I picked up a couple of used Trojans last year, to join the other 4 old U.S. Batteries. The Trojans will charge up to 6.4v or so while the others are closer to 6.3 after a full charge.
I've noticed that the Trojans will almost always have some battery acid scattered over the tops after charging, while the others never do.
The water level is slightly below the rings.
Haven't ever been around to watch during the charging, but wondered about your thoughts on this. Are the Trojans bubbling more/more vigorously because they're fully charged sooner, and that's escaping? Do their cell caps release more vapor--purposely, or incorrectly? Defective batteries (the reason they were cheap)?
I've never loosened caps when I charge--just open the tractor compartments. Should I?
Thanks.
Thon
_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak