09-27-2023, 08:17 AM | #46 |
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Forma is the biggest heap electronic shit I have ever paid more than $100 for! (Either that or Kobo's software engineers are the most incompetent morons to ever write firmware.)
I closed my Forma this morning at about 80% battery. This evening it wouldn't wake up. I had to plug it in and it showed zero battery. This is a replacement that is less than a year old when the Forma I bought died after less than a year. My partner's Forma died after 14 months. It's a real shame because when I bought it and it was working I loved it. |
02-02-2024, 05:39 PM | #47 |
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Well, this is worrying. My one year old Sage replacement for my old 1-1/2 year old Forma just suddenly shut off with an empty battery. No notification that the battery was low. Plugged it in and when it started up, the battery was at 1%. Hopefully, it's just a fluke. But, I'll have to keep an eye on it.
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02-02-2024, 05:55 PM | #48 | |
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Quote:
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02-03-2024, 02:28 AM | #49 |
Wizard
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The battery meter is notoriously unreliable. Unless you deep cycle it periodically, it will report numbers that are farther and farther away from reality.
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02-03-2024, 05:59 AM | #50 |
the rook, bossing Never.
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Or it could be faulty LiPoly cell. At least the cell can easily be replaced on a Sage.
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02-03-2024, 08:18 PM | #51 |
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or it could have gotten stuck syncing with wifi on or forever searching a pdf chewing cpu.
Both of those will drain battery. Reboot fixes both. |
02-04-2024, 06:43 AM | #52 |
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What do you consider a "deep cycle" and how periodically? I tend to go down to 20-40% and charge to 100%, and haven't had any strange battery meter behavior.
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02-04-2024, 12:17 PM | #53 | |
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Quote:
If you are already bringing it down to 20% (which is safe and probably doesn't hurt the battery life too much), then you may be slowly losing the remaining 10% in the meter. You might not notice for a year or two (or three)...at which time you should go lower. Last edited by compurandom; 02-04-2024 at 12:19 PM. |
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02-04-2024, 12:34 PM | #54 |
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I always let the battery get down to that 10% warning point. Wifi is off. No PDFs. Just the same use as always. With the Forma, battery drain was normal until it got a bit low (as noted earlier in this thread). I'll keep watch on it this cycle and see how it goes.
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02-04-2024, 12:56 PM | #55 |
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I keep wifi off. My Libra 2 recently went into high power drain mode, I could almost see the battery drain. I had just side loaded new books to the device. I restarted the Libra, and it was fine after that. Hadn't experienced a high drain event for months before that.
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02-04-2024, 02:15 PM | #56 |
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Oops. I forgot to mention I've been rebooting every couple of days recently (so I can sideload a book from Calibre without corrupting the database).
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02-04-2024, 03:45 PM | #57 | |
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02-04-2024, 05:05 PM | #58 |
Wizard
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I usually keep the charge between 25 - 85%, and after a few months the battery meter has started to lose its calibration in the past, saying that the battery is suddenly empty. It seems that if you don't drain the battery to the single digits every few months, the meter no longer reports the actual charge, and then when the voltage drops, you get the "sudden battery drain" symptom of the meter jumping from 30% to single digits over a matter of minutes.
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02-04-2024, 05:56 PM | #59 |
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02-04-2024, 07:57 PM | #60 |
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