Quote Originally Posted by November 11
Or chakra can regenerate overtime, so Shikamaru needs a short rest in between binds?
Chakra does indeed regenerate over time. As your chakra reserve depletes, stamina is converted into chakra.

@lilphatboi: no problem

Second Edit: I'm going to be pissed if whoever first posted the thing about that capsule being Kakuzu's blood. Or whether it's poison whatever. If you've guessed that right, then you're a manga reader that doesn't belong in here.
I wouldn't jump to conclusions just yet. It's a legit theory, and perfectly derivable from the anime alone.