hey s1mp13m4n,
you might want to look through
https://www.mobileread.com/forums/sho...d.php?t=109450
and in particular this part of it
https://www.mobileread.com/forums/sho...82&postcount=7
which has almost every JBL "trick" and cover ideas that have been posted here in the JBL forum except the posts about batteries and the "universal" fix for freezes to plug the JBL to the PC and the loooong push of the power switch after installing new/recharged batteries