Originally posted by Q99
His case is kinda an odd one. He's resurrected as his old form, but his old form's limit is lack of endurance, and Edo has no endurance limit, so I assume he's doing things more akin to his in-his-prime stuff since even if it'd drive him to what would be 'exhaustion' his edo body recovers.So I think it's a case where due to removing the endurance limit, he benefits more from Edo than almost anyone else. He's not fighting at his old-self level.
Heck, Chunin arc Sarutobi would probably be falling over dead after doing something like five large-scale jutsu using four clones each obviously with a lot of chakra in them!
That does not appear to be how it works. The ET bodies appear to take time to recover chakra even though it is infinite. I think a better label would be "unlimited chakra" but their the container for their chakra is only as large as it was when they were alive (and at which point in time their bodies were revived).
The attack Sarutobi did was not that huge. Just enough to counter. IMO, the Sarutobi that fought Oro would be halfway drained from that. That's pretty huge, being halfway drained.
But, his bodies will gather chakra, gradually, bringing him back to full stamina, again. I don't know how gradual but there does appear to be a limit on how fast it recovers, meaning, it is not instant.
Edit - I believe I pointed this out, before. But, if an ET body was smart, it would recover to full chakra, create a shadow clone, have both new bodies recover to full chakra, and repeat. Until you have so many damn full powered ET bodies that any jutsu is possible. Even a biju blast of monstrous scale.
Fuuck, you could even have a shadow clone go off and do just that: shadow clone itself and recover tons of chakra in the new bodies while the real ET body fights.
Then, you come back with a stupid powerful army of ET shadow clones. top lel.