Battery drain in suspend mode

Galunid · 11-27-2020, 04:20 PM

So I've recently came across a thread about nova 2 draining battery quickly when not off. Mine does something similar, when it's in suspend mode, it loses ~1.5% every hour. When I went to Battery usage, it shows:
Tablet idle - 1%
Android OS - 1%
even though it lost ~32% since last charge. I did factory reset to see if it persists and it does. Bluetooth/wifi are obviously turned off. I didn't install anything, it's "clean" after factory reset. Any idea how to debug this?

ottischwenk · 11-28-2020, 12:53 AM

Quote:

Originally Posted by Galunid

So I've recently came across a thread about nova 2 draining battery quickly when not off. Mine does something similar, when it's in suspend mode, it loses ~1.5% every hour. When I went to Battery usage, it shows:
Tablet idle - 1%
Android OS - 1%
even though it lost ~32% since last charge. I did factory reset to see if it persists and it does. Bluetooth/wifi are obviously turned off. I didn't install anything, it's "clean" after factory reset. Any idea how to debug this?

I think an application running in the background is responsible for this.
I charged my Nova 2 6 days ago, picture the church, and it shows 86%.
I compared Poke 2 with Poke 3 because I was interested in the processor change:
24 hours with minute update clock sleep picture.
Poke 2 lost 11% Poke 3 lost 8%.

Galunid · 11-28-2020, 12:13 PM

I don't think there's actually anything that's running. I did factory reset, so there should be no background apps (at least installed by me), and since your device doesn't loose that much battery, I'd assume it's nothing preinstalled

ottischwenk · 11-28-2020, 12:34 PM

Quote:

Originally Posted by Galunid

I don't think there's actually anything that's running. I did factory reset, so there should be no background apps (at least installed by me), and since your device doesn't loose that much battery, I'd assume it's nothing preinstalled

I installed a lot:
Caliber Companion with about 14,000 books, AlReader,
Onleihe app and pocketbook app,
Kiwix, Perfect Viewer, Golden Dict,
Total Commander, exFAT / NTFS for USB by Paragon Software, Wifi File Transfer, Youtube.

Galunid · 11-30-2020, 05:19 AM

After consulting boox, the problem was that I had a magnetic usb C plug connected (https://www.aliexpress.com/item/4000478737800.html). Unplugging it solved the issue.

Millimole · 02-04-2021, 04:04 PM

Poke 2: I have had problems with huge battery drain using a magnetic cover (that turns the device on when opened, and off - supposedly - when the cover is closed).
I can't fathom what the issue is because the backlight is definitely off, and I rarely use Wifi.
Removing the magnet solves the problem. It's a 6" Kindle case that is a loose fit for the Poke 2 - I'm using adhesive velcro to hold the Poke2 in place, and have had to cut into the case cover to get to the magnet.

11-27-2020, 04:20 PM	#1
Galunid Zealot Posts: 122 Karma: 43580 Join Date: Apr 2016 Device: KPW3, Kobo Clara HD, Onyx Boox Nova 2	Battery drain in suspend mode So I've recently came across a thread about nova 2 draining battery quickly when not off. Mine does something similar, when it's in suspend mode, it loses ~1.5% every hour. When I went to Battery usage, it shows: Tablet idle - 1% Android OS - 1% even though it lost ~32% since last charge. I did factory reset to see if it persists and it does. Bluetooth/wifi are obviously turned off. I didn't install anything, it's "clean" after factory reset. Any idea how to debug this?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
KOReader sleep mode complete battery drain	maximus83	KOReader	10	01-27-2019 07:57 PM
Dictionnary mode and suspend	maxime	Kobo Reader	0	12-26-2012 05:46 PM
PRS-650 sleep-mode battery drain	luckycharms	Sony Reader	15	11-15-2011 07:08 PM
Touch Battery drain in standby mode?	John F	Barnes & Noble NOOK	4	10-09-2011 04:48 PM
Battery drain while in suspend mode	pat.indie	enTourage Archive	4	06-20-2010 11:54 AM

11-28-2020, 12:13 PM	#3
Galunid Zealot Posts: 122 Karma: 43580 Join Date: Apr 2016 Device: KPW3, Kobo Clara HD, Onyx Boox Nova 2	I don't think there's actually anything that's running. I did factory reset, so there should be no background apps (at least installed by me), and since your device doesn't loose that much battery, I'd assume it's nothing preinstalled

11-30-2020, 05:19 AM	#5
Galunid Zealot Posts: 122 Karma: 43580 Join Date: Apr 2016 Device: KPW3, Kobo Clara HD, Onyx Boox Nova 2	After consulting boox, the problem was that I had a magnetic usb C plug connected (https://www.aliexpress.com/item/4000478737800.html). Unplugging it solved the issue.

02-04-2021, 04:04 PM	#6
Millimole Member Posts: 12 Karma: 10 Join Date: Dec 2011 Device: Bookeen	Poke 2: I have had problems with huge battery drain using a magnetic cover (that turns the device on when opened, and off - supposedly - when the cover is closed). I can't fathom what the issue is because the backlight is definitely off, and I rarely use Wifi. Removing the magnet solves the problem. It's a 6" Kindle case that is a loose fit for the Poke 2 - I'm using adhesive velcro to hold the Poke2 in place, and have had to cut into the case cover to get to the magnet.