I don't think he was, but in "Point of No Return", when Zachariah was terminated, did he lose his powers, or rather his Grace? -- ImperiexSeed, 10:36 PM, March 12th 2012
I was just about to ask the same thing. It would make sense for low-level angels (so not Zachariah) to lose their grace when they fall from Heaven, as that is what supports their powers. --Jmac 703 (talk) 06:38, March 2, 2018 (UTC)
Anael said that her grace is recharge. Beside, in First Born it been said that when angels leave their vessels they leave behind some of their grace, so if it doesn't recharge the should very weaken.
Types of Grace
Is it safe to say that different classes of angels have different grace? Let me give examples.
Exhibit A, When Castiel Regained that one Angel's grace (I think his name was Theo) it didn't restore his Seraphim status because Theo was just a run of the mill angel, or as Dean would say like he told Crowley, "you're nothing but a punk ass angel."
Exhibit B, all the references to archangel grace (in that case archangel grace should be given its own separate pages because archangels are technically a different species entirely from Angel's basically their precursors due to them also being primordial beings) and Seraphim Grace is never worded it's just called grace, but archangel grace is usually referred to as archangel grace.
Exhibit C, when Lucifer stole a Cupid's grace he knew it wouldn't do much because cupids aka cherubim are the weakest known sub species of angel.
Rechargeability vol. 2
In Castiel's case the the stolen grace start to ran out because it was stolen. Crowley also said that stolen grace have a limited shelf life. Otherwhise, if the angel have it's own grace it will recharge eventually. Plus, in Devil's Bargain, Anael said there that her grace does recharge.