery for the past 3 days where I left the device at 100%.
I'm experimenting with bluetooth drivers, so I may be doing weird things to the battery usage; I actually started by attributing this drain to running bluetoothd continuously. But today I killed bluetoothd and went back to the old state of the program, the drain persists. in in 6 hours, the battery drained by 18% (Change rate is 2.93%) all while the device was asleep. I'll monitor this situation and provide more of insights. |
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#24 | |
Connoisseur
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 77
Karma: 81859
Join Date: Oct 2023
Location: Ontario, Canada
Device: Kobo Aura Edition 2, Kobo Clara 2E
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#25 |
Member
![]() ![]() Posts: 22
Karma: 108
Join Date: May 2018
Device: Kobo Libra 2, Clara HD, Aura, Touch
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I have a Libra 2, wifi is off mostly, although I also noticed some higher battery drain. I read somewhere, when you turn on wifi, bluetooth is also turned on because they are on the same chip (?).
I try it out and kill bluetoothd as well, yet not sure how, but I guess it's in the terminal. Edit: Oh, I don't have bluetoothd as I don't do any experiments with bt. Oops my bad.) Though I have 1-2% power drain in sleep mode. Maybe I should just thinker with the settings a bit more. Otherwise koreader works perfectly and flawlessly. (Libra 2 rev 2) Last edited by Apollyon202; 08-08-2024 at 05:55 AM. |
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#26 | |
Wizard
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 1,653
Karma: 730583
Join Date: Oct 2014
Location: Antwerp
Device: Kobo Aura H2O
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I don't know if killing bluetoothd would necessarily do much one way or the other as long as lsmod shows various bt* things.
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#27 |
Connoisseur
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 77
Karma: 81859
Join Date: Oct 2023
Location: Ontario, Canada
Device: Kobo Aura Edition 2, Kobo Clara 2E
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The following routine eliminates this drastic battery drain due to bluetooth:
Code:
hciconfig hci0 down pkill hciattach pkill bluetoothd rmmod -w /drivers/mx6sll-ntx/wifi/sdio_bt_pwr.ko rmmod -w ./uhid/uhid.ko FWIW, it's not related to this thread anymore but I wrote this for my page turner plugin. A complete procedure on how to turn bluetooth on and off properly is in the shell scripts of the repository below. https://github.com/onatbas/bluetooth.koplugin |
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#28 |
Wizard
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 1,323
Karma: 16297052
Join Date: Sep 2022
Device: Kobo Libra 2
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Dare I ask why KOReader has Bluetooth running by default when the device is sleeping?
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#29 |
Connoisseur
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 77
Karma: 81859
Join Date: Oct 2023
Location: Ontario, Canada
Device: Kobo Aura Edition 2, Kobo Clara 2E
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Tags |
battery drain, kobo clara, koreader |
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Thread | Thread Starter | Forum | Replies | Last Post |
What am I doing to make my Kobo Clara HD battery drain so fast? | Aardman | Kobo Reader | 52 | 03-14-2023 01:26 PM |
Did I install KOReader wrong? (on Kobo Clara) | BlinkyEyes | KOReader | 2 | 08-01-2021 04:34 AM |
KOreader crashing on Kobo Clara HD | sirloinofbeef | KOReader | 2 | 01-27-2020 01:22 PM |
Clara HD battery drain of my kobo clara hd | lo5boy01 | Kobo Reader | 25 | 09-29-2019 10:19 AM |
KOReader sleep mode complete battery drain | maximus83 | KOReader | 10 | 01-27-2019 07:57 PM |