Prolonge 12V battery life by equalize charge an refill with distilled water

This is Sprinter AGM battery doing equalizing charge.
This might have been a bit of an overfill, but there are hundred opionions about how to go about this...
... So.. Tell me I did it wrong in the comment section. :)
Also check out my other video doing Equalizing on a small 12V 17Ah battery.