Clara BW New files missing; Doesn't recharge

Shohreh · Yesterday, 06:16 AM

Hello,

Recently, I experienced the following issues with my Kobo Clara BW I bought 18 months ago:

1. Sometimes, files I copied don't show up on the Kobo: I must move them back to the computer, and move them once again to the Kobo — yes, I eject the device from Windows before unplugging it

2. The battery drains way faster than it should, and even after leaving it plugged in the whole night, it's only ~1/3 recharged — I tried two different chargers — Anker 5V 1A and Sologic 5V 2,4A.

Rebooting by long-pressing the button didn't solve it.

Upgrading today from 4.44.23552 (11/13/25) to 4.45.23464 (3/6/26) and trying a third charger (Asus 5,2V 1,35A) for one and half-hour seems to at least solved the charging issue.

Have others experienced those problems?

Thank you.

Hasdrubal_Lector · Yesterday, 06:10 PM

Batteries as they go through recharge cycles hold less of a charge. Your battery will apppear to drain faster because its maximum charge level is lower than it was when you bought the device. You can turn off wifi and bluetooth and only turn them on when you actively need them. Reduce screen brightness to the minimum you need for a pleasant reading experience. If you rely on a sleep cover to put your kobo to sleep, go to Settings>Energy Savings and Privacy and set the 'automatically go to sleep' setting to 5 minutes. Sometimes the sleep cover does not work. Never let the battery go below 20% if you can help it, and stop charging it when it is between 80%-90% full.

It sounds like a corrupted database. You can search this forum for possible solutions. There are many, so please forgive me for not listing them. The easiest is to log out of your kobo account, then log back in. That creates a new database. If you use Calibre, it can detect database corruption. It sounds like you are manually adding books to the Kobo.

kaden.haz · Yesterday, 07:18 PM

Your SD card may also be on its way out. The SD card in my KCHD fully gave out a while back and now I'm replacing it with a new SD card with the firmware added.

DNSB · Yesterday, 10:15 PM

I would also suspect a corrupt database. If you are not using calibre, you are not likely to notice unless you run a SQLite utility to check the database.
There is no µSD card in the Clara BW. It uses a eMMC chip soldered to the motherboard.

Yesterday, 06:16 AM	#1
Shohreh Addict Posts: 233 Karma: 304158 Join Date: Jan 2016 Location: France Device: none	New files missing; Doesn't recharge Hello, Recently, I experienced the following issues with my Kobo Clara BW I bought 18 months ago: 1. Sometimes, files I copied don't show up on the Kobo: I must move them back to the computer, and move them once again to the Kobo — yes, I eject the device from Windows before unplugging it 2. The battery drains way faster than it should, and even after leaving it plugged in the whole night, it's only ~1/3 recharged — I tried two different chargers — Anker 5V 1A and Sologic 5V 2,4A. Rebooting by long-pressing the button didn't solve it. Upgrading today from 4.44.23552 (11/13/25) to 4.45.23464 (3/6/26) and trying a third charger (Asus 5,2V 1,35A) for one and half-hour seems to at least solved the charging issue. Have others experienced those problems? Thank you. Last edited by Shohreh; Yesterday at 07:31 AM.

Yesterday, 10:15 PM	#4
DNSB Bibliophagist Posts: 51,042 Karma: 179232776 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	I would also suspect a corrupt database. If you are not using calibre, you are not likely to notice unless you run a SQLite utility to check the database. There is no µSD card in the Clara BW. It uses a eMMC chip soldered to the motherboard.

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Yesterday, 06:10 PM	#2
Hasdrubal_Lector Enthusiast Posts: 37 Karma: 599840 Join Date: Dec 2024 Location: Mid-Atlantic Region Device: Kobo Libra 2, iPad 8, Clara BW, Glowlight 4 Plus	Batteries as they go through recharge cycles hold less of a charge. Your battery will apppear to drain faster because its maximum charge level is lower than it was when you bought the device. You can turn off wifi and bluetooth and only turn them on when you actively need them. Reduce screen brightness to the minimum you need for a pleasant reading experience. If you rely on a sleep cover to put your kobo to sleep, go to Settings>Energy Savings and Privacy and set the 'automatically go to sleep' setting to 5 minutes. Sometimes the sleep cover does not work. Never let the battery go below 20% if you can help it, and stop charging it when it is between 80%-90% full. It sounds like a corrupted database. You can search this forum for possible solutions. There are many, so please forgive me for not listing them. The easiest is to log out of your kobo account, then log back in. That creates a new database. If you use Calibre, it can detect database corruption. It sounds like you are manually adding books to the Kobo.

Yesterday, 07:18 PM	#3
kaden.haz Junior Member Posts: 3 Karma: 10 Join Date: Apr 2026 Device: Kobo Clara HD	Your SD card may also be on its way out. The SD card in my KCHD fully gave out a while back and now I'm replacing it with a new SD card with the firmware added.

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