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Old 05-05-2024, 02:43 PM   #1
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Battery life of Libra Colour

Kobo doubled the battery, but just after a reading session, I already lost 12% after an hour or so.

I charged it again, and same result after another reading session.

What's your experience so far?
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Old 05-05-2024, 04:34 PM   #2
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The battery increased from 1430 to 2050 mAh, so it's more like a 50% boost. Kobo's battery meter is notoriously unreliable, so you won't get meaningful numbers out of it until you cycle the battery at least once (and even then, it's not guaranteed). You're going to get fewer hour of reading on the LC if you pump up the frontlight to compensate for the dark screen.
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Old 05-05-2024, 05:00 PM   #3
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So far I've run it down to 1-2% twice and recharged to 100%. On this session, I've read for ~4 hours and the battery has dropped to ~78%. Frontlight at 25% and WiFi/Bluetooth off.
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Old 05-05-2024, 05:40 PM   #4
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I've read at night, with the frontlight set to 10, and natural light in the middle, in Dark Mode.
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Old 05-05-2024, 07:27 PM   #5
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Quote:
Originally Posted by Pen&Paper View Post
Kobo doubled the battery, but just after a reading session, I already lost 12% after an hour or so.

I charged it again, and same result after another reading session.

What's your experience so far?
What's your frontlight at?

Mine is between 25-33%. I drain at 2% per hour with text reading. I don't have WiFi disabled
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Old 05-05-2024, 08:31 PM   #6
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I expected the battery to drain quicker because the color feature works best with a brighter backlight, but after two days of use, I’m at around 40%, so it drains faster than my Clara 2E ever did, but I won’t mind charging every few days instead of every two weeks. I’m already conditioned to do that with my iPhone.
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Old 05-05-2024, 11:44 PM   #7
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I understand, but it’s a it disappointing.
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Old 05-06-2024, 12:26 AM   #8
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Yes, the battery capacity may have increased by 50%, but if you're using 3x more frontlight than before, the battery life will still be worse.
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Old 05-06-2024, 01:15 AM   #9
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I guess you haven’t read all the messages. I have read in dark mode at 10% for like an hour and losing 12% of battery.
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Old 05-06-2024, 01:21 AM   #10
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Your results still sound like an outlier. Even the Libra 2 isn't that bad, so your battery meter is probably just uncalibrated, as I said in my original message.
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Old 05-06-2024, 06:42 AM   #11
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Quote:
Originally Posted by Pen&Paper View Post
I guess you haven’t read all the messages. I have read in dark mode at 10% for like an hour and losing 12% of battery.
Dark mode only saves power on OLED. Typically needs higher brightness than regular paper style display. Though 12% isn't much, unless the 12% on Colour is like 24% or more on mono to give same apparent brightness.
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Old 05-06-2024, 09:24 AM   #12
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Not much help for extending battery-life, but I did found a possible interesting feature via SETTINGS > FIRMWARE INFORMATION as presented below.
It seems that the FW info pop-up is showing the current battery voltage (Vcom[mon]). Perhaps to aid in repairing (=battery replacement) of the device.
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Old 05-06-2024, 09:58 AM   #13
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Originally Posted by DrChiper View Post
Not much help for extending battery-life, but I did found a possible interesting feature via SETTINGS > FIRMWARE INFORMATION as presented below.
It seems that the FW info pop-up is showing the current battery voltage (Vcom[mon]). Perhaps to aid in repairing (=battery replacement) of the device.
vcom has to do with the voltage of the screen. Nothing to do with the battery.

Last edited by JSWolf; 05-06-2024 at 10:20 AM.
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Old 05-06-2024, 10:19 AM   #14
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You are right. See here for additional info.
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Old 05-06-2024, 10:34 AM   #15
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Quote:
Originally Posted by Quoth View Post
Dark mode only saves power on OLED. Typically needs higher brightness than regular paper style display. Though 12% isn't much, unless the 12% on Colour is like 24% or more on mono to give same apparent brightness.
I read in dark mode at night, not to save power, only because it's better for my eyes in my bedroom with no lights on.

Seeing how much battery the Libra was consuming, I thought maybe it has to do with dark mode on a colour screen? Like if the dark was a colour? I know, it's probably silly.
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