Battery Low [Q] N8000 empty battery while boot loop


i tried to root my Note 10.1 (N8000, german, not locked) but ran into some problems. The tablet was struck in a boot loop (at the samsung logo) at the beginning of the weekend. I hadn't time to fix that and now, the battery seems to be empty and can't be charged anymore. After more than 2 hours of charing i still can't turn the tablet on... Download or recovery mode althoug don't work, the screen stas black.
Is a working system neccesary to charge the battery? And if so, are there any chances to fix that without sending it back to samsung?

Best regards in advance for your helpful advices!