I'm pulling this out of the latest firmware thread since I'm also having the problem with the previous firmware now (4.34). In general, my Forma's battery life is no worse than its ever been (call it 12 hours of reading with the settings I've always used). Starting with 4.35, I started experiencing sudden battery drain.
Basically, the Forma will either go to sleep on its own or I'll put it to sleep and the battery is at some reasonable amount. Usually overnight, but once while it was sitting on the desk next to me for about an hour, the battery will drain down to nothing. It will shut all the way down and sometimes display the warning that it needs charging. Other times, I don't even get that warning.
Just now, I picked up my Forma that I'd put to sleep last night with 41% charge, and even though it said it was sleeping, it was actually off. It was so battery drained that it wouldn't even come out of sleep. I plugged it in to the charger and after a while it powered on and showed 0% charge. It's charging now.
This started with 4.35, but I'm back on 4.34 and having the same problem. I've turned off automatic syncing and turned off its wifi. When it's sleeping, the screen "backlight" is off. Right now, I'm leaning towards it having something to do with connecting via usb to my Windows 10 computer for sideloading from Calibre. It seems like these events happen after doing that. But, what the problem could be, I don't know. I always eject the Forma from within Calibre and Windows never complains about any kind of dirty bit being set or any kind of corruption. I've also checked the database with Kobo Utilities and it finds no problem. I'm at a loss.
After this last instance, I'm going to do a full, manual factory reset and see if that helps.
EDIT: Also, I've edited all the books I've been reading to get rid of the publisher's horrible formatting and replaced it with mine. When I put the Forma to sleep, I'm out of the book and at the Home screen. So, it shouldn't be an issue with anything in the book. And, just for grins, here's the stylesheet for the latest book I'm reading:
Code:
@page { margin-top: 0; margin-left: 0; margin-right: 0; margin-bottom: 0; }
body { /* Basic Styling for BODY Section of a File */
height: 100%; orphans: 1; padding: 0; widows: 1 }
* + * {
/* Lobotomized Owl Selector - what to do any time two objects follow each other - limit to margin-top */
margin-top: 0.6em;
}
p {
/* Basic paragraph styling */
display: block;
text-indent: 1.2em;
}
h1, h2, h3 {
/* Basic Chapter Heading Styling */
page-break-before: always;
page-break-after: avoid;
text-align: center;
}
h1 + p, h2 + p, h3 + p, hr + p, .chapquote + p, .note + p {
/* Non-indented Paragraphs Styling (for paragraphs that follow something and shouldn't be indented) */
text-indent: 0;
}
h1 + p::first-letter, h2 + p::first-letter, h3 + p::first-letter, hr + p::first-letter, .chapquote + p::first-letter {
/* First-Letter Styling (for the first letter following certain things (IOW, dropcaps)) */
font-weight: bold;
}
h2 + p::first-line, h3 + p::first-line, hr + p::first-line, .chapquote + p::first-line {
/* Make first line of first paragraphs smallcap */
font-size: 1.05em;
font-variant: small-caps;
}
hr {
/* Thematic break to use 3 asterisks between parts of story */
margin-top: 0.9em;
margin-bottom: 0.9em;
border: none;
}
hr::before {
content: "***";
display: block;
text-align: center;
}
/*
* This whole section is styling for specific page types of a book
*/
section.acknowledgmentspage {
/* Acknowledgments Page Styling */
font-size: small;
margin-left: 5%;
margin-right: 5%;
text-align: center;
}
section.acknowledgmentspage p {
/* Acknowledgments Page Paragraph Styling */
display: block;
text-indent: 0;
}
section.alsobypage {
/* Also By Page Styling */
font-size: small;
margin-left: 5%;
margin-right: 5%;
text-align: center;
}
section.alsobypage p {
/* Also By Page Paragraph Styling */
display: block;
text-indent: 0;
}
section.copyrightpage {
/* Copyright Page Styling */
font-size: small;
margin-left: 5%;
margin-right: 5%;
text-align: center;
}
section.copyrightpage p {
/* Copyright Page Paragraph Styling */
display: block;
text-indent: 0;
}
section.dedicationpage {
/* Dedication Page Styling */
font-size: small;
font-style: italic;
margin-left: 5%;
margin-right: 5%;
text-align: center;
}
section.dedicationpage p {
/* Dedication Page Paragraph Styling */
display: block;
text-indent: 0;
}
section.drmpage {
/* DRM Statement Page Styling */
font-size: small;
margin-left: 5%;
margin-right: 5%;
text-align: center;
}
section.drmpage p {
/* DRM Statement Page Paragraph Styling */
display: block;
text-indent: 0;
}
section.epigraphpage {
/* Epigraph Page Styling */
font-size: small;
margin-left: 15%;
margin-right: 15%;
}
section.epigraphpage p {
/* Epigraph Page Paragraph Styling */
display: block;
text-indent: 0;
}
section.epigraphpage p.signature {
/* Epigraph Page Signature styling (basically right-justify) */
display: block;
text-align: right;
}
section.titlepage {
/* Title Page Styling */
margin-left: 5%;
margin-right: 5%;
text-align: center;
}
section.titlepage p {
/* Title Page Paragraph Styling */
display: block;
text-indent: 0;
}
/*
* This is a section for types of chunks on a page
*/
div.chapquote {
/* Chapter Quote (quote at top of chapters) Styling */
display: block;
font-style: italic;
margin-left: 1em;
margin-right: 1em;
padding: 1em;
text-align: justify;
}
div.chapquote p {
/* Chapter Quote Paragraph Styling */
display: block;
font-size: small;
text-indent: 0;
}
div.chapquote p.signature {
/* Chapquote Signature styling (basically right-justify) */
display: block;
text-align: right;
}
div.note {
/* Note Styling */
display: block;
font-size: 0.88em;
margin-left: 2em;
margin-right: 2em;
text-align: left;
}
div.note p {
/* Note Paragraph Style */
display: block;
text-indent: 0;
}
/*
* A styling section for things that apply everywhere
*/
.footnote {
/* Footnote Styling */
font-family: sans-serif;
font-size: 0.7em;
padding-top: 0.1em;
padding-bottom: 0.1em;
margin-left: 4em;
margin-right: 4em;
text-indent: 0;
border-top: 1px solid black;
border-bottom: 1px solid black;
page-break-inside: avoid;
}
.headline {
/* Styling for a placard or headline */
display: block;
font-size: 0.88em;
font-weight: bold;
padding-bottom: 0.6em;
padding-top: 0.6em;
text-align: center;
text-indent: 0;
}
.signature, .right {
/* Signature styling (basically right-justify) */
display: block;
text-align: right;
}
.small {
/* Small font style */
font-size: 0.75em;
}
.smallcaps {
/* Smallcaps styling (text should be typed normally and will be smallcapped) */
font-variant: small-caps;
}
/*
* Stuff Unique to Particular Books
* Running "Remove Unused CSS Rules" Will Remove Unnecessary Stuff
*/
div.status {
/* Status Styling for Computer Screen Responses */
display: block;
font-size: 0.88em;
font-weight: bold;
margin-left: 2em;
margin-right: 2em;
text-align: left;
}
div.status p {
/* Status Paragraph Style for Computer Screen Responses */
display: block;
margin-top: 0;
margin-bottom: 0;
text-indent: 0;
}