Q1. Possibly. Chakra is chakra.
Q2. Samehada*, and yes, I believe it does.
I believe it has a limit on how much it can absorb at one time and it does have a limit to how much chakra it stores. but when it reaches that limit it gives chakra to the wielder to make room for more food or chakra
Q1. Possibly. Chakra is chakra.
Q2. Samehada*, and yes, I believe it does.