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Old 03-19-2020, 04:28 PM   #1
Scaledish
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Angry Battery tanking?

As many of you know, I just got a forma. I understand the light bands, but my battery stinks. with wifi off, in about 2 hours of reading, I lost 20% of battery. that's worse than my phone. . I use caliber, although not vigorously, just to put tor.com books on. so far I have only charged through my computer, to 100%. I HAVE NOT "repaired the device" as Microsoft suggests when I plug it in. I have not done a factory reset today, however yesterday after making a mistake getting pb chess, it had to repair its self, and that triggered a reset. even before that, the battery drained fast (wifi was on then). any ideas? I am on the latest firmware according to kobo sync.

TD;LR kobo forma battery issues
  • 10% a hour
  • wifi is off
  • factory reset due to error yesterday
  • still had issue yesterday
  • Barly use calibre (most books from overdrive)
any ideas?
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Old 03-19-2020, 04:34 PM   #2
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If you put too many books on at once, the battery (on any ebook reader) will drain fast as it attempts to index the titles.

How many titles have you put on - total?
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Old 03-19-2020, 04:36 PM   #3
Scaledish
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Quote:
Originally Posted by Dr. Drib View Post
If you put too many books on at once, the battery (on any ebook reader) will drain fast as it attempts to index the titles.

How many titles have you put on - total?
7
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Old 03-19-2020, 04:51 PM   #4
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Don't trust/worry about the actual value shown in the battery gauge, it's mostly wonky in various circumstances.

Worry about the actual runtime, which shouldn't be drastically different than that of any other eReader

EDIT: Provided nothing stupid is running on your device.
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Old 03-19-2020, 04:54 PM   #5
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Quote:
Originally Posted by NiLuJe View Post
Don't trust/worry about the actual value shown in the battery gauge, it's mostly wonky in various circumstances.

Worry about the actual runtime, which shouldn't be drastically different than that of any other eReader (EDIT: Provided nothing stupid is running on your device).
what are stupid things i could put on it? currently to my knowledge, it is stock, however there could be leftover from my old pb chess install. I will charge tonight and track the read time
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Old 03-19-2020, 07:21 PM   #6
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Perhaps there is a possibility one of the 7 is not indexing?
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Old 03-19-2020, 07:32 PM   #7
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Quote:
Originally Posted by Dr. Drib View Post
Perhaps there is a possibility one of the 7 is not indexing?
Kindle forums are *that* way.. Kobo's don't index.

That being said, it's very possible for a process to get stuck at full cpu utalization, and since there is no user accessible process monitor, the only indication of this you will see is unusual battery drain. The first thing to try is simply to reboot the device. press and hold the power button to force a shutdown. And turn it back on. (you will know you succeeded by the booting up dots/circles.)

Last edited by rashkae; 03-19-2020 at 07:34 PM.
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Old 03-19-2020, 08:10 PM   #8
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I thought you needed to go through a couple of charging cycles to calibrate the battery meter?
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Old 03-19-2020, 08:48 PM   #9
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Just to be clear, way in the past Kobo would claim 60 days of battery life for some of the ereaders. Then they claimed 30 days for the later devices. Now, the claim "weeks". From memory, the Aura ONE was the last one that used the time and it was the latter.

The original claims were based on 30 minutes of reading. So, the claimed battery life means 30 and 15 hours. Using the latter, 10% is 1.5 hours. That is worse than what you are seeing, but, it depends on what you are doing.

If the only thing you are doing is reading, then it isn't good. But, the more you turn the page, the faster the more power is used and the faster the battery is used. If you sit there paging through the library, it will use a lot of battery. What you read will have an affect on the battery life. Reading comics will probably use more power as the graphics have to be rendered and the pages are turned more often. And a faster reader will also run the battery down faster.

Other actions such as when new books are added will use a lot of power. Each book is read to get the metadata and update the database. That is going to be CPU and disk intensive, so adding a lot of books in one hit will use a lot of power. That's the only impact using calibre will have. But, odds are it will roughly balance out as when you have the device connected to add the books, it is charging the battery.

As @NiLuJe said, you need to use it and learn what the battery usage is like when you are just reading.
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Old 03-20-2020, 03:42 AM   #10
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Forma Battery life has been *way* better than 10% an hour for me. Though I think, besides turning off wifi, the single biggest variance will be how bright you have the light.
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Old 03-20-2020, 03:53 AM   #11
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Quote:
Originally Posted by Scaledish View Post
7
Depends on how big a book they are, too.

I just got a new (to me) Neal Stephenson which has 17.3 MB. It's fiction, one map, one picture. Another one by Stephen Fry has not a single picture but 17.8 MB and my cookbooks go up as high as 220 MB. Where old editions of Harlan Cobens "Myron Bolitar" had 0.3 MB the new ones have 4.4 MB. Mind you, none of them has a single picture or map that could cause this.

Like othes have said, it could be a mixture of big books, wifi on, playing with it a lot because it is new to you...

Another thing: Are you sure you are on the latest firmware? IIRC there was a firmware with a shorter battery life.
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Old 03-20-2020, 09:03 AM   #12
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Quote:
Originally Posted by Poppaea View Post
Depends on how big a book they are, too.

I just got a new (to me) Neal Stephenson which has 17.3 MB. It's fiction, one map, one picture. Another one by Stephen Fry has not a single picture but 17.8 MB and my cookbooks go up as high as 220 MB. Where old editions of Harlan Cobens "Myron Bolitar" had 0.3 MB the new ones have 4.4 MB. Mind you, none of them has a single picture or map that could cause this.

Like othes have said, it could be a mixture of big books, wifi on, playing with it a lot because it is new to you...

Another thing: Are you sure you are on the latest firmware? IIRC there was a firmware with a shorter battery life.
according to sync, yes, but I heard that that might not be correct always. it is 4.20.14622
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Old 03-20-2020, 11:08 AM   #13
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My old Aura HD had an amazing battery. I actually never charged it (on purpose) since it got charged enough due to my many Calibre-connections.

It's maybe 40% of what it used to be today, but it's still better than my Forma.

I hope the trend to go "light & thin" will end soon... (or maybe graphene batteries will make it a mute point).
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Old 03-20-2020, 12:45 PM   #14
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i always re-charge before it even gets to 50%
the way the world is now, a charged, and functioning reader, with plenty of books, is all you may have to preserve your sanity in social isolation if the internet shuts down

i see netflix has agreed to reduce streaming quality all across Europe - is nothing sacred ?
surely the powers that be could have shut pornhub instead and left us with some quality movie streams
[ & the pornhub fans could, like, use their imagination instead - worked when I was young ]
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Old 03-20-2020, 12:59 PM   #15
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I'll change my H2O sometime this weekend so I can update the firmware. I always charge before doing the firmware/patches.
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