AGM battery has been on CTEK 7002 battery charger for four days.

[qualified-merc]

Four days ago, I placed a rather dead AGM battery on a CTEK 7002 battery charger. For two days the battery charger showed dead as a door nail. So, I read where one can take battery cables and jump a known good AGM battery to a dead AGM battery for one hour while the dead battery is on a charger.

Low and behold, it worked! It did, however, take another three days for the battery to come up to full charge. My question is how much longer should I leave this formerly dead AGM battery on the charger? two days? three days? or should I remove the CTEK charger now?