so i left my desulfator connected to this Trojan T-105 golf cart battery for 2 months and it seems to have no effects.
the discharge results in that video where 52.9 AH the results in this video where 53.5 AH. the differance is just the normal variations between charges.
so this does confirm my suspicion that desulfators might not do much, but it needs several more in-depth tests to show for sure. after all the desulfator i got was cheep and it arrived broken so i had to fix it.
music: Gremlins 2 on the Nintendo Entertainment System