Ok, people
After reading about 110 pages of a book and around 3 days in stand-by mode , the battery stood at 90-91%, which i would say is pretty well for a 2nd. hand-device ?
Now i have another problem

I have rooted my Nook. But now i need to put a cwm-recovery in order to install a few software readers and other progs (as .apk files). As i said before the firmware on my device is 1.2.1. On xda forums there is a topic about cwm-recovery for ver. 1.1 and iam not sure if it will work with my device...
Any other ways to install .apk files without using recovery application ?